tag:blogger.com,1999:blog-256080052024-03-08T08:04:59.048+08:00DIY Electronicsleorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.comBlogger29125tag:blogger.com,1999:blog-25608005.post-58839571642606935962019-11-17T17:26:00.001+08:002019-11-17T17:35:48.916+08:00Dell ST2320LF 23 inch - no power<div style="text-align: center;">
Dell 2320Lf 23' display, no power issue, a quick check found out 2 diodes possibly short circuit.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDFgf9TGrp9_K1CQu_lHfc3-rdfxYTsBcTzJKA8_aqhR1miqYtM7Tkxomr0gSSk8uqA36aiGro2QnFUBk8CIpzYqHLhIO944Xn-LaPs3jW1ftJZGbjqo0S0Ffu3tw8I3XIGFjuRQ/s1600/IMG_20191117_133326_1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="900" data-original-width="1600" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDFgf9TGrp9_K1CQu_lHfc3-rdfxYTsBcTzJKA8_aqhR1miqYtM7Tkxomr0gSSk8uqA36aiGro2QnFUBk8CIpzYqHLhIO944Xn-LaPs3jW1ftJZGbjqo0S0Ffu3tw8I3XIGFjuRQ/s320/IMG_20191117_133326_1.jpg" width="320" /></a></div>
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Either diode D854 or D855 or both</div>
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Original parts = SR520, try to replace with equivalent part or higher, I replace with SB560 from old power supply board</div>
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com2tag:blogger.com,1999:blog-25608005.post-18582946496798772522018-06-07T22:48:00.000+08:002018-06-08T12:30:54.959+08:00w5500 Ethernet Module with Arduino Mega 2560<div class="separator" style="clear: both; text-align: center;">
This W5500 ethernet module available at Lazada for less than USD6</div>
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Just search for W5500</div>
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Connect through SPI</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuV_Ss8p13228Mrz0oVPu5QRHbyzPFxRI-rGkEgSSVgd4QbDxe0pWS7IuNrBf9_n_7QR8bogty5iVtd1B795xwvZJq5kxjl5HVl7okIXVI4K9k7fWjBvLkWfrHludXNU0hvt-1jg/s1600/w5500.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="850" data-original-width="850" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuV_Ss8p13228Mrz0oVPu5QRHbyzPFxRI-rGkEgSSVgd4QbDxe0pWS7IuNrBf9_n_7QR8bogty5iVtd1B795xwvZJq5kxjl5HVl7okIXVI4K9k7fWjBvLkWfrHludXNU0hvt-1jg/s320/w5500.jpg" width="320" /></a></div>
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7 connections needed from the ethernet module</div>
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(5V, GND, MISO, MOSI, SCK, RST & SS) to Arduino Mega 2560</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_wtmyd_Rptf3uQRifS_bW-aBkf7JZYoEMFuKk-wbjX0CkM5WzrktUmN55a-YjYB1RLeSq1ti5A0xAlaObJ5CBrgYzv4gcYOiyC-rjspsQogHvfOvn7iI3zX8tLAyUFyhygOGr_A/s1600/Snap+2018-06-07+at+22.12.25.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="438" data-original-width="945" height="148" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_wtmyd_Rptf3uQRifS_bW-aBkf7JZYoEMFuKk-wbjX0CkM5WzrktUmN55a-YjYB1RLeSq1ti5A0xAlaObJ5CBrgYzv4gcYOiyC-rjspsQogHvfOvn7iI3zX8tLAyUFyhygOGr_A/s320/Snap+2018-06-07+at+22.12.25.png" width="320" /></a></div>
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Arduino Mega 2560 pinout</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGxDuMzHAtv3G8o_GDWGxskOLlrBH_Ts2scsYuV56TF54dIUr2DLgSHbN0Di0UVyS6sYt6kMHvmkaa8SridQGxKU14avrQJXD6taTB1uVXt7bAqeTRjSAyM4C3mlOTFfs1YlslAg/s1600/Snap+2018-06-07+at+22.11.44.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="462" data-original-width="869" height="170" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGxDuMzHAtv3G8o_GDWGxskOLlrBH_Ts2scsYuV56TF54dIUr2DLgSHbN0Di0UVyS6sYt6kMHvmkaa8SridQGxKU14avrQJXD6taTB1uVXt7bAqeTRjSAyM4C3mlOTFfs1YlslAg/s320/Snap+2018-06-07+at+22.11.44.png" width="320" /></a></div>
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Connection in action</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh75dWbjOtfj_rBTVLPAq7Y_XQsvIa1o_evouAs4TNTZiQdWssrTDD2lGX7bGRPv91o0LTzDobSHn9Y1Nio0YCDzKnSbMNM4G-nddo5AhHOkxh_ENiPysRod54d3vH6Va7Xm0KL-Q/s1600/c1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="807" data-original-width="1024" height="252" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh75dWbjOtfj_rBTVLPAq7Y_XQsvIa1o_evouAs4TNTZiQdWssrTDD2lGX7bGRPv91o0LTzDobSHn9Y1Nio0YCDzKnSbMNM4G-nddo5AhHOkxh_ENiPysRod54d3vH6Va7Xm0KL-Q/s320/c1.jpg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiY3oMk8170rWqcIEh3xaqLRV-IT_swRZdXZ1NkJJqZrcbUPCyDBetIT7L7YDAQNOr6a_tTXv1ctYHiNhMVjfX4iDnLxq6MbaJ-pc-MHYd1QPFHNHLRAHCKQ_4dIjQ-JtbJn30ZHA/s1600/c3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1029" data-original-width="1024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiY3oMk8170rWqcIEh3xaqLRV-IT_swRZdXZ1NkJJqZrcbUPCyDBetIT7L7YDAQNOr6a_tTXv1ctYHiNhMVjfX4iDnLxq6MbaJ-pc-MHYd1QPFHNHLRAHCKQ_4dIjQ-JtbJn30ZHA/s320/c3.jpg" width="318" /></a></div>
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Get an example code from <a href="https://www.arduino.cc/en/Reference/Ethernet">https://www.arduino.cc/en/Reference/Ethernet</a></div>
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Make sure to compile with Ethernet2.h because this module is using W5500 chip</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj73M3SSoRiPPmWIoWpKtXAp7K8T2d9WpOPrJjUijt9uiENz-lOVrUh1rru2DLwfSJ2rOOaRURCpsrjvgYumMX_o-LhzKIb_4Lhos8Bca8JCuBfMiBcBATrlKtNjh6PoYzxZSBy4w/s1600/Snap+2018-06-07+at+22.18.49.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="110" data-original-width="289" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj73M3SSoRiPPmWIoWpKtXAp7K8T2d9WpOPrJjUijt9uiENz-lOVrUh1rru2DLwfSJ2rOOaRURCpsrjvgYumMX_o-LhzKIb_4Lhos8Bca8JCuBfMiBcBATrlKtNjh6PoYzxZSBy4w/s1600/Snap+2018-06-07+at+22.18.49.png" /></a></div>
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End result, it works!</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxHrXVyAoej_f-PWoH7l7IVQZNF20roxHQJhPE_K6fKBtBIyIDWAuoouegcfgk_HjqxShr_fHKQYZ2i12wB1gN8cneK9DTJdQO6QXZ2zKBkdpfWZnhUjPFYUz94UrGr7I-KIj5cQ/s1600/Snap+2018-06-07+at+22.20.34.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="264" data-original-width="558" height="151" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxHrXVyAoej_f-PWoH7l7IVQZNF20roxHQJhPE_K6fKBtBIyIDWAuoouegcfgk_HjqxShr_fHKQYZ2i12wB1gN8cneK9DTJdQO6QXZ2zKBkdpfWZnhUjPFYUz94UrGr7I-KIj5cQ/s320/Snap+2018-06-07+at+22.20.34.png" width="320" /></a></div>
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com8tag:blogger.com,1999:blog-25608005.post-73812769003650001292017-05-15T00:18:00.000+08:002017-05-15T00:18:21.023+08:00DIY Myvi - YI Dashcam InstallationMount the dash-cam accordingly. Tuck in the usb cable in the headliner until you reach the corner panel.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoUjFkg0BZuQ8MWR7eg27zL5JdGuTPlDuxwA32MNI0B4o4uASLcgx-tpLSr49c2zgfCYrRZhyejgp8s0Vkm_1GXFWwG_IFWiWb2EcVfhw7qabCBWJNkfolvSfig6lLdlyOCNPRWw/s1600/IMG_20170514_111831.jpg" imageanchor="1"><img border="0" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoUjFkg0BZuQ8MWR7eg27zL5JdGuTPlDuxwA32MNI0B4o4uASLcgx-tpLSr49c2zgfCYrRZhyejgp8s0Vkm_1GXFWwG_IFWiWb2EcVfhw7qabCBWJNkfolvSfig6lLdlyOCNPRWw/s320/IMG_20170514_111831.jpg" width="320" /></a><br />
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Pop up the corner panel. Careful not to break the panel clips. The are 5 of them.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjftxbjcveE7DTm_-GS6m-zzE7OtVFdXs0VrMkohnqpGYUxOyglmE-S42FV6b402gLPLLlmIJ0rZIGxiqXpx14xBvq8Ncj6V7oC2RyjkPidYJBavI_O09uFmMugfKgL_u0vXrg2Ug/s1600/IMG_20170514_102047.jpg" imageanchor="1"><img border="0" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjftxbjcveE7DTm_-GS6m-zzE7OtVFdXs0VrMkohnqpGYUxOyglmE-S42FV6b402gLPLLlmIJ0rZIGxiqXpx14xBvq8Ncj6V7oC2RyjkPidYJBavI_O09uFmMugfKgL_u0vXrg2Ug/s320/IMG_20170514_102047.jpg" width="320" /></a><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-RDDe6ncbEoo6K0j3fmM1sHoncpmND_HkYErvT_bgIv0AaU40SvypTfaA0Ak253AbOL1JtMQE9syllch6OtaDJtvcxe9gj5Gs9_sD1BFxLY3oTpiCCykOxyc2314jJZaFTWIZfg/s1600/IMG_20170514_102039.jpg" imageanchor="1"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-RDDe6ncbEoo6K0j3fmM1sHoncpmND_HkYErvT_bgIv0AaU40SvypTfaA0Ak253AbOL1JtMQE9syllch6OtaDJtvcxe9gj5Gs9_sD1BFxLY3oTpiCCykOxyc2314jJZaFTWIZfg/s320/IMG_20170514_102039.jpg" width="179" /></a><br />
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Run down the cable following the existing cable through an opening just beside the dashboard speaker.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix1VRn0DaHjaajymBvMF6isY4gIX_pG5eq-b3p6sr1RDYAMptJprnjpOpR1QDcCwsblN_oXPKAmMslA552zBjBWPR51CptZBh0sYeXgTtC73Q5gjZNFlIavF60e3N8_ExrJMELpg/s1600/IMG_20170514_111821.jpg" imageanchor="1"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix1VRn0DaHjaajymBvMF6isY4gIX_pG5eq-b3p6sr1RDYAMptJprnjpOpR1QDcCwsblN_oXPKAmMslA552zBjBWPR51CptZBh0sYeXgTtC73Q5gjZNFlIavF60e3N8_ExrJMELpg/s320/IMG_20170514_111821.jpg" width="179" /></a><br />
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And it should come out somewhere here, behind the dashboard drawer.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_zlUN6IPb3CdN87EN2z1T1A-TAFlBszO3s3vcyG2rMBJCtit_ZNthhbw8sFOKSrN71urHu2Oura89BXO4KPNaRo8mgm8BPAtsuScj271rtVysKS6uPn7q3c2OKw-OWWK-s1Itpg/s1600/IMG_20170514_102113.jpg" imageanchor="1"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_zlUN6IPb3CdN87EN2z1T1A-TAFlBszO3s3vcyG2rMBJCtit_ZNthhbw8sFOKSrN71urHu2Oura89BXO4KPNaRo8mgm8BPAtsuScj271rtVysKS6uPn7q3c2OKw-OWWK-s1Itpg/s320/IMG_20170514_102113.jpg" width="320" /></a><br />
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Properly lay the cable behind the dashboard drawer to access the cigarette socket and plug in the USB 5V adapter.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpTFmMm_MzBwt____X5nvwZ-jOAgeZifmJxmEUSzD9_v66FPf4elF6sdRv5t_3wuKN1GyE881eCvCs-pcI5xFYWcR1KXKnMOUiYjW9ExTrqKIRY7nvZ-ulySSvByq4ucEzttCVQg/s1600/IMG_20170514_111840.jpg" imageanchor="1"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpTFmMm_MzBwt____X5nvwZ-jOAgeZifmJxmEUSzD9_v66FPf4elF6sdRv5t_3wuKN1GyE881eCvCs-pcI5xFYWcR1KXKnMOUiYjW9ExTrqKIRY7nvZ-ulySSvByq4ucEzttCVQg/s320/IMG_20170514_111840.jpg" width="320" /></a><br />
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Later on I'm planning to get one of these, fuse tap, hard-wire it to the fuse-box through female cigarette socket.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4_F6Y2LPy8v88huuhnxN2in1XYkqze7iWHUl8m-ZT1Oojo5OP0Qoogm7os_-4OSYac5_jHtburczJ9A4NU2glgzkC-09Ou7_uHy7PLCpSeBRk63atPeap7iksl3YUJcncd7wS1w/s1600/41a30ow%252B0DL.jpg" imageanchor="1"><img border="0" height="260" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4_F6Y2LPy8v88huuhnxN2in1XYkqze7iWHUl8m-ZT1Oojo5OP0Qoogm7os_-4OSYac5_jHtburczJ9A4NU2glgzkC-09Ou7_uHy7PLCpSeBRk63atPeap7iksl3YUJcncd7wS1w/s320/41a30ow%252B0DL.jpg" width="320" /></a><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVnhD4JC34ltb28Oe0b0pg-ObGHQuJyuXvNWbAbFAboPtWjYgJAhhwiniJtB4mWRUeKDAQW3rPsYdqwrV46_xcXNv5jDP9aCErbumsf9C6d4z3uqZnLRVdb_rL0iwTxs4-H5Fk7w/s1600/AME005400_2_ALL_zps931e36c1.jpg" imageanchor="1"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVnhD4JC34ltb28Oe0b0pg-ObGHQuJyuXvNWbAbFAboPtWjYgJAhhwiniJtB4mWRUeKDAQW3rPsYdqwrV46_xcXNv5jDP9aCErbumsf9C6d4z3uqZnLRVdb_rL0iwTxs4-H5Fk7w/s320/AME005400_2_ALL_zps931e36c1.jpg" width="320" /></a><br />
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There are still empty spare slots there that we can hook it in.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpQZDFqknSdtCLW1EF3ZFsuxXzqtMd08VVhFel8CzvYQDF2WXLaX92Z6fGeW6HI4vahFsJ_lqZtwS0MJSADW0AHkKqCUVlJ1fY1XN7S-7okWdRqZApBL4bXlKRm2nkRfwwhBgoWA/s1600/IMG_20170514_102121.jpg" imageanchor="1"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpQZDFqknSdtCLW1EF3ZFsuxXzqtMd08VVhFel8CzvYQDF2WXLaX92Z6fGeW6HI4vahFsJ_lqZtwS0MJSADW0AHkKqCUVlJ1fY1XN7S-7okWdRqZApBL4bXlKRm2nkRfwwhBgoWA/s320/IMG_20170514_102121.jpg" width="180" /></a>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com4tag:blogger.com,1999:blog-25608005.post-5233440882226834282016-11-29T23:38:00.002+08:002016-11-29T23:45:25.752+08:00Arduino - Cheap/Poor Man's CT SensorThere are several references on how to do this such as;<br />
<br />
<ul><li><a href="https://openenergymonitor.org/emon/buildingblocks/ct-sensors-interface" target="_blank">CT sensors - Interfacing with an Arduino</a></li>
<li><a href="https://openenergymonitor.org/emon/buildingblocks/how-to-build-an-arduino-energy-monitor-measuring-current-only?page=1" target="_blank">How to build an Arduino energy monitor - measuring mains current only.</a></li>
</ul><br />
For my case, I would like to try it first before start buying a CT sensor.<br />
So I come out with below idea, using toroid inductor/coil for testing.<br />
<br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHn9qV5K9_AFTdJVCok9_3JxNJLg-T9vXsj1eGTr5wt8_RlYpHVCHE69I-ClE-3HaZrOPvJbWN7BRrrwyK8sLpkzAPeuuBoU0dQsO5mrk_o8pbbFZBI5zw7vP5kx5zh6Q58YvDig/s1600/IMG_20161117_215411.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHn9qV5K9_AFTdJVCok9_3JxNJLg-T9vXsj1eGTr5wt8_RlYpHVCHE69I-ClE-3HaZrOPvJbWN7BRrrwyK8sLpkzAPeuuBoU0dQsO5mrk_o8pbbFZBI5zw7vP5kx5zh6Q58YvDig/s320/IMG_20161117_215411.jpg" width="320" /></a></div><br />
Live wire 240VAC going through the toroid.<br />
Please take precautionary steps with this.<br />
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Arduino and sensor board setup<br />
<br />
<pre class="brush: cpp">#include "EmonLib.h" // Include Emon Library
EnergyMonitor emon1; // Create an instance
void setup()
{
Serial.begin(9600);
emon1.current(1, 500); // Current: input pin, calibration.
}
void loop()
{
double Irms = emon1.calcIrms(2000); // Calculate Irms only
Serial.println(Irms); // Irms
}
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Arduino sketch - quick copy/paste code<br />
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Hook it up and testing. It will not be accurate, just to get an idea on how it works.<br />
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leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-53398649331162257262016-01-02T00:30:00.000+08:002016-01-02T00:31:37.461+08:00IBM 9512-AB1 TFT Monitor 715A917-1-4 Backlight Inverter Fix<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7PIuliofJ07eEUFjPlJYYooTMB9eAvw3yprXu5c2XlRi0Cxze0rScxFJOUItEC3qL2Dh6ixZUyXkuXi5-qiVKC7sr1zlGxM_saEyehqBlm223UsiV5GuzpOXGp4DzhAvHSh7yiQ/s1600/IMG_20151231_203955.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7PIuliofJ07eEUFjPlJYYooTMB9eAvw3yprXu5c2XlRi0Cxze0rScxFJOUItEC3qL2Dh6ixZUyXkuXi5-qiVKC7sr1zlGxM_saEyehqBlm223UsiV5GuzpOXGp4DzhAvHSh7yiQ/s320/IMG_20151231_203955.jpg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEBimefx0aKSA-dLkSh88MqRV4BXikFVWPZONgX4Xb_VPhE-vbZNAwdADGwkOqfPaPDNcR7rSz8INXQ7R4co8LR_6PWuCpA7hdKHytDkNlsHRQWw1u8JbjiET6Tpxt7WOIV-cFVA/s1600/IMG_20151229_183220.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEBimefx0aKSA-dLkSh88MqRV4BXikFVWPZONgX4Xb_VPhE-vbZNAwdADGwkOqfPaPDNcR7rSz8INXQ7R4co8LR_6PWuCpA7hdKHytDkNlsHRQWw1u8JbjiET6Tpxt7WOIV-cFVA/s320/IMG_20151229_183220.jpg" width="320" /></a></div>
<div style="text-align: center;">
Symptom, no backlight, but the LCD it self is OK.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRIYCfXeba8LlPY6_PCcux0rd25IukNFMKr0s_Jv44Y07bo1fJP9OiX7ciwIhsly0vhuCi5_VJvwxTuz8sugG2wizv8VYibcadNZ3ZS5pMmgh_QRa4FGLdnc4mrnKTCTb2G4Grhg/s1600/IMG_20151228_231813.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRIYCfXeba8LlPY6_PCcux0rd25IukNFMKr0s_Jv44Y07bo1fJP9OiX7ciwIhsly0vhuCi5_VJvwxTuz8sugG2wizv8VYibcadNZ3ZS5pMmgh_QRa4FGLdnc4mrnKTCTb2G4Grhg/s320/IMG_20151228_231813.jpg" width="320" /></a></div>
<div style="text-align: center;">
Inverter board (left) and main board (right).</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwRGQy9NZMQJdPWGn2J6S2pfPbi_EA0-VYsqw0F0bZDBPR_tnE7H3tG7BZsIzDT7MJqIr584AEFYxM9oaUeKAgrhc9srm8aUMraMq7ch4FCdlCNQflWd2VQ0Uz0m9J1Ye4cyC1sQ/s1600/IMG_20151228_231147.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwRGQy9NZMQJdPWGn2J6S2pfPbi_EA0-VYsqw0F0bZDBPR_tnE7H3tG7BZsIzDT7MJqIr584AEFYxM9oaUeKAgrhc9srm8aUMraMq7ch4FCdlCNQflWd2VQ0Uz0m9J1Ye4cyC1sQ/s320/IMG_20151228_231147.jpg" width="320" /></a></div>
<div style="text-align: center;">
Inverter board close up.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiREjqdqZ_ZdpWTQuZ-X9iIKEx0Zfttp5p3pn2CBxiNOJS74xlEW8map8MRcHo6DgrRiSrgHqcfyQ5hN4rmlmgFI7zI2QRWDv0iVzC6MNwbDO8R-vDb5KFHtsn98POtrcAfKAbtGQ/s1600/Snap+2016-01-02+at+00.02.58.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="243" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiREjqdqZ_ZdpWTQuZ-X9iIKEx0Zfttp5p3pn2CBxiNOJS74xlEW8map8MRcHo6DgrRiSrgHqcfyQ5hN4rmlmgFI7zI2QRWDv0iVzC6MNwbDO8R-vDb5KFHtsn98POtrcAfKAbtGQ/s320/Snap+2016-01-02+at+00.02.58.jpg" width="320" /></a></div>
<div style="text-align: center;">
From my observation, this board will works when hot but not when cold.</div>
<div style="text-align: center;">
A lot of try and error to trace this but finally, found the culprit.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGN13JjQ7xEg__b8u7xWWzXcpxlIR4Ry6XeIPJVEkIai6MVNeHCpItvpUd-x5ahbnQm4upkJSEgpJCUZu2pSzQoT-dtPHViis_opsKADq8YiwqxKUNuxMVBiB1RDS-4XQMyGRe4g/s1600/Snap+2016-01-02+at+00.17.08.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="249" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGN13JjQ7xEg__b8u7xWWzXcpxlIR4Ry6XeIPJVEkIai6MVNeHCpItvpUd-x5ahbnQm4upkJSEgpJCUZu2pSzQoT-dtPHViis_opsKADq8YiwqxKUNuxMVBiB1RDS-4XQMyGRe4g/s320/Snap+2016-01-02+at+00.17.08.jpg" width="320" /></a></div>
<div style="text-align: center;">
This cap value determine the 5001C PWM controller short circuit protection timing. As mentioned in the <a href="http://www.ti.com/product/tl5001" target="_blank">5001C PWM controller datasheet</a>, the timing must be much longer (generally 10 to 15 times) than the converter start-up period or the converter will not start.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-WBsQqvxrqD7P9Gc6kT2cCPXuHIUwT3579uxV7lerX2S6MZTgsCRLNbBQMg00-lfZOw5_3p6txUyIp_fVxppSyC8DK2R-5JXiaJwfuu3qpwMQ2DGVzpXLi_j1AkLBQRZLujx0lg/s1600/IMG_20151231_203831.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-WBsQqvxrqD7P9Gc6kT2cCPXuHIUwT3579uxV7lerX2S6MZTgsCRLNbBQMg00-lfZOw5_3p6txUyIp_fVxppSyC8DK2R-5JXiaJwfuu3qpwMQ2DGVzpXLi_j1AkLBQRZLujx0lg/s320/IMG_20151231_203831.jpg" width="240" /></a></div>
<div style="text-align: center;">
Replace with Aluminum caps for testing...</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgatAHMOMFFBD_rMOhG7c-aBocaQFrNn3dlZB2X1BXAa7ZAtObjRBqh3mWu1f7duAEOCxTLtEzwNdeyc_xuhxz0rx5AFXH4ogfC7sb0HBWmJmu_LES5kLU2_8SEdsmhXBH4tlILqg/s1600/IMG_20151231_194805.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgatAHMOMFFBD_rMOhG7c-aBocaQFrNn3dlZB2X1BXAa7ZAtObjRBqh3mWu1f7duAEOCxTLtEzwNdeyc_xuhxz0rx5AFXH4ogfC7sb0HBWmJmu_LES5kLU2_8SEdsmhXBH4tlILqg/s320/IMG_20151231_194805.jpg" width="320" /></a></div>
<div style="text-align: center;">
Put it back in...</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEf_ulNIMvvevsJG09K-s_mL9nRULma7jfdI1rduzMu_UUlm3_y8fUXtxZWEDGRmEJHbOX5BRTHxqe1AA_RPclIhZGcQD0A27t9jdiNfcfmCK55FfwnmvXoz_lInNzqe0vhjBH5Q/s1600/IMG_20151231_190619.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEf_ulNIMvvevsJG09K-s_mL9nRULma7jfdI1rduzMu_UUlm3_y8fUXtxZWEDGRmEJHbOX5BRTHxqe1AA_RPclIhZGcQD0A27t9jdiNfcfmCK55FfwnmvXoz_lInNzqe0vhjBH5Q/s320/IMG_20151231_190619.jpg" width="320" /></a></div>
<div style="text-align: center;">
There you go :-)</div>
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-24635476887467868502015-12-24T22:35:00.000+08:002015-12-24T22:35:03.939+08:00Replacing Haier L32A16 Backlight To LEDBefore...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_N4dM9_5DdlNOxk4NFctGJIoACCq6YoxE8uHeQ7-mUR92VA5Hr16fBI95LuQjt7-wRiRhhLBsM-LUnGaiOIQLZELRA__01Cil9tlTSMhuftDyQM-RD8FV6QxB78YNEOIDZhmM7Q/s1600/IMG-20151201-WA0012.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_N4dM9_5DdlNOxk4NFctGJIoACCq6YoxE8uHeQ7-mUR92VA5Hr16fBI95LuQjt7-wRiRhhLBsM-LUnGaiOIQLZELRA__01Cil9tlTSMhuftDyQM-RD8FV6QxB78YNEOIDZhmM7Q/s320/IMG-20151201-WA0012.jpeg" width="320" /></a></div>
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Get a white LED strip. 5 meters = USD7<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9d_O0qj7m0iN2Hk7ad0jixeb8vsvVW5hEkhFCkkABcyv1GDOI6Kr5fOXyd3P1RNA5mwf2lekJPDB6VKSSWEPhyphenhyphenSbPpieo9DtijQLtCP8f3OMS4T0TfKUL5PJf08Lc9Rozpz0jNw/s1600/enliven3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9d_O0qj7m0iN2Hk7ad0jixeb8vsvVW5hEkhFCkkABcyv1GDOI6Kr5fOXyd3P1RNA5mwf2lekJPDB6VKSSWEPhyphenhyphenSbPpieo9DtijQLtCP8f3OMS4T0TfKUL5PJf08Lc9Rozpz0jNw/s320/enliven3.jpg" width="320" /></a></div>
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Mount it...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhj2dIryc_6CCW76BG7-KDLdTZc7Pj2EgkasZ1gx9ye8sr0mme-7bTOQxjdic-z5PDegCdr4VOHyR3RASVHShqBJrxK_mS7qcfQbnQ54zJm_4A23INE7BhZ054KEEoRv0B5qvvaIg/s1600/IMG_20151215_184203.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhj2dIryc_6CCW76BG7-KDLdTZc7Pj2EgkasZ1gx9ye8sr0mme-7bTOQxjdic-z5PDegCdr4VOHyR3RASVHShqBJrxK_mS7qcfQbnQ54zJm_4A23INE7BhZ054KEEoRv0B5qvvaIg/s320/IMG_20151215_184203.jpg" width="320" /></a></div>
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End result...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVCawUXHc3vmn6Rtjpet-N_gEqmqNGClj9xBV_A4qhsvANdegu1uRYVEvivHYjFPLJOLZiHgbdTdh4Ai7ObUxNo2uQ6xc9zTLNdyC9mFLZXAQ_nKB5-OCwMZt5DzecBzEqW1J_mg/s1600/IMG_20151215_191656.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVCawUXHc3vmn6Rtjpet-N_gEqmqNGClj9xBV_A4qhsvANdegu1uRYVEvivHYjFPLJOLZiHgbdTdh4Ai7ObUxNo2uQ6xc9zTLNdyC9mFLZXAQ_nKB5-OCwMZt5DzecBzEqW1J_mg/s320/IMG_20151215_191656.jpg" width="320" /></a></div>
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-58725017095424598642015-10-16T22:27:00.000+08:002015-10-16T22:27:53.452+08:00Noxxa Multifunction Pressure Cooker - No PowerJust to share how to fix Noxxa Multifunction Pressure Cooker no power issue.<br />
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Symptom: The front panel didn't light up. So let's open it.<br />
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Start check the simple things first, temperature fuse continuity? OK, any swollen capacitors? nope!<br />
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Next, power it up and check is there any output before (AC) and after the bridge (DC)? YES.<br />
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Regulator (7805) output? NO! Found it. Input is about 14V but no output<br />
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This is the power supply for the front panel circuit board.<br />
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Desolder it out an do a quick test by it an 12v input<br />
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No output at all, compare with the new one<br />
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Put it back together again, plus a heat sink to the 7805 regulator. This might prevent it from overheating again, I hope so.<br />
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Finallly :-)<br />
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com16tag:blogger.com,1999:blog-25608005.post-82634435303679501892014-10-03T23:30:00.000+08:002014-10-03T23:30:38.651+08:00Samsung SyncMaster 732NW Power Supply Modification<br />
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A Samsung SyncMaster 732NW Monitor came in last 3 weeks into my workshop after getting struck by lightning. This is what happen to the power supply board.<br />
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A bad capacitor, several diodes shorted, a blown fuse and blown SMPS Power Switch. Luckily the digital board, LCD and back-light still OK.<br />
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This is the heart of SMPS, the chopper (PWM) controller with built-in SenseFET by Fairchild.<br />
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Too many parts need to be replaced. So here is the shortcut. :-)<br />
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From the schematic diagram, we can see that it requires 2 types of power sources, 15VDC and 5.1VDC. Desktop power supply will do the job. It can supply 12VDC and 5VDC. Lower but tested working fine. 5VDC for the digital board and 12VDC for the back-light inverter.<br />
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A quick modification using 4-pin peripheral power connector. Several bulky components removed from the heavily damaged primary section.<br />
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There you go...<br />
<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com2tag:blogger.com,1999:blog-25608005.post-53479374963583167732014-05-21T00:08:00.002+08:002014-05-28T21:34:42.983+08:00Panasonic TH-P42X30K Plasma TV Power Board FixThis is my own Plasma TV. Symptom, sudden power cut off. Power LED not lit at all when the side power button switched on. According to the service manual [ <a href="http://search.4shared.com/postDownload/9goO4wa5/th_p42x30d_g_k_m_p_s_v_1.html" target="_blank">th_p42x30d_g_k_m_p_s_v_1.pdf</a> ] , this is power board issue.<br />
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Trace further and narrow down the search to standby power section. Standby voltage (5V) is totally down.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRM_pfxCLaUA1tIrLWvRg6pgDguK6X_qIRZ26Yps19NPuyHoL5F-f1N0qPLcCRsDz4Hhn-fy3jxOi-JLmTyMnW3Rqhnu1QkcOXNHCnGB5jCDKQ0S01J9ZQZxGdpgHSr5ZD_rLZkw/s1600/Snap+2014-05-20+at+22.51.52.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRM_pfxCLaUA1tIrLWvRg6pgDguK6X_qIRZ26Yps19NPuyHoL5F-f1N0qPLcCRsDz4Hhn-fy3jxOi-JLmTyMnW3Rqhnu1QkcOXNHCnGB5jCDKQ0S01J9ZQZxGdpgHSr5ZD_rLZkw/s1600/Snap+2014-05-20+at+22.51.52.png" height="220" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">B159-003 Power Board Block Diagram</td></tr>
</tbody></table>
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This section on the B159-002 power board, component side.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyAwVtabEPR0jEM6XWihySe28gxxglUoDHjl2EuMP99eUjfT-XodTeGBqC-V-cJUUTbWGmjRZv5hAyVww-h6t3cAOmr4JqG7NrCl7lGbAfvBZNAb0lYzpkn7F231db2c5HeD_Vag/s1600/Snap+2014-05-20+at+22.59.35.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyAwVtabEPR0jEM6XWihySe28gxxglUoDHjl2EuMP99eUjfT-XodTeGBqC-V-cJUUTbWGmjRZv5hAyVww-h6t3cAOmr4JqG7NrCl7lGbAfvBZNAb0lYzpkn7F231db2c5HeD_Vag/s1600/Snap+2014-05-20+at+22.59.35.png" height="185" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">B159-002 Power Board Component Side</td></tr>
</tbody></table>
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This diode fails become short circuit, part of the secondary side of the transformer that feedback to FAN6754 PWM controller pin 2 (FB)<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsw03p0_f5m9TLivbn7uwL60akdg0rfjkRHc9swQcMiWwir7RDN9FtC-AYXKJ1cFRlDMG8EWsTtDbLg9XQD4bByvY8IyR0pkoy9SAMCDuQD4Vg3Au2_QMrYmMi7BLdqrP-INGGqQ/s1600/Snap+2014-05-20+at+23.24.25.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsw03p0_f5m9TLivbn7uwL60akdg0rfjkRHc9swQcMiWwir7RDN9FtC-AYXKJ1cFRlDMG8EWsTtDbLg9XQD4bByvY8IyR0pkoy9SAMCDuQD4Vg3Au2_QMrYmMi7BLdqrP-INGGqQ/s1600/Snap+2014-05-20+at+23.24.25.jpg" height="202" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">FAN6754 Typical Application schematics, not the actual schematics</td></tr>
</tbody></table>
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It is B3100 diode that should be able to withstand 100V peak and 70V RMS reverse voltage<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg0VTfg6JV7j7t0RDX0iEnJqRpVwyh50N8EC-lgMHum8jFQ1j_Zq0I-Yxz-7Xluw1_o6j78XQ-El5gd1pzz-cKB47W3hSqAHgIYDo4V2D3Y823qGuQpQOzSeL9B9F8ZOf2roemHkQ/s1600/Snap+2014-05-20+at+23.03.36.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg0VTfg6JV7j7t0RDX0iEnJqRpVwyh50N8EC-lgMHum8jFQ1j_Zq0I-Yxz-7Xluw1_o6j78XQ-El5gd1pzz-cKB47W3hSqAHgIYDo4V2D3Y823qGuQpQOzSeL9B9F8ZOf2roemHkQ/s1600/Snap+2014-05-20+at+23.03.36.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">3.0A HIGH VOLTAGE SCHOTTKY BARRIER RECTIFIER</td></tr>
</tbody></table>
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Replace this FML-G22S, the best I have currently, salvage from old PCB.<br />
It can withstand 200V peak.<br />
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Now, I can see the 5V standby voltage. Put everything back together and test.<br />
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Will try to find the actual component soon (B3100) for replacement.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com9tag:blogger.com,1999:blog-25608005.post-53961586824946904962013-08-16T00:48:00.000+08:002013-08-16T00:48:54.611+08:00Replacing Dell E153FPC 15" LCD Monitor Backlight With LEDMy old Dell E153FPC back-light recently failed to light up.Tracing lead me to the bad inverter circuit and broken CCFL back-light.<br />
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So replacing with an LED would be a great idea. Refering to <a href="http://www.instructables.com/id/LED-Backlight-for-Your-LCD-Monitor-or-Television/" target="_blank">Instructables</a>, I'm planning to do the same thing but the LED flex/strip here cost more than a used/refurbished LCD monitor.<br />
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A cheap solution is by creating my own LED bar. 3 white LEDs in series with current limiting resistor. Calculated to works with 12VDC.<br />
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The CCFL backlights have been removed earlier but I did not snap any image during the process. Please Google for this. Next, test the LED back-light.<br />
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Does not look like what you expected? Wait until you turn it on.<br />
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Connect it to 12VDC source that can be found on the power supply board. A fuse added just in case. Use a detachable connector for easy troubleshooting later on.<br />
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Tadaa! although the light source does not emit its rays uniformly, but for me this is enough since I'm planning to use this monitor just for PC troubleshooting.<br />
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Finally, put them back together again. From now on, this monitor is no longer an LCD Monitor but an LED Monitor :-)leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-42007697433544129562013-08-16T00:02:00.000+08:002013-08-16T00:04:02.449+08:00Samsung Syncmaster 2043 Flickering FixReceived Samsung Syncmaster 2043 from a friend, suffering from a flickering problem.<br />
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Quick search from internet advice to look for a crack/swollen capacitor(s)<br />
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Immedialtly found 2 bad capacitors. What a luck!. Replace 2 new 1000µF 10V capacitors...<br />
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and put it back together again.<br />
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-53023130447595451882013-05-15T19:35:00.000+08:002013-05-15T19:35:09.091+08:00Arduino Controlled Water Boiler and Warmer / Thermo Pot<link href="http://alexgorbatchev.com/pub/sh/current/styles/shThemeDefault.css" rel="stylesheet" type="text/css"></link><br />
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I have an electric water boiler and warmer AKA thermo pot which was struck by lightning. The circuit board was heavily damaged beyond repair.<br />
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But the good news is all other parts such as heating elements, DC motor pump and temperature sensor still OK. So this is how the project started.<br />
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Before this project started, I did talk to my brother about Arduino. Sounds like fun. So I give them a try. I choose Arduino Uno for this project since it is highly recommended for a beginner.<br />
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Typical electric water boiler and warmer has 2 heating elements, boiler and warmer.<br />
<ul>
<li>Boiler : 3A : 80Ω : 720W</li>
<li>Warmer : 0.6A : 390Ω : 144W</li>
</ul>
The DC motor pump working voltage is DC 9V.<br />
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I'm not sure what type of temperature sensor used by this boiler but from my study, it measures;<br />
<ul>
<li>Around 100kΩ when 33°C (room temp)</li>
<li>Around 10kΩ when 100°C (boiled)</li>
</ul>
The question now is how to translate this value 100kΩ<=>10kΩ to 33°C<=>100°C? I start with a simple voltage divider, 5V DC, smoothing E capacitor and link them to Arduino pin A0 (AnalogInput)...<br />
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<ul>
<li>R5 = 10kΩ</li>
<li>C1 = 1µF </li>
</ul>
...wrote a simple program as below to get the AnalogInput value during both room temperature and boiled temperature.<br />
<pre class="brush: cpp">int sensorPin = A0;
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println(analogRead(sensorPin));
delay(1000);
}</pre>
From this test it reads... <br />
<ul>
<li>Analog Value 116 while 33°C (room temp)</li>
<li>Analog Value 594 while 100°C (boiled)</li>
</ul>
So a simple linear equation (y = mx + c) in a function like below could be used to read the analog input and translate them to °C<br />
<pre class="brush: cpp">float getTemp(int sensorValue){
float y1 = 100;
float x1 = 594;
float y2 = 33;
float x2 = 116;
float m = (y1 - y2) / (x1 - x2);
float c = y1 - (m * x1);
return (m * sensorValue) + c;
}</pre>
From there I continue with other features;<br />
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16X2 LCD to show status and temperature. (pin D8 - D13). Notice that I ignore the contrast control pin? This because this LCD display is an old display that is having problem. :-( so I leave the pin open.<br />
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Unlock button, using Interrupt (pin D2) that will enable the pump and light up the LCD back-light for a period of time. I'm too lazy to built the Debounce module for this button so I use a capacitor :-)<br />
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Outputs (pin D5 and D6) to turn on boiler and warmer thru transistors and relays.<br />
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Buzzer (pin D4) for overheat alert, 1kHz tone.<br />
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<br />
<br />
Complete schematic diagram<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZzMpWE_uGF3ZN6R354LXw_57mDF8fNW3i7vzmRZLzK12bZ_dh8Xwzr9AMFuItFya_o1gwbu_ztxEOgi07GBf3-q1QnZyQovOLO8CuF4BDfcTRHd7YHQCK8ijRBZ5DcfPnXwyOpg/s1600/Sketch_schem.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="225" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZzMpWE_uGF3ZN6R354LXw_57mDF8fNW3i7vzmRZLzK12bZ_dh8Xwzr9AMFuItFya_o1gwbu_ztxEOgi07GBf3-q1QnZyQovOLO8CuF4BDfcTRHd7YHQCK8ijRBZ5DcfPnXwyOpg/s320/Sketch_schem.png" width="320" /></a></div>
<br />
Flow chart below would explain the system flow.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhR0cjY8e9fWkeKvxYmMzmAzvyfNbU6IGuaxUPv6VeFKt4IqaDN9_lK95qMo3fZKmZ5oIMszjQ-FZvDLkfQRzc4RvYcHkPlU8yCU1jKYkKOghDCjj5zSOCNZtonSl8b3RJgghkJVQ/s1600/arduino_prj.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="230" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhR0cjY8e9fWkeKvxYmMzmAzvyfNbU6IGuaxUPv6VeFKt4IqaDN9_lK95qMo3fZKmZ5oIMszjQ-FZvDLkfQRzc4RvYcHkPlU8yCU1jKYkKOghDCjj5zSOCNZtonSl8b3RJgghkJVQ/s320/arduino_prj.png" width="320" /></a></div>
<br />
Complete Arduino sketch<br />
<br />
<pre class="brush: cpp">#include <LiquidCrystal.h>
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);
int sensorPin = A0; //temp sensor analog in pin
int samplingRate = 500; //sampling/pulse rate
int unlockInt = 0; //interrupt value not pin
int unlockTimer = 10000; //unlocked timer in msec
int unlockTimerCount = 0;
int lcdBackLightPin = 7; //lcd backlight signal pin
int lcdBackLightState = LOW; //lcd initial state
int warmerPin = 5; //warmer signal pin
int boilerPin = 6; //boiler signal pin
boolean boiling = false;
int boiledTimer = 10000; //in msec
int boiledTimerCount = 0;
int warmLowLimit = 80;
int warmHiLimit = 85;
int reboilTemp = 65;
int boiledTemp = 95;
int emcyTemp = 105;
int buzzerPin = 4;
int buzzerFreq = 500;
void setup() {
//Serial.begin(9600);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print("Temp =");
//set up unlock int pin
attachInterrupt(unlockInt, unlock, RISING);
//set lcd backlight signal pin
pinMode(lcdBackLightPin, OUTPUT);
//set warmer & boiler pin
pinMode(warmerPin, OUTPUT);
pinMode(boilerPin, OUTPUT);
pinMode(buzzerPin, OUTPUT);
}
void loop() {
float temp = getTemp(analogRead(sensorPin));
//Serial.println(temp);
printTemp(temp);
checkUnlock();
heatingFunc(temp);
checkOverHeat(temp);
delay(samplingRate);
}
void checkOverHeat(float localTemp){
if(localTemp >= emcyTemp){
int buzzerPinState = LOW;
digitalWrite(boilerPin, LOW);
digitalWrite(warmerPin, LOW);
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("Overheat!!!");
while(true){
digitalWrite(buzzerPin, buzzerPinState);
delayMicroseconds(buzzerFreq);
buzzerPinState = !buzzerPinState;
}
}
}
void heatingFunc(float localTemp){
if(!boiling){
if(localTemp < reboilTemp){
boiling = true;
boiledTimerCount = boiledTimer;
digitalWrite(boilerPin, HIGH);
digitalWrite(warmerPin, LOW);
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("Boiler ON");
}else if(localTemp < warmLowLimit){
digitalWrite(warmerPin, HIGH);
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("Warmer ON");
}else if(localTemp > warmHiLimit){
digitalWrite(warmerPin, LOW);
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("Warmer OFF");
}
}else{
if(localTemp > boiledTemp){
boiledTimerCount = boiledTimerCount - samplingRate;
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("95");
lcd.print((char)223);
lcd.print("C hitted");
}
if(boiledTimerCount <= 0){
digitalWrite(boilerPin, LOW);
boiling = false;
lcdClearLine(1);
lcd.setCursor(0, 1);
lcd.print("Boiler OFF");
}
}
}
void lcdClearLine(int lineNo){
lcd.setCursor(0, lineNo);
lcd.print(" ");
}
void checkUnlock(){
if(lcdBackLightState == HIGH){
unlockTimerCount = unlockTimerCount - samplingRate;
if(unlockTimerCount <= 0){
lcdBackLightState = LOW;
digitalWrite(lcdBackLightPin, lcdBackLightState);
}
}
}
void unlock(){
lcdBackLightState = HIGH;
unlockTimerCount = unlockTimer;
digitalWrite(lcdBackLightPin, lcdBackLightState);
}
float getTemp(int sensorValue){
float y1 = 100;
float x1 = 594;
float y2 = 33;
float x2 = 116;
float m = (y1 - y2) / (x1 - x2);
float c = y1 - (m * x1);
return (m * sensorValue) + c;
}
void printTemp(float localTemp){
//clear last 10 char
lcd.setCursor(6, 0);
lcd.print(" ");
if(localTemp>99){
lcd.setCursor(8, 0);
}
else if(localTemp>9){
lcd.setCursor(9, 0);
}
else{
lcd.setCursor(10, 0);
}
lcd.print(localTemp);
lcd.print((char)223);
lcd.print("C");
}</pre>
<br />
The flow is quite similar to the original design and other model/brand. Reboil at 65°C, stop boiling several minutes after 95°C, cut off at 105°C. I did salvage an old circuit board from a different model of boiler and found 3 thermostats 65°C, 95°C and 105°C. So I guess all boilers are using the similar flow.<br />
<br />
The final test...<br />
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Next is to built a proper circuit board and put it back together in one piece.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-65951517431658023352012-07-11T22:04:00.002+08:002012-08-25T20:44:37.897+08:00Adding Extra VGA connector to Dell 3400MP ProjectorSince M1-DA to VGA cable is quite expensive, we have decided to add extra connector to our Dell 3400MP Projector so we could just use common male to male VGA cable.<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkiaNAoHJaSOuLsIVxV8zbhg0j8Y16TaDhIqr6_LarSMk3ISGWOMamFBzX1ALHTw4zdv8ZlRXXBp4j08NJfcGK_AKwypBlqQhyphenhyphenIbPfjG27MvKPJHc41KKktNmT_MWDEmqR1-VGGA/s1600/81245a.jpg" imageanchor="1"><img alt="M1-DA to VGA Cable" border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkiaNAoHJaSOuLsIVxV8zbhg0j8Y16TaDhIqr6_LarSMk3ISGWOMamFBzX1ALHTw4zdv8ZlRXXBp4j08NJfcGK_AKwypBlqQhyphenhyphenIbPfjG27MvKPJHc41KKktNmT_MWDEmqR1-VGGA/s200/81245a.jpg" title="M1-DA to VGA Cable" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr9YGSr3tVFRcbW2AXzKxj50XrPZGJh4VVy03bC27kSdmfP5LoaH3ytMjEJrWOAjmjSpTLDH4qNiz5qTmM6XYaiNR24jsC-W_D9p0p7iNPjINxnZyayljsDC9l05dtapuDJlcoQw/s1600/9.jpg" imageanchor="1"><img alt="M1-DA to VGA Cable" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr9YGSr3tVFRcbW2AXzKxj50XrPZGJh4VVy03bC27kSdmfP5LoaH3ytMjEJrWOAjmjSpTLDH4qNiz5qTmM6XYaiNR24jsC-W_D9p0p7iNPjINxnZyayljsDC9l05dtapuDJlcoQw/s200/9.jpg" title="M1-DA to VGA Cable" width="200" /></a><br />
<br />
1st thing to do is to know the connector pin-out. For <a href="http://en.wikipedia.org/wiki/VGA_connector">VGA connector</a> we have 15-pin connector.<br />
Cable = MALE and Projector = FEMALE.<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjueefbh7fop1CG4vIrNm7L2HnbjMDGK5FoI3q_semEx_MfE_oq83vSV1uPOjG60WKxkZZc1es-P2VHj9Fex6WueFR8OU9soI0FqMmJBKkm8JMniMalfNC-Hbi7qGNAmklKXhyyvg/s1600/VGA_connector_PNr%25C2%25B00052.jpg" imageanchor="1"><img alt="D15 Female VGA" border="0" height="74" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjueefbh7fop1CG4vIrNm7L2HnbjMDGK5FoI3q_semEx_MfE_oq83vSV1uPOjG60WKxkZZc1es-P2VHj9Fex6WueFR8OU9soI0FqMmJBKkm8JMniMalfNC-Hbi7qGNAmklKXhyyvg/s200/VGA_connector_PNr%25C2%25B00052.jpg" title="D15 Female VGA" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg81myJis2nYuPD0xSFJ6avC6_hg_JDnEdCBOFs6KojA9cXAnJ3Z9fOpXWL5mMxxov_TQHNghEK9PpBfjCS2lSHWk7jyjAh4PhIr1T4Tt9c75HUNAFeSQBA6N51wPobDmk89QMgag/s1600/images.jpg" imageanchor="1"><img alt="D15 Male VGA" border="0" height="137" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg81myJis2nYuPD0xSFJ6avC6_hg_JDnEdCBOFs6KojA9cXAnJ3Z9fOpXWL5mMxxov_TQHNghEK9PpBfjCS2lSHWk7jyjAh4PhIr1T4Tt9c75HUNAFeSQBA6N51wPobDmk89QMgag/s200/images.jpg" title="D15 Male VGA" width="191" /></a><br />
<br />
Next, the M1-A connector (<a href="http://en.wikipedia.org/wiki/VESA_Plug_and_Display">AKA M1-P&D Plug</a>) A lot of pin. :-)<br />
Cable = MALE and Projector = FEMALE.<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCvqhjpDWeCk2S_R_hX2A59vuFEOS-zjfb5jHQeJ-BvDzLZIKjjnJ9qyxaCJmHxI1T5FWudF75tb54DWea1LoXjSwtJRbp7ICVW_9WWdEtHYSxmNy9wdHHZWEr0p_FVTAXP_9CQQ/s1600/microcross35m.gif" imageanchor="1"><img alt="M1 male" border="0" height="65" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCvqhjpDWeCk2S_R_hX2A59vuFEOS-zjfb5jHQeJ-BvDzLZIKjjnJ9qyxaCJmHxI1T5FWudF75tb54DWea1LoXjSwtJRbp7ICVW_9WWdEtHYSxmNy9wdHHZWEr0p_FVTAXP_9CQQ/s200/microcross35m.gif" title="M1 male" width="171" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7zcFb1EO2Pqk_kUv61uXz3Sfs_tlr_-UZfSqogWODCPuISfUzPyseZRdpWyYYSbZuDVh5m0bb5VIdOgWBeycyf8YiT1bIt64IMNCHRL1MGjpW74kKwo1XxtqIMFSWkXHpcBqpcA/s1600/microcross35f.gif" imageanchor="1"><img alt="M1 female" border="0" height="65" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7zcFb1EO2Pqk_kUv61uXz3Sfs_tlr_-UZfSqogWODCPuISfUzPyseZRdpWyYYSbZuDVh5m0bb5VIdOgWBeycyf8YiT1bIt64IMNCHRL1MGjpW74kKwo1XxtqIMFSWkXHpcBqpcA/s200/microcross35f.gif" title="M1 female" width="171" /></a><br />
<br />
Internet research tell me that only 7 connections are needed in order to make this work as below<br />
<br />
<style>
#wiringTable{
width:100%;
border-collapse:collapse;
}
#wiringTable td{
border:1px solid grey;
text-align:center;
}
</style><br />
<table id="wiringTable"><tbody>
<tr> <td></td> <td><br />
><img border="0" height="137" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg81myJis2nYuPD0xSFJ6avC6_hg_JDnEdCBOFs6KojA9cXAnJ3Z9fOpXWL5mMxxov_TQHNghEK9PpBfjCS2lSHWk7jyjAh4PhIr1T4Tt9c75HUNAFeSQBA6N51wPobDmk89QMgag/s200/images.jpg" width="191" /></td> <td><br />
<img border="0" height="65" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCvqhjpDWeCk2S_R_hX2A59vuFEOS-zjfb5jHQeJ-BvDzLZIKjjnJ9qyxaCJmHxI1T5FWudF75tb54DWea1LoXjSwtJRbp7ICVW_9WWdEtHYSxmNy9wdHHZWEr0p_FVTAXP_9CQQ/s200/microcross35m.gif" width="171" /></td> </tr>
<tr> <td></td> <td>VGA pin#</td> <td>M1 pin#</td> </tr>
<tr> <td style="color: red;">Red</td> <td>1</td> <td>C1</td> </tr>
<tr> <td style="color: #38761d;">Green</td> <td>2</td> <td>C2</td> </tr>
<tr> <td style="color: blue;">Blue</td> <td>3</td> <td>C4</td> </tr>
<tr> <td>RGB<br />
Ground</td> <td>6,7,8 (join)</td> <td>C5</td> </tr>
<tr> <td>Horizontal<br />
Sync</td> <td>13</td> <td>5</td> </tr>
<tr> <td>Vertical<br />
Sync</td> <td>14</td> <td>6</td> </tr>
<tr> <td>Sync<br />
Ground</td> <td>10</td> <td>4</td> </tr>
</tbody></table>
<br />
Now the hard work begin.... disassembling...<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixi5M_LrVmhHukjJR_hIWtqYlilRhly1n6Es236kWoWgnPIoiZ7z-bEBMZ2q2XmUYMwg4uZes1o_M1DHX84Bb08bF_Z6g_6m7e5bDpa1pvNbO1V3bsA476pocU_tZWXtxpnEE3XQ/s1600/8.jpg" imageanchor="1"><img alt="Top cover removed" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixi5M_LrVmhHukjJR_hIWtqYlilRhly1n6Es236kWoWgnPIoiZ7z-bEBMZ2q2XmUYMwg4uZes1o_M1DHX84Bb08bF_Z6g_6m7e5bDpa1pvNbO1V3bsA476pocU_tZWXtxpnEE3XQ/s200/8.jpg" title="Top cover removed" width="200" /></a><br />
<br />
Soldering...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqMVW0cW8Tc2TimLmFT-MkyhQZz1YfkEmYiLgl_mId7lVX42nTIuvpUETV4E6ANSw5xA11g7dStp02-rBptgFND_CezacARtlJJypRC00-LG_MpuuVNnGIk3J3vc1ZBiRnasycnw/s1600/3.jpg" imageanchor="1"><img alt="Temporary testing setup" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqMVW0cW8Tc2TimLmFT-MkyhQZz1YfkEmYiLgl_mId7lVX42nTIuvpUETV4E6ANSw5xA11g7dStp02-rBptgFND_CezacARtlJJypRC00-LG_MpuuVNnGIk3J3vc1ZBiRnasycnw/s200/3.jpg" title="Temporary testing setup" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0reT_Ga8jYXPADaxUQuX1Or48eqQSPZbaMDkklEUkMdctI_ur4Y8G9LRZEI8g6UZah-TqInRBzXHk3YEEoDdxtPWl1qcLPU80k-6CFjcMvnhmok_6mjj9nafWzsyfeioEiXzhtQ/s1600/4.jpg" imageanchor="1"><img alt="Soldering job, not so neat :-(" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0reT_Ga8jYXPADaxUQuX1Or48eqQSPZbaMDkklEUkMdctI_ur4Y8G9LRZEI8g6UZah-TqInRBzXHk3YEEoDdxtPWl1qcLPU80k-6CFjcMvnhmok_6mjj9nafWzsyfeioEiXzhtQ/s200/4.jpg" title="Soldering job, not so neat :-(" width="200" /></a><br />
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Testing...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmhL6mc4YAee9tvZ5XgN-aXjFtQJLPoqjs1XAni_Y-gO1rTm1rpKEVCzs2dc6ZJAm23xDY1O2mh9aO00B9wrf0vP8KHMBSWQcFEUclIO-GOz9SFmUbN5x4_qxBIJWJk1o3KBtn_Q/s1600/7.jpg" imageanchor="1"><img alt="Testing setup" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmhL6mc4YAee9tvZ5XgN-aXjFtQJLPoqjs1XAni_Y-gO1rTm1rpKEVCzs2dc6ZJAm23xDY1O2mh9aO00B9wrf0vP8KHMBSWQcFEUclIO-GOz9SFmUbN5x4_qxBIJWJk1o3KBtn_Q/s200/7.jpg" title="Testing setup" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXUkO-hDJDCDXHDMJHawzk8bXOxTLPvZwZojzjiCb28KgUUZbXZgsIEcJv-EEqQsat5QFgHR-HlBBn2M2PwKppc3WoaWIoePUqqh8iZl2ZoqItQ52k6e3M42AOUPMjSKlvef6xng/s1600/5.jpg" imageanchor="1"><img alt="Testing setup" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXUkO-hDJDCDXHDMJHawzk8bXOxTLPvZwZojzjiCb28KgUUZbXZgsIEcJv-EEqQsat5QFgHR-HlBBn2M2PwKppc3WoaWIoePUqqh8iZl2ZoqItQ52k6e3M42AOUPMjSKlvef6xng/s200/5.jpg" title="Testing setup" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzXSROwogED8UzxjDSFuIhQA3YPlS7hRKvg3NQscWnESZePFwErYXcX0tP-MDJQIzo9naxNozTHZTA_KNWJJXvernmqq8PZAkLNBYhpA3temu3HDxy2q6RquziM2vAUkNxAT-Upg/s1600/6.jpg" imageanchor="1"><img alt="Testing setup" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzXSROwogED8UzxjDSFuIhQA3YPlS7hRKvg3NQscWnESZePFwErYXcX0tP-MDJQIzo9naxNozTHZTA_KNWJJXvernmqq8PZAkLNBYhpA3temu3HDxy2q6RquziM2vAUkNxAT-Upg/s200/6.jpg" title="Testing setup" width="200" /></a><br />
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Finally, the connector cut-out through the Dell 3400MP magnesium alloy chassis.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhs_K_T4sVtnXiFyFLNN5BIm7XeHeyid3MXC7es41ND5-upt-YAKdpAJ5KT6kiXggz7cOkzBonxPqB1n60wfujrefNLgZqbX7gayXyDpQuuXHu7TiikvsjHCQArI9iHR3Jf3rmdVQ/s1600/2.jpg" imageanchor="1"><img alt="Magnesium alloy connector cut-out" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhs_K_T4sVtnXiFyFLNN5BIm7XeHeyid3MXC7es41ND5-upt-YAKdpAJ5KT6kiXggz7cOkzBonxPqB1n60wfujrefNLgZqbX7gayXyDpQuuXHu7TiikvsjHCQArI9iHR3Jf3rmdVQ/s200/2.jpg" title="Magnesium alloy connector cut-out" width="200" /></a><br />
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Final test.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbYXqyAVz78oHSXj5WXgHitlCS-CC8xiszT87s8oL0kMFdgEsVrIRIn8fQrslm5XqdPh76R6O8J9Q2nTmHXfOzgjK1EW0uHOA1tNEuWGqsbx-aes9Bddwd47YnnxolyNMGCWf4Lw/s1600/1.jpg" imageanchor="1"><img alt="Final test" border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbYXqyAVz78oHSXj5WXgHitlCS-CC8xiszT87s8oL0kMFdgEsVrIRIn8fQrslm5XqdPh76R6O8J9Q2nTmHXfOzgjK1EW0uHOA1tNEuWGqsbx-aes9Bddwd47YnnxolyNMGCWf4Lw/s200/1.jpg" title="Final test" width="200" /></a><br />
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<br />leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com2tag:blogger.com,1999:blog-25608005.post-5451076464984672192011-07-31T17:45:00.001+08:002013-03-22T21:58:05.191+08:00Troubleshooting Remote Controlled Ceiling FanLast week, I came across 2 different model same brand dead ceiling fan. Both models are remote controlled model. Symptom quite similar. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTXZpkX3WWb3v7lyKeNzFF2DQ29FMkkQ0E1puY-zlZOvUz_ivhLp7VJ9kkLFgswrxj4y5Ry7c4BvEkxFRy5AehOmneFhjJkOLRcCyS-iIH5smMeQ9NXmyxpF8BTPdcgXx8QNfH-A/s1600/7speed.jpg" imageanchor="1"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTXZpkX3WWb3v7lyKeNzFF2DQ29FMkkQ0E1puY-zlZOvUz_ivhLp7VJ9kkLFgswrxj4y5Ry7c4BvEkxFRy5AehOmneFhjJkOLRcCyS-iIH5smMeQ9NXmyxpF8BTPdcgXx8QNfH-A/s400/7speed.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTQ1CAiVCNq761DySInwm6Asp6CbNv-5_lOOKKP4lM8aQVmgUo7Dpe1QwFGvgHOrC74thRKciYOQdplhjZA4Cq6iVzriDaiM0J0tuBOs1LwtQtFeJ2ZoqKRlsHLpJOnIz2kzn96g/s1600/3speed.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTQ1CAiVCNq761DySInwm6Asp6CbNv-5_lOOKKP4lM8aQVmgUo7Dpe1QwFGvgHOrC74thRKciYOQdplhjZA4Cq6iVzriDaiM0J0tuBOs1LwtQtFeJ2ZoqKRlsHLpJOnIz2kzn96g/s400/3speed.jpg" /></a></div><br />
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The first model comes with 7 speed but I can only see only 5 TRIACs on the board. Not sure how it works. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpDe0OGMA7p8-Ig4gBwVW9VvEB_LocSqTaih7N-tzKZ_c5TBoOXyhkhibkDHvKpUfqcsrQ39hALm61gnuqa4T5yQLNVvoxbN0czwL6xPFLYwniJjybxg8YhyjZ-Vp3cYjRW3JoEw/s1600/5triacs.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpDe0OGMA7p8-Ig4gBwVW9VvEB_LocSqTaih7N-tzKZ_c5TBoOXyhkhibkDHvKpUfqcsrQ39hALm61gnuqa4T5yQLNVvoxbN0czwL6xPFLYwniJjybxg8YhyjZ-Vp3cYjRW3JoEw/s400/5triacs.jpg" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKeaQIoR41_smsgL0ygWxEnHehU-cW7t_gaLTpc9LUdbeczsdb9rEy2hiHEmV4YCsj_BkpyWlgrgIdqp21HKJUKSTH1ocU_26Y6QpEuKlg6p6KWEk-IeIQYvBsri59_F6t_FO0fA/s1600/7speed2.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKeaQIoR41_smsgL0ygWxEnHehU-cW7t_gaLTpc9LUdbeczsdb9rEy2hiHEmV4YCsj_BkpyWlgrgIdqp21HKJUKSTH1ocU_26Y6QpEuKlg6p6KWEk-IeIQYvBsri59_F6t_FO0fA/s400/7speed2.jpg" /></a></div><br />
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Meanwhile the second model comes with 3 speed and 3 TRIACs available on the board. I assume 1 TRIAC for 1 speed. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5uw8PCMDzHn80BrPC9IrB0PHYXK1BehdU4N8yVyhiUCfN-z9AsYNFYLaRlRNxkxrR0mnl6mcUMPi0aLKpB518xIN4cwwx_6WZJVH5BVxOZ88jtmf71yuPUTcHCa3iu0SsVzlMBg/s1600/3triacs.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5uw8PCMDzHn80BrPC9IrB0PHYXK1BehdU4N8yVyhiUCfN-z9AsYNFYLaRlRNxkxrR0mnl6mcUMPi0aLKpB518xIN4cwwx_6WZJVH5BVxOZ88jtmf71yuPUTcHCa3iu0SsVzlMBg/s400/3triacs.jpg" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcqFr-WPCQRcJC3SA-Y8h296x3vZ-Lv9A4WVf0UnW8-iHZDcRwPYiFbTAgKYvj-_4RSrmi7H7RsB4FZtdKaxWZv47ovwEDdu6kx1Y0CnK6g-DNJZ3NmmIiMOqZtNaVdAPFWMvGBw/s1600/3triacs2.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcqFr-WPCQRcJC3SA-Y8h296x3vZ-Lv9A4WVf0UnW8-iHZDcRwPYiFbTAgKYvj-_4RSrmi7H7RsB4FZtdKaxWZv47ovwEDdu6kx1Y0CnK6g-DNJZ3NmmIiMOqZtNaVdAPFWMvGBw/s400/3triacs2.jpg" /></a></div><br />
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While troubleshooting they look like their µC don't have enough power to start. The buzzer give something like repeating click sound. I did measure the µC Vdd/Vss and found out that the voltage is less than 5V. <br />
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After a quick search at Google, lead me to <a href="http://blog.aztronics.com/?p=207">aztronics</a> . Similar symptom. So I give them a try. <br />
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Desolder the capacitor and measure. Binggo! All caps (regulator part) value is less than they should be. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRaa01okrWFiCr87uS2mVFSBULDwCsbEjUft8YaZ0nAzy5XFrzI4CFRrgj00BVcOtDgRPDodH5og61wvB7bHhCBz_Y6_JHyuwk0LcikPpu5m59hFEm5XAm_unI6FGnZGH3zJkdHA/s1600/desolder_cap.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRaa01okrWFiCr87uS2mVFSBULDwCsbEjUft8YaZ0nAzy5XFrzI4CFRrgj00BVcOtDgRPDodH5og61wvB7bHhCBz_Y6_JHyuwk0LcikPpu5m59hFEm5XAm_unI6FGnZGH3zJkdHA/s400/desolder_cap.jpg" /></a></div><br />
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Replace them all and test with a smaller vent fan. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3P1dHr0MU_bbuyjBVVCBKxsYbcM7T8CI84KZMq6WZbgSfyzk6AuqW5NiFKOjKQYh0DscCTM9sgKuitxueoCTePE4NzkXrrasz0exYyXlHdnaKx5Guqn5kQGEF4H4Bb6m5BSXPLw/s1600/test2.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3P1dHr0MU_bbuyjBVVCBKxsYbcM7T8CI84KZMq6WZbgSfyzk6AuqW5NiFKOjKQYh0DscCTM9sgKuitxueoCTePE4NzkXrrasz0exYyXlHdnaKx5Guqn5kQGEF4H4Bb6m5BSXPLw/s400/test2.jpg" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtFMiuxyiZFM_YWKkld6gezbefaT65IShhcn4QtJ7DwHryzCunEosx4lBoIWXAfUZbPSQt2BCHGxea1dJJ5Ocr2oZ32XlWJgRldDNc-ir991Mjj2ttPD8rnUD2uZEdb9OdC-036w/s1600/test1.jpg" imageanchor="1" style=""><img border="0" height="300" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtFMiuxyiZFM_YWKkld6gezbefaT65IShhcn4QtJ7DwHryzCunEosx4lBoIWXAfUZbPSQt2BCHGxea1dJJ5Ocr2oZ32XlWJgRldDNc-ir991Mjj2ttPD8rnUD2uZEdb9OdC-036w/s400/test1.jpg" /></a></div><br />
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Done and pass them back to their owner to test with the their ceiling fan motor.<br />
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<hr />22nd Mar 2013, another board coming in. Same thing. µC powering problem.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfkkCeU45kMz1GKOcNr1Am46pfyYlPy5k9vYfd1Kde2Rw91gG5sXmofbiBx2szHv7Am6h0AG3m66XysXXMtTB7ndqC1CQYxQjuBYSxrHhJ4VrxS-pkpyjFR2Z4ItJ11ZbjSUSaqA/s1600/my143_panasonic.jpg" imageanchor="1" ><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfkkCeU45kMz1GKOcNr1Am46pfyYlPy5k9vYfd1Kde2Rw91gG5sXmofbiBx2szHv7Am6h0AG3m66XysXXMtTB7ndqC1CQYxQjuBYSxrHhJ4VrxS-pkpyjFR2Z4ItJ11ZbjSUSaqA/s320/my143_panasonic.jpg" /></a><br />
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Replace both caps solve the issue. It looks most of the ceiling fan across diff brand are having similar issue.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com7tag:blogger.com,1999:blog-25608005.post-57511235196474585702009-12-29T23:41:00.011+08:002009-12-30T00:26:28.696+08:00HP TX1000 Entertainment Tablet PC GPU FixA friend of mine ask for a favor to take a look at his HP TX1000 Entertainment Tablet PC blackout LCD problem. I have no idea on how to fix this until I found below video.
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<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/ctHTF3oNdxI&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/ctHTF3oNdxI&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
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Instead of using bulb, I used a heat blower to re-flow the chip.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhra0aGk2QScxrUVoZecqr03vjvAx_EJSz_uDOmxmELmiUdJEPv_jcenzPa4n4ThFO1-X3ArtvxpUnWJYWpS3tdeeb7xJchiuEHCjqsuUPMBzFmYQD67WVVIj5Hmc2g8M-7PR1fVQ/s1600-h/blower.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhra0aGk2QScxrUVoZecqr03vjvAx_EJSz_uDOmxmELmiUdJEPv_jcenzPa4n4ThFO1-X3ArtvxpUnWJYWpS3tdeeb7xJchiuEHCjqsuUPMBzFmYQD67WVVIj5Hmc2g8M-7PR1fVQ/s200/blower.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5420690200586102770" /></a>
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From my observation, there is a the gap between the GPU and the heat sink was join by a burned thermal conductive silicone sponge.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNztmGyIWXoSegm_KW-wiRnO-JDbWbR7xRPmO0vVW4lxi2PDiRjDhIAvZ38yBWlJY1oAUfxe156elfYCO2KrnyUV5QdglDkeo_lumhej88JviBFMDYWo4RTu-dm8Uwe1m63jTlPQ/s1600-h/al_foil.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNztmGyIWXoSegm_KW-wiRnO-JDbWbR7xRPmO0vVW4lxi2PDiRjDhIAvZ38yBWlJY1oAUfxe156elfYCO2KrnyUV5QdglDkeo_lumhej88JviBFMDYWo4RTu-dm8Uwe1m63jTlPQ/s200/al_foil.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5420691239019313362" /></a>
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I replace this with an aluminum foil folded a couple of times to get just the right thickness.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49xjUryTry3zdXiweaRRtyfD5rK2WlxmhSB59X7me1omYhEgNvctJzhP9YRzAO-cJloMaUdsfonHvgZ5zvUsoc_5IdvT8iSXmzIcmxxEDlhmln88KjXftxQb34qTi0Tg4RQRfXw/s1600-h/done2.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49xjUryTry3zdXiweaRRtyfD5rK2WlxmhSB59X7me1omYhEgNvctJzhP9YRzAO-cJloMaUdsfonHvgZ5zvUsoc_5IdvT8iSXmzIcmxxEDlhmln88KjXftxQb34qTi0Tg4RQRfXw/s200/done2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5420692139621446354" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipgQywQsyfgUmIHzxZ5xTpHVd6SqNqRnaRDsJQlSA9_q_5MUo0iFf7T5u8DXh9bvb_soPFcnfMd4oKJuP6muVhunl6BPDBqJLpAcYLa__idMkEaq0G0mFPv7-Dk9urQforrgv55Q/s1600-h/done1.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipgQywQsyfgUmIHzxZ5xTpHVd6SqNqRnaRDsJQlSA9_q_5MUo0iFf7T5u8DXh9bvb_soPFcnfMd4oKJuP6muVhunl6BPDBqJLpAcYLa__idMkEaq0G0mFPv7-Dk9urQforrgv55Q/s200/done1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5420692132454189938" /></a>
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After reassemble it back together and now, the moment of truth, Hey! it works! :-)
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Thanks a lot <a href="http://www.youtube.com/user/jasonshay2">jasonshay2</a>. You really save my day.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com7tag:blogger.com,1999:blog-25608005.post-53763701194551742782009-12-07T23:08:00.040+08:002010-04-19T23:27:16.797+08:00P16PRO40 programmer strip board layoutWhat is P16PRO40? It is a programming tool for several types of PIC micro controller. I'm not sure the origin of it, but I found it here at <a href="http://www.winpicprog.co.uk/">http://www.winpicprog.co.uk/</a> while browsing. The schematic can be found here at <a href="http://www.lpilsley.co.uk/pdf/p16pro40.pdf">http://www.lpilsley.co.uk/pdf/p16pro40.pdf</a>.
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Since I saw a several request for P16PRO40 strip board layout, so I decided to share it here.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYDCGi1MvSzW0silLxvkqiYAcz0F4RaPdRpw049-A9btozmf7fkPghHDHnDkE3y3OswIoB37xfHvZugrya4nJn4fN6PEAW_bXIs00g5zWqwfWzBLm2Ou5K8KADhE1Et43CVdFBxg/s1600-h/sbl.gif"><img style="cursor:pointer; cursor:hand;width: 320px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYDCGi1MvSzW0silLxvkqiYAcz0F4RaPdRpw049-A9btozmf7fkPghHDHnDkE3y3OswIoB37xfHvZugrya4nJn4fN6PEAW_bXIs00g5zWqwfWzBLm2Ou5K8KADhE1Et43CVdFBxg/s320/sbl.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5412532819089500418" /></a>
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My PIC programming tool is a strip board based (AKA Veroboard). It is not as compact & neat as the commercial programmer but guess what, It took only 2 hours for me to built it from my electronic junkyard, except the 74LS05 and of course the strip board it self. Use normal IC socket if you don't have a ZIF socket.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmHhfsnMYFpmkI65eQgYPcbEUPNxr36-BW4KJKCf-7UbkRbd6fwMDMjnQJPh70yqi276ZK8CggXLJnfDuPkDUgyMkXeEXnosRBOoz8X-4WUzSBG_UhQXIzkPMX_DgyUyKpRGBWKA/s1600-h/pp2.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmHhfsnMYFpmkI65eQgYPcbEUPNxr36-BW4KJKCf-7UbkRbd6fwMDMjnQJPh70yqi276ZK8CggXLJnfDuPkDUgyMkXeEXnosRBOoz8X-4WUzSBG_UhQXIzkPMX_DgyUyKpRGBWKA/s200/pp2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5412833540687120514" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhU4IiVFbyqO7lALpBlf0vKXNKZRXnvmunq3y8fQXC6_D1qqUyxia5T2GPUQx7SM0jUaWEdpbJNPgpSu2jMMdIoIxPLtu5fab44dYgD8IR8th4c89PcVjRRtAXnPH9VZyhQzlJoqg/s1600-h/pp1.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhU4IiVFbyqO7lALpBlf0vKXNKZRXnvmunq3y8fQXC6_D1qqUyxia5T2GPUQx7SM0jUaWEdpbJNPgpSu2jMMdIoIxPLtu5fab44dYgD8IR8th4c89PcVjRRtAXnPH9VZyhQzlJoqg/s200/pp1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5412833535334962530" /></a>
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I have made some modification to the circuit to match what I can find on my electronic junkyard. I replaced BC557 with A1015 (PNP), note that both transistor don't share the same pin layout. Just be careful if you want to use the alternative transistor.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinm-ZJLrfEP5nOvQ3w-ws1nNQR-dMmKjSvLFLJwMOzumT9FCD7IZ1NdXWRxnaBclqG139i7p_H9CEJX9R5WGvh8hwcVGdOnDg2R_UdjWA30G79hGV0v0UW-3-lXgzazEYW9dH6Kw/s1600-h/bc557.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 153px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinm-ZJLrfEP5nOvQ3w-ws1nNQR-dMmKjSvLFLJwMOzumT9FCD7IZ1NdXWRxnaBclqG139i7p_H9CEJX9R5WGvh8hwcVGdOnDg2R_UdjWA30G79hGV0v0UW-3-lXgzazEYW9dH6Kw/s200/bc557.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5412522596253854562" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbgltanNc7QQEo304Ao5JOJjpAXxrQS3h77g-hLpazE4eE2nnrz500NprKziQDwP7DMAYw9hl5aFo4Fk1sBM6O1BGATRST75kTn64pXiqS-J4RUrldlmL6wXzBHffWJ5CzZ7vXQw/s1600-h/a1015.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 156px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbgltanNc7QQEo304Ao5JOJjpAXxrQS3h77g-hLpazE4eE2nnrz500NprKziQDwP7DMAYw9hl5aFo4Fk1sBM6O1BGATRST75kTn64pXiqS-J4RUrldlmL6wXzBHffWJ5CzZ7vXQw/s200/a1015.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5412521997176153314" /></a>
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On the power supply circuit, I've remove 7808 regulator since I already have <a href="http://leoricksimon.blogspot.com/2006/04/lab-power-supply.html">13V power supply</a>. I only use 7805 to produce the 5V Vcc and the 13V Vpp comes directly from the main power supply.
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I've also remove Vpp40 on/off from my PIC programmer. I've no plan to use them in the near future.
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The programmer has been tested to work with 16F84A & 16F628A.
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The recommended software for this programmer is WinPicProg 1.91 from <a href="http://www.winpicprog.co.uk/">http://www.winpicprog.co.uk/</a>. It is simple but reliable software for PIC programming.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgv_lhO6x5hLi_shKVd6_WX9G5NdIgJBBB0E0W2kpFf4MG3bCOrqlAKhqp3DVCUWaJrV1Kyx2tq2LRvVdvfQLWmw2GQzIHNjce0fBLATvmFvlxHI11QRdPHDZrHA4HNkiI-Y8D7NA/s1600-h/ScreenHunter_03+Dec.+08+00.08.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgv_lhO6x5hLi_shKVd6_WX9G5NdIgJBBB0E0W2kpFf4MG3bCOrqlAKhqp3DVCUWaJrV1Kyx2tq2LRvVdvfQLWmw2GQzIHNjce0fBLATvmFvlxHI11QRdPHDZrHA4HNkiI-Y8D7NA/s200/ScreenHunter_03+Dec.+08+00.08.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5412526859455955362" /></a>
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If you are using 74LS05 or 74LS06, set your 'hardware' setting as below. They are both HEX Inverter Open Collector output ICs but 74LS06 has extra features = with Buffer/Driver and 30V output.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCeZ9itj0Nqi5qRfcXdRlgn6Gx7YrkBsyVKZ4si_TDzzbbNlev0YY7ElEupEqjpZrKFPU7YoiueCyK44UqfwPzCTnuOH6XpwYXL_Jp1GgoZFgmsOIk9j69hPsNFL_wRmC0BRw8ow/s1600-h/ScreenHunter_02+Dec.+08+00.07.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 112px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCeZ9itj0Nqi5qRfcXdRlgn6Gx7YrkBsyVKZ4si_TDzzbbNlev0YY7ElEupEqjpZrKFPU7YoiueCyK44UqfwPzCTnuOH6XpwYXL_Jp1GgoZFgmsOIk9j69hPsNFL_wRmC0BRw8ow/s200/ScreenHunter_02+Dec.+08+00.07.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5412526856144198306" /></a>
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Below is my test circuit, just a simple blinking program to test it out.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGRDl3yweFWtkQ0W768xcCmCVX4YTUJkmFFmcqCRq_9yVkZOexpLsp8ZxZbn5jXY42LfdfBbBwCYcMRwzHOXwlXi3DfnzaBxNncNTL85hbxW_DfBLla6pVg-PIig8-y0JAmsUSbw/s1600-h/testc2.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGRDl3yweFWtkQ0W768xcCmCVX4YTUJkmFFmcqCRq_9yVkZOexpLsp8ZxZbn5jXY42LfdfBbBwCYcMRwzHOXwlXi3DfnzaBxNncNTL85hbxW_DfBLla6pVg-PIig8-y0JAmsUSbw/s200/testc2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5412832457339965074" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheKR15cWUxtXupjKLBonWfA8qJnjApTM_f5LRGAuoQVc7QMHWt8vcmMBiCN3xkmG9yLFHkwkcnUKe439rQ5J-vgr8QXhqKlTdRnv9WDk71P9mPI5htVmusAL8XAtw-1p5-dyVCTA/s1600-h/testc1.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheKR15cWUxtXupjKLBonWfA8qJnjApTM_f5LRGAuoQVc7QMHWt8vcmMBiCN3xkmG9yLFHkwkcnUKe439rQ5J-vgr8QXhqKlTdRnv9WDk71P9mPI5htVmusAL8XAtw-1p5-dyVCTA/s200/testc1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5412832457068704034" /></a>
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Additional images ...
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEis0VxAbtCjzVqh0Jk9POnsUOJyUAOMihtsvG_JHkDupus1Bvoa8na5D-UYJePEFzM6slEe5R8LUjjRKUsYmq47RwUGjzt51y9kpFSjdm7pEq3bnqmaWmqUJRGKzU50VOLdxwqGjw/s1600/DSC02198.JPG"><img style="cursor:pointer; cursor:hand;width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEis0VxAbtCjzVqh0Jk9POnsUOJyUAOMihtsvG_JHkDupus1Bvoa8na5D-UYJePEFzM6slEe5R8LUjjRKUsYmq47RwUGjzt51y9kpFSjdm7pEq3bnqmaWmqUJRGKzU50VOLdxwqGjw/s400/DSC02198.JPG" border="0" alt=""id="BLOGGER_PHOTO_ID_5461869958108184722" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwTAZE7bbXeMkp9VG2VVJoy8yW7I6b4bo1kJ2dZaZeeDacXoz_SJhzpcQvz-njXGGtcg8wSR7MJDYWniXGe1JZjEiDd2eaA6XwhZifg0SwkyOv2gNvfa1lZasbkL2UqJNCK3BB7g/s1600/DSC02197.JPG"><img style="cursor:pointer; cursor:hand;width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwTAZE7bbXeMkp9VG2VVJoy8yW7I6b4bo1kJ2dZaZeeDacXoz_SJhzpcQvz-njXGGtcg8wSR7MJDYWniXGe1JZjEiDd2eaA6XwhZifg0SwkyOv2gNvfa1lZasbkL2UqJNCK3BB7g/s400/DSC02197.JPG" border="0" alt=""id="BLOGGER_PHOTO_ID_5461869947157528898" /></a>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com7tag:blogger.com,1999:blog-25608005.post-30752186608050336032008-12-23T21:00:00.012+08:002008-12-23T21:23:42.990+08:00Fixing a Mouse Double Click ProblemsHave you ever experience a bad optical mouse? It went double click action whenever you did a single click action? At first, I try to Google for answer but none of them help. I’ve tried every combination of settings but the problem doesn’t go away. I really suspected there must be something wrong with the circuit. After I made a conclusion that it is a mechanical related issue (maybe the switch it self), I replace the switch from an old mouse available.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdhdbl6Kp84ouiCsz5LrUMN_c1raXo1gK6saDeF_sxHuIDSUb4Q7IOduYbcVUkFMGxqRkJpxaVmfZVO3MUnUwPn5PAJomtwlOJZefU4Mnr0hAK_AWrqzpRsFnAiV_VcqBJnQdkZA/s1600-h/new_switch.jpg"><img style="cursor: pointer; width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdhdbl6Kp84ouiCsz5LrUMN_c1raXo1gK6saDeF_sxHuIDSUb4Q7IOduYbcVUkFMGxqRkJpxaVmfZVO3MUnUwPn5PAJomtwlOJZefU4Mnr0hAK_AWrqzpRsFnAiV_VcqBJnQdkZA/s200/new_switch.jpg" alt="" id="BLOGGER_PHOTO_ID_5282971051541240594" border="0" /></a><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvXcdblP1E7C48KgUXQZhh26n24tw7RWxDRx1uDcLquoDi7vejS_E5COo8YpYRs1MCmhHOVgUD_KnNXmr3AyVuMhh6xW_roHP-LeliqG9tvvQ9o2Jc15jFiiaQnA2DkmIg9tXF4g/s1600-h/sw_installed.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvXcdblP1E7C48KgUXQZhh26n24tw7RWxDRx1uDcLquoDi7vejS_E5COo8YpYRs1MCmhHOVgUD_KnNXmr3AyVuMhh6xW_roHP-LeliqG9tvvQ9o2Jc15jFiiaQnA2DkmIg9tXF4g/s200/sw_installed.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5282972146946413618" /></a>
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Unfortunately the problem is still there. This is dangerous since you might drag a folder by accident and move it into another folder. This problem always happening to a first time touch-pad user with tapping function turned on.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfsuts-C0GQ_C8PUQb741R6oWCVOP5I6jXUty7Hfi_z5aa8OlGzWtesctLPkrcoGwlQXO28aE6LiW0yhAeNc81mpzDDqOr6jwB5m_50N7Y_KkiWpj8I7gme0WxEZ_c0cgGTSF9vw/s1600-h/dsldr_cap.jpg"><img style="cursor: pointer; width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfsuts-C0GQ_C8PUQb741R6oWCVOP5I6jXUty7Hfi_z5aa8OlGzWtesctLPkrcoGwlQXO28aE6LiW0yhAeNc81mpzDDqOr6jwB5m_50N7Y_KkiWpj8I7gme0WxEZ_c0cgGTSF9vw/s200/dsldr_cap.jpg" alt="" id="BLOGGER_PHOTO_ID_5282971455450560162" border="0" /></a>
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So next I’m thinking it maybe related to a noise in the circuit. So without any calculation, I try to salvage a capacitor that l can find from an old circuit board and solder it parallel to the switch.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioY7fnuEumIcR0IxY8YP6cK_4AwjTtwNP6EtRA6Y2duIC_Q6kmW_whtqthkN1m4ShsEUVJgRmlly56-Nzz_EWHLZ8WtwqLwCUd9Wllt-FrTHIZcqSMSGiZ_JBMFvo82on37seZcw/s1600-h/cap_installed.jpg"><img style="cursor: pointer; width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioY7fnuEumIcR0IxY8YP6cK_4AwjTtwNP6EtRA6Y2duIC_Q6kmW_whtqthkN1m4ShsEUVJgRmlly56-Nzz_EWHLZ8WtwqLwCUd9Wllt-FrTHIZcqSMSGiZ_JBMFvo82on37seZcw/s200/cap_installed.jpg" alt="" id="BLOGGER_PHOTO_ID_5282971725750889330" border="0" /></a>
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:-) Now it become “click and hold” for about 10 seconds. The capacitor value that I used to smooth the noise from the circuit is too big causing it to simulate “click and hold”. After measuring the capacitance it shows about 2µF. Too big maybe.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjopWGqn1t6G91k83nC64yyGb07kWIHeE_lfoI96WY1BCp5dVyTYivN3qRNHv2G4FbEfx1bR6igUuvyEJLoMNKG61Dg1dz7zKz7w88NDtencpBvF7ElsQfswddIfKEK28MgtJuPwA/s1600-h/under_testing.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjopWGqn1t6G91k83nC64yyGb07kWIHeE_lfoI96WY1BCp5dVyTYivN3qRNHv2G4FbEfx1bR6igUuvyEJLoMNKG61Dg1dz7zKz7w88NDtencpBvF7ElsQfswddIfKEK28MgtJuPwA/s200/under_testing.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5282972441991954754" /></a>
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Next I try to find a capacitor with quite smaller capacitance value (~2nF). Maybe this will do. So I just replace it.
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<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihQHWggFsCESaNRFId2dCwMiNH8XIw0B9afFZnDdrbN67iErandLrOyAwYm3HWMGPBS_TVyTsOxtd07RzExNZz1qEO_LIv020TNgDJEmUK_Q7AK4gZU5PPB_iUYSMs3_SqpuRFjA/s1600-h/re_assembld.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihQHWggFsCESaNRFId2dCwMiNH8XIw0B9afFZnDdrbN67iErandLrOyAwYm3HWMGPBS_TVyTsOxtd07RzExNZz1qEO_LIv020TNgDJEmUK_Q7AK4gZU5PPB_iUYSMs3_SqpuRFjA/s200/re_assembld.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5282972442745672738" /></a>
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Walla! At last like a brand new mouse looks and feel. Good luck.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com8tag:blogger.com,1999:blog-25608005.post-37958416943524754292007-05-21T21:04:00.003+08:002012-06-11T23:38:07.206+08:00555 Timer-Based Flyback Transformer Driver<object width="425" height="350"> <param name="movie" value="http://youtube.com/v/VdKd9iXjAZo"></param><param name="wmode" value="transparent"></param><embed src="http://youtube.com/v/VdKd9iXjAZo" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> </embed> </object> <br />
My 24kV high voltage "Jacob's Ladder" from DIY flyback transformer driver using 555 timer. <h3>Creating an electric arc</h3>I've always wanted to create an electric arc but don't know how. Then I come across the theory that air breaks down at about 1MV/m (Mega Volts per meter) (24kV/in). That mean you need 1kV in order to get 1mm arc. So you need a higher voltage. One of the method is to use a flyback transformer that can be found from an old TV or an old CRT PC monitor. It could generate about 10 to 30 kV. Other method is to create a "tesla coil" which is quite complicated. Maybe it will become my next project. <h3>Flyback transformer and preparation</h3>Flybacks can be found in all types of monitors and screens that use a cathode ray tube (CRT), e.g. TV sets, computer monitors etc. It has a big red cable with a suction cup. It looks something like below. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKpir9XNlkFH3AAzlQyN0sbOn_dR3arNYwdDODUnXcNyPzxv-QK795i7qJSBNvVOuqnUsUCsDPFQHJgBYDabVlz5FRk70JemU_HvYabmhtBXqclke9R33NTLWZE5t8HP3FBxKSgQ/s1600/flyback_pic_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKpir9XNlkFH3AAzlQyN0sbOn_dR3arNYwdDODUnXcNyPzxv-QK795i7qJSBNvVOuqnUsUCsDPFQHJgBYDabVlz5FRk70JemU_HvYabmhtBXqclke9R33NTLWZE5t8HP3FBxKSgQ/s200/flyback_pic_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560804072326610" /></a> <br />
Next, you need to identify the primary and secondary pin out. Thanks to "<a href="http://jlnlabs.imars.com/lifters/labhvps/tht.htm" title="Lab HV-PS page">Lab HV-PS page</a>" for providing an instruction on how to find the pinout. The main HV out on the secondary coil is a big red cable with a suction cup. Now we need to find the 0V pinout for the secondary coil. The trick is to use a DC power supply. This is because the flyback secondary coil resistance is much too high. There is no way you could find it with ordinary digital multimeter. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiehU8u8Lf6BIMbZ5Jqb-i21_88Qr9N6KCL9-DdEGijZuEjAddqyhJoFYa-lJZRBuLPh2OyczhJAQyEhptWu0enUFWVNmDb4JZk0ddRkE1umxaZRuIl81UuZW81Db7v5VIE-sK8MA/s1600/sec_coil_ohm_02.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiehU8u8Lf6BIMbZ5Jqb-i21_88Qr9N6KCL9-DdEGijZuEjAddqyhJoFYa-lJZRBuLPh2OyczhJAQyEhptWu0enUFWVNmDb4JZk0ddRkE1umxaZRuIl81UuZW81Db7v5VIE-sK8MA/s200/sec_coil_ohm_02.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561425666527778" /></a> <br />
So use your own understanding on the circuit below to find the 0V pinout. Give it about 12V and your meter should show some volts when you find the 0V pinout. For me, just to be safe, try to find a datasheet of the flyback transformer or try to find the TV or old CRT PC monitor service manual/schematics diagram to find the pinout like below. Most modern flybacks include built-in HV rectifier diode(s) and/or voltage multiplier (tripler) so output without additional components will be high voltage positive or somewhat smoothed HV DC. So, make sure your polarity is correct. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2ue3Fj2LxCE8eh4mhrFRihb9FLsuycONQLIESUSiwjfXdR1SVutRPqWrq-KTjvi2EIf0gatHbWzICkfZL6xxkzFAMGXtG7Zxiu6lgDuywGCjBwHZNCbkhzSlgAfCcgufoy_Gw5A/s1600/find_hv_gnd.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 157px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2ue3Fj2LxCE8eh4mhrFRihb9FLsuycONQLIESUSiwjfXdR1SVutRPqWrq-KTjvi2EIf0gatHbWzICkfZL6xxkzFAMGXtG7Zxiu6lgDuywGCjBwHZNCbkhzSlgAfCcgufoy_Gw5A/s200/find_hv_gnd.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560795181780242" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnCnEILXydMp6XGUuv-RHxDa_vmMmEqXA0rC3axbu8KZpGwkGukDQA7b_PgHz1JIs-kLiHvolUoJGCT5Nje9mFei6BUj6Qd7POo606w7_RB5dheVCEMEO31nPu0vKZ4-y3ulFO2g/s1600/sec_coil_ohm_03.jpg"><img style="cursor:pointer; cursor:hand;width: 150px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnCnEILXydMp6XGUuv-RHxDa_vmMmEqXA0rC3axbu8KZpGwkGukDQA7b_PgHz1JIs-kLiHvolUoJGCT5Nje9mFei6BUj6Qd7POo606w7_RB5dheVCEMEO31nPu0vKZ4-y3ulFO2g/s200/sec_coil_ohm_03.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561962717033522" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi6kmY26ZfrTbgAgT_6XSTuOmD5TbSi28vSGXuN2SySZOM3aYH1-rou8MqGZbW-qEFjyxXRJ6sbO0iJ2VFRuYDF-ihXoXjlTk2x1MILCixgdlvQD-vKZeB_ddpObMbG2snxx7UoqQ/s1600/flyback_pinout.gif"><img style="cursor:pointer; cursor:hand;width: 192px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi6kmY26ZfrTbgAgT_6XSTuOmD5TbSi28vSGXuN2SySZOM3aYH1-rou8MqGZbW-qEFjyxXRJ6sbO0iJ2VFRuYDF-ihXoXjlTk2x1MILCixgdlvQD-vKZeB_ddpObMbG2snxx7UoqQ/s200/flyback_pinout.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561408114942690" /></a><br />
Unless you have one of these multimeter, you should get the resistance reading out of it. From my FLUKE 189 multimeter you can see that it shows more than a hundred Mega Ohm. That is why ordinary meter could not measure it because of it's limit. Below I test two types of flybacks with 112 Mega Ohm and the other about 522 Mega Ohm. Again, polarity is critical to get the reading. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAk0d3HK6CI9H_larRjp-DPMXUkjCiNKcYU0usR38RAf0_hSddRTb1yZs6POGBwm_zY8Fzk0IDf8reNsIarBu-8xjvCYqu5N9vG2MASjjB41JbVpLfnKS9SKMPCMfOx77E8rUsmw/s1600/sec_coil_ohm_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAk0d3HK6CI9H_larRjp-DPMXUkjCiNKcYU0usR38RAf0_hSddRTb1yZs6POGBwm_zY8Fzk0IDf8reNsIarBu-8xjvCYqu5N9vG2MASjjB41JbVpLfnKS9SKMPCMfOx77E8rUsmw/s200/sec_coil_ohm_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561420130592962" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjPlKtdDoi9_7f6v9VJ5YWs_mN6mzqKJnljYnQbNJc2IVUIFVnRk3PMQtUqehQw8WIGiBKHzeJYsVrq1dKsL5B4NkPOo6CzJ0osF1ntmg3FAN0NlSZvMtAu4jzTRxCxHh_uOVsmA/s1600/sec_coil_ohm_04.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjPlKtdDoi9_7f6v9VJ5YWs_mN6mzqKJnljYnQbNJc2IVUIFVnRk3PMQtUqehQw8WIGiBKHzeJYsVrq1dKsL5B4NkPOo6CzJ0osF1ntmg3FAN0NlSZvMtAu4jzTRxCxHh_uOVsmA/s200/sec_coil_ohm_04.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561964412809378" /></a> <br />
To find the primary coil is a much simple than the secondary coil. The primary coil resistance is about 1 ohm and again I confirm this with a TV or old CRT PC monitor service manual/schematics diagram. In my case I could only get 0.45 ohm. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFbLWu_OPGLgYmZPfPDyPRTFccPjeHVkuqkSPb8xTBnM7rpYq6C29SZt3oTLCkrd-uM0xMjzCU5_FlnV7jtFoGkKs3eNiPrTomPit6KC6VMZy4HkCkMweANb3oRFDrCfsI6SclKQ/s1600/find_pri_pin.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 157px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFbLWu_OPGLgYmZPfPDyPRTFccPjeHVkuqkSPb8xTBnM7rpYq6C29SZt3oTLCkrd-uM0xMjzCU5_FlnV7jtFoGkKs3eNiPrTomPit6KC6VMZy4HkCkMweANb3oRFDrCfsI6SclKQ/s200/find_pri_pin.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560799118524674" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6CTOYIK-ocztno6p_owM8DAVdOyJm8SwVdd5JRX-huBdmWKdeNcPa-p31bb8r9MXQN1Q5IhXZWNwfzB3DZN7dzTIMHyKa0zBhyphenhyphen2DpL2RncIWgxXdzLd2t2iNeR4nIw0vZBGRQ6Q/s1600/pri_coil_ohm_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6CTOYIK-ocztno6p_owM8DAVdOyJm8SwVdd5JRX-huBdmWKdeNcPa-p31bb8r9MXQN1Q5IhXZWNwfzB3DZN7dzTIMHyKa0zBhyphenhyphen2DpL2RncIWgxXdzLd2t2iNeR4nIw0vZBGRQ6Q/s200/pri_coil_ohm_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561411178664162" /></a> <br />
<h3>Creating the flyback driver (20kHz with 90% duty cycle)</h3>Thanks to "<a href="http://www.electronics-lab.com/projects/misc/016/index.html" title="Jonathan Filippi">Jonathan Filippi</a>" for the idea. My circuit is quite different. I try to fix up the frequency and duty cycle with help from simulation software. I use "Electronic Workbench" to simulate the circuit which can generate about 20kHz with 90% duty cycle and I come out with this. Using 555 timer to generate 20kHz with 90% <a href="http://en.wikipedia.org/wiki/Duty_cycle" title="Duty Cycle on WIKI">duty cycle</a>. Next I try to put it on the breadboard and test the output from it. I get about 18kHz with 85% duty cycle. Jonathan Filippi is using 2N3904 and 2N3906 but I'm using c1815 (npn) and a1015 (pnp). I found out that you can use any multipurpose transistor and I could find it on my old TV board. For the MOSFET, Jonathan Filippi is using IRF840 but I'm using IRF630. You may try to find it's equivalent and experiment with it. Just make sure it is compatible if you want to use other types of MOSFETs. Find it's data sheet and compare the characteristic for both types of components. <br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijiGTlJYUnFJ-JmXzutU97maHywAiIf9vwMkorDHFVCCSXmhDKp46eCMtQWjJglCr0t2pmFKXkOkrykFwQ-ZWuWlOoTaok5bbYKi7RmObwSznDloVqm5dBS4yvfEiYDT3IrHzqQg/s1600/schDuringTesting.png" imageanchor="1" style=""><img border="0" height="96" width="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijiGTlJYUnFJ-JmXzutU97maHywAiIf9vwMkorDHFVCCSXmhDKp46eCMtQWjJglCr0t2pmFKXkOkrykFwQ-ZWuWlOoTaok5bbYKi7RmObwSznDloVqm5dBS4yvfEiYDT3IrHzqQg/s200/schDuringTesting.png" /></a><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGrI-wxbwrTLUZBim5m4LG67VkdR7z6RlPlZotVDBXEv5XvRD0-_AvFguA8wyJyh9aZsxf2hxXxNZmNa1aPAJhSErCRu2PvzW8w_chJ78OvDe7qkMwZH8c1NnDU_Kp5FUD98ZneQ/s1600/bboard_18khz_02.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGrI-wxbwrTLUZBim5m4LG67VkdR7z6RlPlZotVDBXEv5XvRD0-_AvFguA8wyJyh9aZsxf2hxXxNZmNa1aPAJhSErCRu2PvzW8w_chJ78OvDe7qkMwZH8c1NnDU_Kp5FUD98ZneQ/s200/bboard_18khz_02.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560105677741058" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMrdIVupYQ-wc2RCZyRAxX8_1bfDtvqmjRrb6m-D2CpifBVHDB1eu50F1t9lyNnOuKiy9f0N_GNHFgp7F82W1rW2vBzdo0in01QSfLf0uvytQEBM5JEd77Tnonw7qqjoiLsTX5mw/s1600/bboard_18khz_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMrdIVupYQ-wc2RCZyRAxX8_1bfDtvqmjRrb6m-D2CpifBVHDB1eu50F1t9lyNnOuKiy9f0N_GNHFgp7F82W1rW2vBzdo0in01QSfLf0uvytQEBM5JEd77Tnonw7qqjoiLsTX5mw/s200/bboard_18khz_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560100031949010" /></a><br />
Before assemble it, I test this circuit with a small transformer which I can find it on the same old TV board. Since I'm getting too excited, the quick test is to connect the output to the lowest resistance coil. I test it with a limit resistor and surprise, I can get a hundred volt out of that. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPqigtxAYXysMDIqseSNLqaOnR310E9VSKp0cH3j4neEEaOVwa0R0ZeP68AIcNFP2V8cC01xrOFInubnvwwqPtUloPXX1x-m0yP4m6OnQCc5Hlla0vUgrINxS9dp_3MnrbUrzPvw/s1600/bboard_100v_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPqigtxAYXysMDIqseSNLqaOnR310E9VSKp0cH3j4neEEaOVwa0R0ZeP68AIcNFP2V8cC01xrOFInubnvwwqPtUloPXX1x-m0yP4m6OnQCc5Hlla0vUgrINxS9dp_3MnrbUrzPvw/s200/bboard_100v_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560108755644866" /></a> <br />
Next is to plan to transfer it to the stripboard/veroboard. Here is the stripboard layout and the assembled circuit board. Make sure you mount the MOSFET to a heat sink since it going to heat up while running/powering it up. Note that I put the 150 ohm "snubber" resistor and diode near the flyback. This is to suppress ("snub") electrical transients that might damage of the circuit. <br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheoUlP-pnrQgpBKYMtrpntdPA0JQYh_ODWZyuifUkZWBkziirOIRKiG-E81OM8A3EZsRs-b71xY6f4vJ0QBF02R5q3waJaf3fjSlcW6KS35gQiTksMYX0fEXD6QXw1PEYpfits4g/s1600/finalSch.png" imageanchor="1" style=""><img border="0" height="96" width="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheoUlP-pnrQgpBKYMtrpntdPA0JQYh_ODWZyuifUkZWBkziirOIRKiG-E81OM8A3EZsRs-b71xY6f4vJ0QBF02R5q3waJaf3fjSlcW6KS35gQiTksMYX0fEXD6QXw1PEYpfits4g/s200/finalSch.png" /></a><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifxOVb01STGjP1xxLrx_nOMVw0x1q7O9W97uLhK5jBUdukt5q16dEtDZGBKTjVadbxYzcycGTmb1FRagKAQ7JhEpU8f7smtDUPtWc8h85oZckvBCcp_wC2walvsSG39agCRAKnjQ/s1600/schematic.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 86px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifxOVb01STGjP1xxLrx_nOMVw0x1q7O9W97uLhK5jBUdukt5q16dEtDZGBKTjVadbxYzcycGTmb1FRagKAQ7JhEpU8f7smtDUPtWc8h85oZckvBCcp_wC2walvsSG39agCRAKnjQ/s200/schematic.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561417328168818" /></a><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEid9xPjhwCNZ4slHgnrRZRbJd3Ou4OKNnvUPiEzafXpXCVW0kCRm9uba3j-TzOqHNASEWupvIMHgjUz4cPln0ihijRXo2UgR9Pbw3rfUWFBPrlAlo23J_On10GiH8EXfMmypJT_wg/s1600/cb-1.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEid9xPjhwCNZ4slHgnrRZRbJd3Ou4OKNnvUPiEzafXpXCVW0kCRm9uba3j-TzOqHNASEWupvIMHgjUz4cPln0ihijRXo2UgR9Pbw3rfUWFBPrlAlo23J_On10GiH8EXfMmypJT_wg/s200/cb-1.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560123419980114" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQH6JdnLR4Ormg0002sJHTdqrvy7ehqnKNNv5TRV_oKyrx2JW-njiwWeiWb3DnN-uJN14LHhIC9iSRwXpF_csuKH8yp_ra4WvRPwD7myx3yGfkCsNyI_6iwFmwYgnwJZVDnbapnw/s1600/vboard_none_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQH6JdnLR4Ormg0002sJHTdqrvy7ehqnKNNv5TRV_oKyrx2JW-njiwWeiWb3DnN-uJN14LHhIC9iSRwXpF_csuKH8yp_ra4WvRPwD7myx3yGfkCsNyI_6iwFmwYgnwJZVDnbapnw/s200/vboard_none_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406562862022779202" /></a> <br />
Again, I test the assembled circuit board with the same small transformer and I could get a neon to light up. This mean I'm getting about hundred volts. Neon needs about 80V or higher in order to light up. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjd1FfgPjSEGvhYHgH-oow96yEef1P0byrLk1FFYXYVwohynJwYk1q5yx1Ufl65IXN7VkTbYaHNR5rwZbvq8rC5F3ateX6Wi1KejeJycS7iuaqSl2FZknZj74Ryk6g1PSkCCekv9Q/s1600/vboard_100v_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjd1FfgPjSEGvhYHgH-oow96yEef1P0byrLk1FFYXYVwohynJwYk1q5yx1Ufl65IXN7VkTbYaHNR5rwZbvq8rC5F3ateX6Wi1KejeJycS7iuaqSl2FZknZj74Ryk6g1PSkCCekv9Q/s200/vboard_100v_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406562860250527762" /></a> <br />
<h3>Test it out</h3>Now it time to test it out. Get a high power supply for this test. Don't use an expensive lab power supply for this test. It might burn or damage. For me, I'm using a 12V DC battery charger that can give about 5 Amps. You may also try a car battery if you have one. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM1q9VeHJB8uoulzWcOFBtQq0Gq_DhgCzLceK_zV3F6g9cz0Ocm0VDaWkxHd2rKzgg1wt7bn5-douC6_NPfz0B1HqfJOK8BqXhE6iFeAZNgU1oV6siP1AuEktdvL5cZnxrF7X8ew/s1600/test_setup_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM1q9VeHJB8uoulzWcOFBtQq0Gq_DhgCzLceK_zV3F6g9cz0Ocm0VDaWkxHd2rKzgg1wt7bn5-douC6_NPfz0B1HqfJOK8BqXhE6iFeAZNgU1oV6siP1AuEktdvL5cZnxrF7X8ew/s200/test_setup_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406562852195128290" /></a> <br />
There is an arc!. At last, I could get an arc out of it. I try to measure the initial max. length and I could get about 24mm. Thus, it is about 24kV. Remember the theory 1MV/m?. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjI9p6jrpDU_DFv9O1QrDKtAVTwxauIwUGTSAaDoB2cmXAnhOQT5CW7tShE1zknEPpC_I5ezgrQvqPH1UjR1V6xcYRntjqBhHXgNGbRHKDPGKMfiL4TQolCsD1v6-OZM2Ng-NGcpw/s1600/spark_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjI9p6jrpDU_DFv9O1QrDKtAVTwxauIwUGTSAaDoB2cmXAnhOQT5CW7tShE1zknEPpC_I5ezgrQvqPH1UjR1V6xcYRntjqBhHXgNGbRHKDPGKMfiL4TQolCsD1v6-OZM2Ng-NGcpw/s200/spark_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561969965309074" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjuwgs4HByx_nBkKiwmwNJgP4_ot539acCE2ME05jleTbcwacBrlgwps5mX4nfsOGGL7IpGjLr2FXf2JbOx_AvQCBm_HSivVwaRfUu8fPz_KWy3DmJujpg2NsMI-kBjFAD1gHKuDg/s1600/spark_02.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjuwgs4HByx_nBkKiwmwNJgP4_ot539acCE2ME05jleTbcwacBrlgwps5mX4nfsOGGL7IpGjLr2FXf2JbOx_AvQCBm_HSivVwaRfUu8fPz_KWy3DmJujpg2NsMI-kBjFAD1gHKuDg/s200/spark_02.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561974072242290" /></a> <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQ_YqgYQ-ML_G3M_qELZycLrMxiAFPWI_vOBmIfNBUFFIaTFjL5kFJ7e6VOOmKg6bOPiwL6NUtTUCd8tIJjqChGEChXzAiG1QGsQKlhPEfAM5MRgsqh3NFVL72hlCFq8IhU0iumA/s1600/spark_03.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQ_YqgYQ-ML_G3M_qELZycLrMxiAFPWI_vOBmIfNBUFFIaTFjL5kFJ7e6VOOmKg6bOPiwL6NUtTUCd8tIJjqChGEChXzAiG1QGsQKlhPEfAM5MRgsqh3NFVL72hlCFq8IhU0iumA/s200/spark_03.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406561977675904354" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCSCpzS7Ik6VkCEAb4gfk-56d_qpmYAj0M_QB5zJ-aynx6bsUsBB9W7Uuz_4X2zCbdBctgpzFcsI-UwB6_DLY6AeZE08IQF1s-MilD_uxwyu57bK5AB6rEmYbvpz3fsg62nbX5jw/s1600/spark_04.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCSCpzS7Ik6VkCEAb4gfk-56d_qpmYAj0M_QB5zJ-aynx6bsUsBB9W7Uuz_4X2zCbdBctgpzFcsI-UwB6_DLY6AeZE08IQF1s-MilD_uxwyu57bK5AB6rEmYbvpz3fsg62nbX5jw/s200/spark_04.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406562847253587970" /></a><br />
I measure the DC operating current. It is about 5 Amps. I've blown my DC power supply fuse in the process. Maybe I need a bigger power supply :-) . At least I've got some arcs. <br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7uSdXkg0z5Z2UxmMWd3CXMBjMCx6HYOhYVJTWPBcpetySrWHtItowvawIfJa0v1bVsWWrJlWvxqOkOPgHiYzX4GtFVNfVAaGTqScg-3cYFwjLk6hIeMN5bxVHaRpX3h9EGpPF9g/s1600/broken_fuse_01.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7uSdXkg0z5Z2UxmMWd3CXMBjMCx6HYOhYVJTWPBcpetySrWHtItowvawIfJa0v1bVsWWrJlWvxqOkOPgHiYzX4GtFVNfVAaGTqScg-3cYFwjLk6hIeMN5bxVHaRpX3h9EGpPF9g/s200/broken_fuse_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560119177880274" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhA4zusSk81_ULtDSC2LrqtntArBvLNMtyGOlD6688ruRt8XhtWXBfX-vDVt4wp53BGPzXzm3DP2kn3lzSZASrbRzIohmqw0oGfmeOUoRwZJTxnzd9oxmMXSJqbnpNGnegicCKgGQ/s1600/dc_current_01.jpg"><img style="cursor:pointer; cursor:hand;width: 150px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhA4zusSk81_ULtDSC2LrqtntArBvLNMtyGOlD6688ruRt8XhtWXBfX-vDVt4wp53BGPzXzm3DP2kn3lzSZASrbRzIohmqw0oGfmeOUoRwZJTxnzd9oxmMXSJqbnpNGnegicCKgGQ/s200/dc_current_01.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560786536503922" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgirudS9bJ82W19uI4Xva8KgWw10263EA6CT8NHE-KoASmIrydRRla2n9Xc82qesLaC_vi05qInT8VsNScEZCGq3_Zip3fvWfGpeF7m0ArGvEI5zeL3QQVvwzDpCj6hyAYCfhVFHg/s1600/dc_current_02.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgirudS9bJ82W19uI4Xva8KgWw10263EA6CT8NHE-KoASmIrydRRla2n9Xc82qesLaC_vi05qInT8VsNScEZCGq3_Zip3fvWfGpeF7m0ArGvEI5zeL3QQVvwzDpCj6hyAYCfhVFHg/s200/dc_current_02.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406560789131261282" /></a> <br />
<h3>Good luck!</h3>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com41tag:blogger.com,1999:blog-25608005.post-46150757883776562972007-04-06T20:55:00.001+08:002009-11-21T22:07:36.694+08:00Simplest Intercom<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbn_ApjQwHaJ3NxaBtQPQnwHqFA4ifS9ntW1DGJZGb0kuT-sgrJF-uLwGIWaomBfQjhGo15Fnxh_hx93B6oPVJua-tWShLXmBxL2OMRxVtpl_-SCfh2uEzWcrwvEiKPuOtWjFeaw/s1600/schematics.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 58px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbn_ApjQwHaJ3NxaBtQPQnwHqFA4ifS9ntW1DGJZGb0kuT-sgrJF-uLwGIWaomBfQjhGo15Fnxh_hx93B6oPVJua-tWShLXmBxL2OMRxVtpl_-SCfh2uEzWcrwvEiKPuOtWjFeaw/s200/schematics.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406558040964045698" /></a>
<h3>Using old phones</h3>
Using your old phones, you could create personal "micro" telephone exchange as simple as above circuit.
I manage to solder the test circuit less than a minute. Than connect the phone and test it.
It works. So why 39 ohm?
From <a href="http://www.epanorama.net/documents/telecom/telephone_intercom.html" target="_blank" title="Epanorama Dot Net">
Epanorama Dot Net</a>,
the correct value of the resistor should be a resistor that can limit the circuit current around 30mA total loop.
The method is by replacing the resistor in the circuit with a variable resistor, plug in the phones, apply power and tune the current
with the variable resistor so the current flow is 30mA.
After that take out the variable resistor and measure the resistance/ohm across it.
Find the fixed resistor with the nearest ohm reading to it and replace it to the circuit.<br />
<h3>Simplest Circuit</h3>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3DUz2sLnjx3l-i7SFvlkrwgAgwt9CfNPLHEkxQgJyy06RthDj2Fat-cDwnAKEU4dfIMcrtp0nYB-IvB9CeulBq7k8z7alEvK_Mf_VNHHLZOcQvVn7xyYgfge8BvsBIxcJVYqLbg/s1600/wiring.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 174px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3DUz2sLnjx3l-i7SFvlkrwgAgwt9CfNPLHEkxQgJyy06RthDj2Fat-cDwnAKEU4dfIMcrtp0nYB-IvB9CeulBq7k8z7alEvK_Mf_VNHHLZOcQvVn7xyYgfge8BvsBIxcJVYqLbg/s200/wiring.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406558048967780930" /></a>
<h3>Testing In Progress</h3>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjToN-VNTvJLxugEoN3R33aY9Nisk5LmLgNE4G9UkmemwGcHqP0ycFKkkPeOX-AfJeistLQBzKhN8bmp2F_aiaWX-0CfTFGUJSxnd1Igk53gCueqpfZEPPO9jIwqGDOXSHvaxs0Rg/s1600/telephone_test.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 134px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjToN-VNTvJLxugEoN3R33aY9Nisk5LmLgNE4G9UkmemwGcHqP0ycFKkkPeOX-AfJeistLQBzKhN8bmp2F_aiaWX-0CfTFGUJSxnd1Igk53gCueqpfZEPPO9jIwqGDOXSHvaxs0Rg/s200/telephone_test.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406558045683035858" /></a>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com11tag:blogger.com,1999:blog-25608005.post-53048486119992611482007-03-25T01:23:00.006+08:002011-06-09T23:02:46.387+08:00Simple Cable Tester<h3>
Simple DIY Cable Continuity Tester</h3>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3NBjGOdkCyqXGHaIkDHTNOJyyGgq2ojaXhl7qbE83eDW9UXDEhUkfIw0jJoou-rKHnRvMJ8QTXrgei1KfvfUrCb5BkPeWsscxiIQl1eKV60BD_AuJVU6PDaiTKv-VmWZp-gAgUg/s1600/assy.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556267226902210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3NBjGOdkCyqXGHaIkDHTNOJyyGgq2ojaXhl7qbE83eDW9UXDEhUkfIw0jJoou-rKHnRvMJ8QTXrgei1KfvfUrCb5BkPeWsscxiIQl1eKV60BD_AuJVU6PDaiTKv-VmWZp-gAgUg/s200/assy.gif" style="cursor: pointer; height: 124px; width: 200px;" /></a><br />
<h3>
How to use</h3>
This simple cable tester can be used to check 2 wire cable such as coax cable, telephone cable, audio cable and etc.
Power the circuit using 9V battery.
Plug in the cable and push "TEST" button.
The dummy resistor is connected to the end of the cable which has 75ohm resistor inside.
The tester will show only 3 conditions, "SHORT", "OPEN" and "GOOD".
<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoKVLhyphenhyphenavfaJ00ytnjoyXiXG2Lov_DOlcJMtOomYTQ-Bt6VpWH2fyHYrAsYEG44Gxb2V4K06xdNz2uAnLfqDpxhNg0IItYOgfGI5OiMug-krqprTrqDCigA6oXHtA3UvLQ0byMLg/s1600/cable_checker_cct.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556747048544114" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoKVLhyphenhyphenavfaJ00ytnjoyXiXG2Lov_DOlcJMtOomYTQ-Bt6VpWH2fyHYrAsYEG44Gxb2V4K06xdNz2uAnLfqDpxhNg0IItYOgfGI5OiMug-krqprTrqDCigA6oXHtA3UvLQ0byMLg/s200/cable_checker_cct.gif" style="cursor: pointer; height: 102px; width: 200px;" /></a>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNqORs1958S0QS6P-1XpPG-jsnwaLjlCDGWVGzkBmpi90Z4XO7Y3COPkkRsEpqrjt0vjdnHR_PSN7mSTQkncCKArZZrh0ZE5Sr7atLXOtiMTC8NWpcVwfIK0vg2MgcOzVyXsa8IQ/s1600/4011.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556239407516498" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNqORs1958S0QS6P-1XpPG-jsnwaLjlCDGWVGzkBmpi90Z4XO7Y3COPkkRsEpqrjt0vjdnHR_PSN7mSTQkncCKArZZrh0ZE5Sr7atLXOtiMTC8NWpcVwfIK0vg2MgcOzVyXsa8IQ/s200/4011.gif" style="cursor: pointer; height: 169px; width: 200px;" /></a>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkBhtxxRPK0JgUHXK-OimS-2FcwJl9wrTLvTotlzmkPLk_TaA-_8R1N_xUCs9bVd0cwf0FZ3gDkbvb_OLHTXwdiDa0PRog72bdMKhhkgbBywhDCHdaNXdGdv9lk0hrRUDfHgb9wg/s1600/4558.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556251318563314" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkBhtxxRPK0JgUHXK-OimS-2FcwJl9wrTLvTotlzmkPLk_TaA-_8R1N_xUCs9bVd0cwf0FZ3gDkbvb_OLHTXwdiDa0PRog72bdMKhhkgbBywhDCHdaNXdGdv9lk0hrRUDfHgb9wg/s200/4558.gif" style="cursor: pointer; height: 115px; width: 139px;" /></a>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaRwVOaflRuNSbwh92D9HcYOPR9yNrTTAi5fgJfhJ7lcE4aWyYKNTXA-Eiqk27SeVYlJqePeJm1mxNkXJbpkdrEkFiNmTQ_HrpK3R0Zc6g4e9hizlnYDSsqyVHKRZePgvbhW5mFQ/s1600/4558.png" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556256260506978" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaRwVOaflRuNSbwh92D9HcYOPR9yNrTTAi5fgJfhJ7lcE4aWyYKNTXA-Eiqk27SeVYlJqePeJm1mxNkXJbpkdrEkFiNmTQ_HrpK3R0Zc6g4e9hizlnYDSsqyVHKRZePgvbhW5mFQ/s200/4558.png" style="cursor: pointer; height: 200px; width: 145px;" /></a>
<br />
<h3>
How it works</h3>
The method is to check resistance of the dummy resistor at the "Terminator".
The idea is simple.
Imagine there is a short circuit cable under testing.
The wire will act as nearly zero ohm resistor thus making the voltage divider near the dummy resistor to divide the 9V into 4.5V.
Calculate it your self [ ( 1k / ( 1k + 1k ) ) * 9V = 4.5V ].
4.5V is below than the lower "Comparator" limit (Vref 4.57V).
It will trigger the lower "Comparator" and make "Short" LED to light up.
Now for the open circuit cable.
Assuming the open circuit cable has an infinite ohm.
Voltage divider near the dummy resistor will give 9V.
This is more than the upper "Comparator" limit (VRef 4.8V) and will trigger make "Open" LED light up.
Other than that (both lower and upper "Comparator" didn't trigger) the "GOOD" LED will light up.
For the op-amp, I'm using JRC4558 dual op-amp since I have it in my stock.
You may use 741 op-amp or other multi-purpose op-amp.
<a href="http://www.ibiblio.org/kuphaldt/electricCircuits/Semi/SEMI_8.html" target="_blank" title="Learn more about op-amp here">Learn more about op-amp here</a>
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCeh_cwPFpjGJvX5K4XRHFcxLTomQ8l6yYW4GrGI8FLwXGkNMPpaoLoKCM_WPTGVGk662acHTmxevXkyoTJBeITNn448Gpyv1z5qlBC-LnbaMnWnFlniyURDW6sbbptRclulPiRQ/s1600/180px-PCB_variable_resistors.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556228534868354" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCeh_cwPFpjGJvX5K4XRHFcxLTomQ8l6yYW4GrGI8FLwXGkNMPpaoLoKCM_WPTGVGk662acHTmxevXkyoTJBeITNn448Gpyv1z5qlBC-LnbaMnWnFlniyURDW6sbbptRclulPiRQ/s200/180px-PCB_variable_resistors.jpg" style="cursor: pointer; height: 190px; width: 180px;" /></a>
<br />
<h3>
Vref tuning</h3>
Before turning on the circuit (power it up),
tune the potentiometer so that it will give the correct voltage reference to the "Comparator"s.<br />
<br />
<ul>
<li>Upper "Comparator" = 4.8V</li>
<li>Lower "Comparator" = 4.57V</li>
</ul>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXM156fFabHmWbqOK5s_VaJQ7op_KrunQthO9rAT-1lVg6pyhyphenhyphenMKIXckamjS_fkk68nwySU2Ty_zOCb8-6Xk7hqu7MFMnmrJQqCxk8Oz-cre8Xrudc4DsHUa5XR7AmtSkSwJZbCg/s1600/batt_low_ind.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556735285177442" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXM156fFabHmWbqOK5s_VaJQ7op_KrunQthO9rAT-1lVg6pyhyphenhyphenMKIXckamjS_fkk68nwySU2Ty_zOCb8-6Xk7hqu7MFMnmrJQqCxk8Oz-cre8Xrudc4DsHUa5XR7AmtSkSwJZbCg/s200/batt_low_ind.gif" style="cursor: pointer; height: 117px; width: 200px;" /></a>
<br />
<h3>
Extra - Low battery indicator</h3>
The extra circuit supplied is to check the battery condition.
Low battery voltage (below than ~6.9V) will show "RED" light up.
Else will show "GREEN" LED light up.
The basic, if there is a small amount of current go through the zener (reverse bias),
the first transistor (left) will be turned on making the "GREEN" LED turn on.
Other than that the second transistor (right) will be turned on and "RED" LED will light up.
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifjxu_FwMXF-so6XXz_ReaIV4_7FSQ_geAwV-3mh2QhZ2dAz0cXQYIF8Tg_31bhktZC-NptoxsTIEXL3qDa6ZRzi0O4FsMeSP3xIHDH7NA6TcH25aNtnnHswni5CP5hubwbuQTmA/s1600/buzzer.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406556740414138194" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifjxu_FwMXF-so6XXz_ReaIV4_7FSQ_geAwV-3mh2QhZ2dAz0cXQYIF8Tg_31bhktZC-NptoxsTIEXL3qDa6ZRzi0O4FsMeSP3xIHDH7NA6TcH25aNtnnHswni5CP5hubwbuQTmA/s200/buzzer.gif" style="cursor: pointer; height: 180px; width: 170px;" /></a>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMBsVsQ4Jy3SKcmuZgW2v8nevqZTq5mdqyC84uPBKglk69xeEjRlia-JgbrZw2TFEK3KyB6sMc8oqKNVOrPuIN1deVwILglqO0UW5H3XkixXOOE94YVOwRHKKZ3eZmpxS9J2qSgg/s1600/buzzer.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5406557326874462146" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMBsVsQ4Jy3SKcmuZgW2v8nevqZTq5mdqyC84uPBKglk69xeEjRlia-JgbrZw2TFEK3KyB6sMc8oqKNVOrPuIN1deVwILglqO0UW5H3XkixXOOE94YVOwRHKKZ3eZmpxS9J2qSgg/s200/buzzer.jpg" style="cursor: pointer; height: 114px; width: 125px;" /></a>
<br />
<h3>
Modification - Add in buzzer</h3>
You add in buzzer to the circuit to make it give an audible alarm.
The best is to alert us whenever the cable under test is not "GOOD".
So, adding a resistor, transistor and a buzzer/beeper to the last NAND (near "GOOD" LED) will do the job.
Use your own creativity for this. :-).<br />
<div class="separator" style="clear: both;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNXPzq5SLiaDdPwsg5O7KMNvuVDPXWPhFm6niU8dV-7yYdLJZ73RvMtSEbjeoRvoYNRfzkS1fCM18O6KH6VKGpdGFz_QeQj_rEVsPtmGf96K3BY9X8DIKBNLBvh0weeGxIhRGLzg/s1600/wc_ind.gif" imageanchor="1"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNXPzq5SLiaDdPwsg5O7KMNvuVDPXWPhFm6niU8dV-7yYdLJZ73RvMtSEbjeoRvoYNRfzkS1fCM18O6KH6VKGpdGFz_QeQj_rEVsPtmGf96K3BY9X8DIKBNLBvh0weeGxIhRGLzg/s400/wc_ind.gif" /></a></div>
<h3>Modification - Without NAND? (update)</h3>
You can use circuit above as replacement. Only some resistors and a transistor will do. Please refer to <a href="http://project.irone.org/water-level-indicator.html">Water Level Indicator</a> for more info.
<h3>Testing XLR cable (update)</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhciZWoAugyVtoyYGgii5T0k29GIInS5-bwGR9M7BOXkpBjdRW90dHNvn6dL6i5d0ma-WuEOXjJaliRf7-alMaiZCtSMegKh3WsjeP7sMBnpjDhn8rPIdu8nkQ-y58yi2ftr98pLw/s1600/xlr_test.jpg" imageanchor="1" style=""><img border="0" height="240" width="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhciZWoAugyVtoyYGgii5T0k29GIInS5-bwGR9M7BOXkpBjdRW90dHNvn6dL6i5d0ma-WuEOXjJaliRf7-alMaiZCtSMegKh3WsjeP7sMBnpjDhn8rPIdu8nkQ-y58yi2ftr98pLw/s320/xlr_test.jpg" /></a></div>
Since XLR cable have 3 wires, it can be tested by connecting 2 wires at a time as image above. Use crocodile clip for easy access.leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com11tag:blogger.com,1999:blog-25608005.post-10543083936202685702007-02-26T00:14:00.002+08:002009-11-21T21:56:17.747+08:00Upgrading DivX Player Firmware<h3>Upgrading DivX Player Firmware</h3>
<p>
Planning to upgrade your DivX player using CD? Good idea but if anything happen, your player will be dead.
In order to revive it, you need to re-flash it.
<br /><br />
Refer here for more information about re-flashing your DivX player.<br />
<a href="http://mtz.softpedia.com/index.php?option=com_content&task=view&id=20&Itemid=2" target="_blank" title="Upgrading a dead player">
Upgrading a dead player - By DivXpert.
</a>
<br /><br />
You can download some recommended softwares from their site and try it out.
Now the fun part, you need a hardware interface from your computer to the player.
Recommended hardware interface by DivXpert is standard Serial Data Cable for mobile phone.
So I built one.
</p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh08gxIGKdsaQkx_eAkPnUjBt_w07zaX9rmXPSXHLHxWp6twzvtkL4SOHdmqLr_X6yB5mBAOoyiPK3nxDICxzb1zUGk30R6lK1cBYTH4MaD0FEwStQdOYMjbr0C_96_pyUPrYqhFw/s1600/mtk_board.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh08gxIGKdsaQkx_eAkPnUjBt_w07zaX9rmXPSXHLHxWp6twzvtkL4SOHdmqLr_X6yB5mBAOoyiPK3nxDICxzb1zUGk30R6lK1cBYTH4MaD0FEwStQdOYMjbr0C_96_pyUPrYqhFw/s200/mtk_board.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554205181740562" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimkwehS8yuq283pN2XwM6ya_WVSpHTPOdH143tceCX0sdO49Cj6o2iksW3gy55Petlu8-a4fQ83VZrPP50yAKPuGBLIkJQHSmN2HtTEkqCS8Y4TTaTvckjldOhXwhBiUeKUqgAGw/s1600/upgrage_interface.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimkwehS8yuq283pN2XwM6ya_WVSpHTPOdH143tceCX0sdO49Cj6o2iksW3gy55Petlu8-a4fQ83VZrPP50yAKPuGBLIkJQHSmN2HtTEkqCS8Y4TTaTvckjldOhXwhBiUeKUqgAGw/s200/upgrage_interface.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554861718865794" /></a>
<h3>Identifying The Upgrade Port</h3>
<ul>
<li>Open up your player and find the main PCB & the upgrade port.</li>
<li>Most of them have 4 pins [3.3V],[TX],[RX],[GND].</li>
<li>Find the label for each pin under the PCB.</li>
</ul>
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYCvmFSG-GzADww3qU52hhGo4vdh_0iqR3tbrRi6qaVTjt2JP9EdyX4B-NJMFfzmg0JRpNdduBfsIep0T53qF_UwsDcwSPHI13dSxd4b1ohFk0VHmbOlo-mKkEA4c05vmE_9bPRA/s1600/install_conn.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYCvmFSG-GzADww3qU52hhGo4vdh_0iqR3tbrRi6qaVTjt2JP9EdyX4B-NJMFfzmg0JRpNdduBfsIep0T53qF_UwsDcwSPHI13dSxd4b1ohFk0VHmbOlo-mKkEA4c05vmE_9bPRA/s200/install_conn.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406553435441610818" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuoH49q_AhdRNXY_Z_2XRIZMDf_drofmUqGAhG5as81Ao8Apm45q7aemYMaw4gGzgbfLbIBZc-D6NsIesuAC6j9uOC4KsStmv6GbNsIaf92bVKy5Z9vFhybErgQfqnMDE4iKU9yA/s1600/male_conn.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuoH49q_AhdRNXY_Z_2XRIZMDf_drofmUqGAhG5as81Ao8Apm45q7aemYMaw4gGzgbfLbIBZc-D6NsIesuAC6j9uOC4KsStmv6GbNsIaf92bVKy5Z9vFhybErgQfqnMDE4iKU9yA/s200/male_conn.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554191153129746" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0zgFtHqbit-SXkhyphenhyphen-jTW5F_oMyEk6MmgN1p3thATlkTvvD1d2Snc2M8VvDEheFZvGIJBqa87dPtyK-_DVioOFAjAbzkKf3pVGDJiRqemHOrid7ROcsOrfx9amqXBXjPZq2-nWng/s1600/match_conn.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0zgFtHqbit-SXkhyphenhyphen-jTW5F_oMyEk6MmgN1p3thATlkTvvD1d2Snc2M8VvDEheFZvGIJBqa87dPtyK-_DVioOFAjAbzkKf3pVGDJiRqemHOrid7ROcsOrfx9amqXBXjPZq2-nWng/s200/match_conn.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554196466706402" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEishNKDc9N1KdWstXx2V0EaxXAqS9dS5-Dt73XEs2gtxWPfnuqQ7SgoGB9oo3WGjqTsDoiWXtQSCNhkogOhUqXGsRZ_JcZ9v8GKHVRYtWmyCtEtHLIkFPJjoHOENLdBc1Najly80w/s1600/take_out_conn.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEishNKDc9N1KdWstXx2V0EaxXAqS9dS5-Dt73XEs2gtxWPfnuqQ7SgoGB9oo3WGjqTsDoiWXtQSCNhkogOhUqXGsRZ_JcZ9v8GKHVRYtWmyCtEtHLIkFPJjoHOENLdBc1Najly80w/s200/take_out_conn.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554855458399154" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTdsPO_nSSvCwEHmxjwgMMfoBP9ZbWRAw2TtLcuGnlg5pYwxARcbE_T733sNiPY01PbkeAHDTcnYzOO0hC8AWztrThw6WzlAQYW4L_3_0SaPboGp6GFEC3ztfix7WDx1VDyQ-T1w/s1600/what_you_need.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTdsPO_nSSvCwEHmxjwgMMfoBP9ZbWRAw2TtLcuGnlg5pYwxARcbE_T733sNiPY01PbkeAHDTcnYzOO0hC8AWztrThw6WzlAQYW4L_3_0SaPboGp6GFEC3ztfix7WDx1VDyQ-T1w/s200/what_you_need.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554872351194610" /></a>
<h3>What You Need</h3>
<ul>
<li>
I found out that the male audio input connector from the old sound card
is suitable for the upgrade port. Use it if you have one.
</li>
<li>Old mouse cable match the female connector to this type of connector.</li>
<li>Find a cheap mobile serial data cable/ I'm using Nokia 3210 data cable.</li>
</ul>
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVwRoku161qY_wMLTiHvCRS9vca1I1rFJNF78kRlwwsyZ9ATX4FajaQeUUUaVgYsUvVU3XCagTpzyJwEI5xhj9FAodm7ykBhuAaovLFER1l97I3w_D-t4O507DRCq9c8dwEWvsKA/s1600/connect_to_board.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVwRoku161qY_wMLTiHvCRS9vca1I1rFJNF78kRlwwsyZ9ATX4FajaQeUUUaVgYsUvVU3XCagTpzyJwEI5xhj9FAodm7ykBhuAaovLFER1l97I3w_D-t4O507DRCq9c8dwEWvsKA/s200/connect_to_board.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406553428576190898" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjV0WUPeCJ01r2SdRDcKmgs1Rf5KxfIC3tmHjrrIoE7ElVIgyR17HjESnIkEdUbFMEhUOnlNfOeWq5ZlJwkX3hGgel_ukVXFDZdBaBg8wor56nluexkJU9_bJwvj9IhDJO1NU2aCA/s1600/data_cable.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjV0WUPeCJ01r2SdRDcKmgs1Rf5KxfIC3tmHjrrIoE7ElVIgyR17HjESnIkEdUbFMEhUOnlNfOeWq5ZlJwkX3hGgel_ukVXFDZdBaBg8wor56nluexkJU9_bJwvj9IhDJO1NU2aCA/s200/data_cable.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406553431897853378" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgH8BBDRq3DmOdfcZMx15ywYiJlwTcIL_gJG6JZ8JzwUzjgXILtkD47PWRUS73P7l7g8Y5LfpDISc93QBd-g9SMtRcQ2C6-XIDH5zlA0exJT4L1KLL6i_WkLUZHgReqjRFKBL_ARg/s1600/join_conn.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgH8BBDRq3DmOdfcZMx15ywYiJlwTcIL_gJG6JZ8JzwUzjgXILtkD47PWRUS73P7l7g8Y5LfpDISc93QBd-g9SMtRcQ2C6-XIDH5zlA0exJT4L1KLL6i_WkLUZHgReqjRFKBL_ARg/s200/join_conn.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406553446063835922" /></a>
<h3>Install & Join It Together</h3>
<ul>
<li>Open the data cable (phone end connector)</li>
<li>Join it with the female mouse connector.</li>
<li>Plug it into the player PCB and you are ready.</li>
<li>
Refer
"<a href="http://mtz.softpedia.com/index.php?option=com_content&task=view&id=20&Itemid=2" target="_blank" title="Upgrading a dead player">
Upgrading a dead player - By DivXpert.
</a>"
for detail.
</li>
</ul>
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmztKp58d5fjApVPmrKeb4L9knJD9JqJBGNN_7fYmeCc0gAvPJ5_NJYgt3gbU0LmBWU6JKqtcFC96w3Fvwq2k3uxhpUsklUNnY0kMe7kIToxrFE7VjVnDevcNa1qs3dvyPl2FA4A/s1600/conn_5v.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmztKp58d5fjApVPmrKeb4L9knJD9JqJBGNN_7fYmeCc0gAvPJ5_NJYgt3gbU0LmBWU6JKqtcFC96w3Fvwq2k3uxhpUsklUNnY0kMe7kIToxrFE7VjVnDevcNa1qs3dvyPl2FA4A/s200/conn_5v.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406553423066948626" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSYG8nrMGozPiWOvRd2cP8lXyWC5Z_SW_LHTGsQ27nqcN5x2lSaRStOYLwNrZMUMJplaLvJKYkLKe9b0ZjZ2SeKiPL9wIuW4CnzvSF5MlnR4olpiSYmhyn1rVpI-QRXNDBBND-zA/s1600/using_max232b.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSYG8nrMGozPiWOvRd2cP8lXyWC5Z_SW_LHTGsQ27nqcN5x2lSaRStOYLwNrZMUMJplaLvJKYkLKe9b0ZjZ2SeKiPL9wIuW4CnzvSF5MlnR4olpiSYmhyn1rVpI-QRXNDBBND-zA/s200/using_max232b.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554865070345394" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX0R8PI913BeDCRsq7_W9jwwJVD_KQAYWGlpEaBwZXFQyZ6B3VJbRXLbMeSfJwA1z5zK-jswBbpEBSqiNIOWsvEeuWbkDu087h3fuTrhtpKwgjcG-O88KjGy9RRtAmCXc9-lWsXg/s1600/max232.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX0R8PI913BeDCRsq7_W9jwwJVD_KQAYWGlpEaBwZXFQyZ6B3VJbRXLbMeSfJwA1z5zK-jswBbpEBSqiNIOWsvEeuWbkDu087h3fuTrhtpKwgjcG-O88KjGy9RRtAmCXc9-lWsXg/s200/max232.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554202586377794" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxrVxCdCP9rhG0IVr_VOeAoe4hL3rxjkyeAyqYJ3vPkBTo9ecYvgTGTv4dn2M7pLX-QES_rCZI_JEpI8fpDpiiOVGYahKz_VvETm-BBuBSMrEoRUL-0p3-3dfpYdyoALqfCgIxCg/s1600/th_INTERFACE-MT1389.jpg"><img style="cursor:pointer; cursor:hand;width: 158px; height: 76px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxrVxCdCP9rhG0IVr_VOeAoe4hL3rxjkyeAyqYJ3vPkBTo9ecYvgTGTv4dn2M7pLX-QES_rCZI_JEpI8fpDpiiOVGYahKz_VvETm-BBuBSMrEoRUL-0p3-3dfpYdyoALqfCgIxCg/s200/th_INTERFACE-MT1389.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554858244418002" /></a>
<h3>My Other Version of Cable</h3>
<ul>
<li>Another option is to find MAX232 chip from maxim.</li>
<li>
<a href="http://www.dvdboard.de/forum/showthread.php?threadid=73773" target="_blank" title="Using MAX3232">
Better if you have MAX3232 since this chip is using 3.3V
</a>
</li>
<li>I'm using normal MAX232 (5V) since I don't have one.</li>
<li>Because of that, I need to connect the power of the MAX232 chip to the player +5V port</li>
</ul>
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJd1kmekLPLSPR0xe5-RHyTWKF1bk2K5JOk_ye4VkwUHScbeSPgUa40dOOoZ9MJ54EbVIlNOx58p7CA_TweTwWbO-RuSG7nTc311JKR0Y_bsH8QMVqgReHP5zc-8lgyyqr2M0caA/s1600/mtktool.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 173px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJd1kmekLPLSPR0xe5-RHyTWKF1bk2K5JOk_ye4VkwUHScbeSPgUa40dOOoZ9MJ54EbVIlNOx58p7CA_TweTwWbO-RuSG7nTc311JKR0Y_bsH8QMVqgReHP5zc-8lgyyqr2M0caA/s200/mtktool.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406554205272426882" /></a>
<h3>After that?</h3>
<p>
Please refer to
"<a href="http://mtz.softpedia.com/index.php?option=com_content&task=view&id=20&Itemid=2" target="_blank" title="Upgrading a dead player">
Upgrading a dead player - By DivXpert.
</a>"
for the software usage on how to upgrade.
They provide the latest firmware for your Player.
</p>
<h3>Good Luck</h3>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com0tag:blogger.com,1999:blog-25608005.post-1166870888525206512006-12-23T18:45:00.001+08:002009-11-21T21:42:15.258+08:00Biquad ant. for WLAN<h3>Biquad Antenna for 2.4 GHz - 802.11b/g - WiFi - WLAN</h3>
<p>After some research, I found out that the simplest type of
homemade WLAN antenna is BiQuad antenna. Many sites provide good
instruction on how to assemble it.<br />
(refer below)</p>
<ul>
<li><a href="http://martybugs.net/wireless/biquad/" title=
"Biquad Antenna Construction" target="_blank">Biquad Antenna
Construction</a></li>
<li><a href="http://flakey.info/antenna/biquad/" title=
"Biquad Sector antenna for 2.4 GHz" target="_blank">Biquad Sector
antenna for 2.4 GHz</a></li>
<li><a href="http://www.sorgonet.com/network/biquad/" target=
"_blank" title=
"Building a biquad antenna for wireless 802.11b">Building a biquad
antenna for wireless 802.11b</a></li>
<li><a href="http://www.trevormarshall.com/biquad.htm" title=
"Trevor Marshall BiQuad 802.11b Antenna">Trevor Marshall BiQuad
802.11b Antenna</a> [My favorite]</li>
</ul>
I'm not going to repeat it.
<h3>My Antenna</h3>
<p>So I start by recycling some parts that I found in my workshop
and construct it.<br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5Uw_Z_Ipn7nNgzoUaOgFBMxO6PD45PQmZv6VzGKQP-0Ohtegv2ZiCimBNQTYn0jfKiIYAMt_Z_tmNkVWIk0jdE815R5-O2sQshb1ZCb_DIy5d8S4EqBDFjfPa_-Idk8wfxXp4nA/s1600/twister.jpg"><img style="cursor:pointer; cursor:hand;width: 150px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5Uw_Z_Ipn7nNgzoUaOgFBMxO6PD45PQmZv6VzGKQP-0Ohtegv2ZiCimBNQTYn0jfKiIYAMt_Z_tmNkVWIk0jdE815R5-O2sQshb1ZCb_DIy5d8S4EqBDFjfPa_-Idk8wfxXp4nA/s200/twister.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551177072791618" /></a> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOSLjR81AP980-57XlnU0gC__lHHNvlbNVobfYufrFPezzGKAy9PFzOPjYdcT-MJMjdOtkM26VIACrFrwOLW5KgndJKDlFwIN-LtcavJAuXnscbIZqd4yeAIwjrZCjk477htZM6g/s1600/connector.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOSLjR81AP980-57XlnU0gC__lHHNvlbNVobfYufrFPezzGKAy9PFzOPjYdcT-MJMjdOtkM26VIACrFrwOLW5KgndJKDlFwIN-LtcavJAuXnscbIZqd4yeAIwjrZCjk477htZM6g/s200/connector.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551172245377298" /></a><br />
I took about 10-20 min. for me to finished it.<br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEhvYGyX8hnFnzKttGr4HYtAb9DE3QMkGGvTG9V7_E7EnLB3ydiIiTV-hqqThhATxFi99NfM2eZHvkgkZpuBIiKFUDoZb16k3ITlcldXT8qrhmkCyTPLI8uqfSDMnar-3YO9PqXw/s1600/element.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 124px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEhvYGyX8hnFnzKttGr4HYtAb9DE3QMkGGvTG9V7_E7EnLB3ydiIiTV-hqqThhATxFi99NfM2eZHvkgkZpuBIiKFUDoZb16k3ITlcldXT8qrhmkCyTPLI8uqfSDMnar-3YO9PqXw/s200/element.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551717872383986" /></a><br />
The critical process is to make the element.<br />
With proper method and dimension this thing will work.<br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOA5AKMYfwtLk1VILnRfqMibHrqlcOI8rPgiReuQTcWaM4eL50xEdQFCBy6WOaYU-nvmlLr0WBtMtPhv2xp8F-isdii3vpO6E-OI-bQBAk4DxVf5HcyAZsXgn_qK3leiQ9wvnoEg/s1600/antenna1.jpg"><img style="cursor:pointer; cursor:hand;width: 150px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOA5AKMYfwtLk1VILnRfqMibHrqlcOI8rPgiReuQTcWaM4eL50xEdQFCBy6WOaYU-nvmlLr0WBtMtPhv2xp8F-isdii3vpO6E-OI-bQBAk4DxVf5HcyAZsXgn_qK3leiQ9wvnoEg/s200/antenna1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551161531660194" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKs_AWauy3LDCSeverCZUExuJbF_hq0IqiCPGAxrq9kZYPI_8iXSGnJ5A_9OOHK3HTlkGeyGbLX3FGQvppGqTZrCbogLwlecXWUpAYUNXHv9EwN8_NBEstrYKp24bRTVT1PAZSXw/s1600/antenna2.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKs_AWauy3LDCSeverCZUExuJbF_hq0IqiCPGAxrq9kZYPI_8iXSGnJ5A_9OOHK3HTlkGeyGbLX3FGQvppGqTZrCbogLwlecXWUpAYUNXHv9EwN8_NBEstrYKp24bRTVT1PAZSXw/s200/antenna2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551164098471938" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhI4XmYWqrA8-geTzE0TlMY22mo53fgf7rl-5nC0fIV5AQUaBBlEtaWvMbZottsna41GTCemFtbsswSsjl8RmFObxwQLgIoWcJEkzKr3P6XXI8XkCDP8yA2FRxNwyhuoDHncBatog/s1600/antenna3.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhI4XmYWqrA8-geTzE0TlMY22mo53fgf7rl-5nC0fIV5AQUaBBlEtaWvMbZottsna41GTCemFtbsswSsjl8RmFObxwQLgIoWcJEkzKr3P6XXI8XkCDP8yA2FRxNwyhuoDHncBatog/s200/antenna3.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406551166354232162" /></a></p>
<h3>Good Luck!!!</h3>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com1tag:blogger.com,1999:blog-25608005.post-1154605033614674582006-08-03T19:35:00.003+08:002009-11-21T21:36:07.105+08:00ATX PSU Diagnose<h3>About ATX Power Supply</h3>
<p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipXXXsMiNdg-ce2CiPZfwO1PxbUPqEhJ8NxzWcGnJVH0hrYvV3JFXWRxDB3X0ri4-3Vi0rO-mpP83cMMnHKotI-s4fS0A65kqNU6Msk6yPtj9y_BAusIVx08TdQCSrNZQsWdHLBA/s1600/about.jpg"><img style="cursor:pointer; cursor:hand;width: 189px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipXXXsMiNdg-ce2CiPZfwO1PxbUPqEhJ8NxzWcGnJVH0hrYvV3JFXWRxDB3X0ri4-3Vi0rO-mpP83cMMnHKotI-s4fS0A65kqNU6Msk6yPtj9y_BAusIVx08TdQCSrNZQsWdHLBA/s200/about.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406548573424203330" /></a>
<br />
ATX Power Supply converts the wall (AC) to the direct current (DC) needed by the
PC. The power supply looks like a metal box with fan.
Typical computer power supply generates the voltages needed by the computer motherboard accessories.
[<a href="http://computer.howstuffworks.com/power-supply.htm" target="_blank" title="computer.howstuffworks.com">Read more...</a>]
</p>
<h3>Before Everything</h3>
<p>
Disconnect all socket from your main board, HDD, CD/DVD drive, Floppy drive and etc so that we can isolate which part
is not working.
</p>
<h3>Step 1 - Check Wall AC power</h3>
<p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfvB52nMPkb7oGG09yp74mTnyVab4pPTLXGwRRR8TBSHsfSkUt5f46FKayJq2L7gyuxjxi6rRERIB_2npLyV19NoaGxYLZWzq7j-bDO5FIKrhFXi3HVjvMOScj0gYlju7leKp-Kg/s1600/step1.jpg"><img style="cursor:pointer; cursor:hand;width: 95px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfvB52nMPkb7oGG09yp74mTnyVab4pPTLXGwRRR8TBSHsfSkUt5f46FKayJq2L7gyuxjxi6rRERIB_2npLyV19NoaGxYLZWzq7j-bDO5FIKrhFXi3HVjvMOScj0gYlju7leKp-Kg/s200/step1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406547557858600162" /></a>
<br />
To check this, you may try to plug in any electrical appliances to the wall socket to verify that the 240V exist
such as lamp, table fan or etc. If it is working, that mean the power from the wall socket is ok.
You may also check the voltage with multimeter if you have one.
</p>
<h3>Step 2 - Power Socket Fuse</h3>
<p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEha8HG3FRmfrLs3XifDTq0RucEbcPU2HerykrH5oDLjXVIxD2CHC45TlYEOfCBHfWAD2KklSs1EaHA6jxsHS_-vHIvs2P8CN8e7fBNVZ1_9csFaCzBZoBJa14FX-J5agms_ictQeQ/s1600/step2.jpg"><img style="cursor:pointer; cursor:hand;width: 184px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEha8HG3FRmfrLs3XifDTq0RucEbcPU2HerykrH5oDLjXVIxD2CHC45TlYEOfCBHfWAD2KklSs1EaHA6jxsHS_-vHIvs2P8CN8e7fBNVZ1_9csFaCzBZoBJa14FX-J5agms_ictQeQ/s200/step2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406547559486132066" /></a>
<br />
If you are using power socket with fuse, you may try to check this first.
The method is to plug the other end to other appliances such as your printer (turn on to verify),
monitor (turn on and look for LED indicator) or rice cooker (My rice cooker using the same type of socket).
Same thing, if it is ok, we know up to the power cord is also ok.
</p>
<h3>Step 3 - Voltage Selector</h3>
<p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5MohtbGqozO_SU71L3ejlhsQONQajkP9EWw351XI_g-xnMDRnDoCrHtTlJ-9wNOoHeUpKYz02fRHsNhV3LjsmYYqiFcQyZ3KOK45XlmE8WA0zQ80L6dFfGWswE_WO7wpAIxYuTg/s1600/step3.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 194px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5MohtbGqozO_SU71L3ejlhsQONQajkP9EWw351XI_g-xnMDRnDoCrHtTlJ-9wNOoHeUpKYz02fRHsNhV3LjsmYYqiFcQyZ3KOK45XlmE8WA0zQ80L6dFfGWswE_WO7wpAIxYuTg/s200/step3.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406547563905443346" /></a>
<br />
Not all power supply have this switch. My place using 240VAC.
So if it accidentally set to 110VAC the power supply maybe burn out. No more further troubleshooting.
But at place with 110VAC, maybe it will not burn out when it accidentally set to 240VAC.
It will in the low voltage condition and may not start I presume.
Select the correct voltage according to power provider rating.
</p>
<h3>Step 4 - 5V+ Standby Voltage</h3>
<p>
<a href="http://www.bluemax.net/techtips/ATXPowerSupplyWiring/ATXPowerSupplyWiring.htm" target="_blank" title="www.bluemax.net">
From bluemax.net
</a>
<br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9T50r5FA4LnXoTra64TPoviZHBmU3Zgff1_5AtkGi5ylN5E9Nc86ajDat4J96d-08u_E_ILUpF-yHtEIFCAgeJIplYyrZrYHoj-e6e1xthDXTz06jvxelLZ1gzIqZWkeOqripBA/s1600/atx_engadget_howto.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 165px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9T50r5FA4LnXoTra64TPoviZHBmU3Zgff1_5AtkGi5ylN5E9Nc86ajDat4J96d-08u_E_ILUpF-yHtEIFCAgeJIplYyrZrYHoj-e6e1xthDXTz06jvxelLZ1gzIqZWkeOqripBA/s200/atx_engadget_howto.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406550038860898418" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_ATI9awnch73UTWqgu_X0IrcWp6eFyNdD2cZ22Gj3wqLvkQHJx91Wan3YJprL6_tUp5kn_M3VMWK21gwk8xRZOYZ5H29ZAlAn8BZr6k2cBGMj9zAMfBqMmLJRCFL6r9dH7WiQ1A/s1600/step4.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 146px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_ATI9awnch73UTWqgu_X0IrcWp6eFyNdD2cZ22Gj3wqLvkQHJx91Wan3YJprL6_tUp5kn_M3VMWK21gwk8xRZOYZ5H29ZAlAn8BZr6k2cBGMj9zAMfBqMmLJRCFL6r9dH7WiQ1A/s200/step4.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406547568657738082" /></a>
<br />
The first point that have voltage upon plug in the AC power is the standby voltage.[refer figure above]
5VSB constantly provides 5V power to the connector at pin 9.
Check this voltage using volt meter to make sure that 5V exist (while the AC is turn on).
</p>
<h3>Step 5 - Simulate Power On</h3>
<p>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjre1dY_hklMUCZFV-LstPtGpKv3nHL1mhKCPbcbKA_P_iXMTD5SffedYTul7tHM8th0N3UANzDCxK6Fgj9cMgJR6vt7BXn-72ghyj1oMkBh9enookis6xynsJt9w-j2q-3-H6fdg/s1600/step5.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 94px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjre1dY_hklMUCZFV-LstPtGpKv3nHL1mhKCPbcbKA_P_iXMTD5SffedYTul7tHM8th0N3UANzDCxK6Fgj9cMgJR6vt7BXn-72ghyj1oMkBh9enookis6xynsJt9w-j2q-3-H6fdg/s200/step5.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406547573332408146" /></a>
<br />
Now is the interesting part. To turn on your ATX power supply without mother board, the way is to make contact
between pin 14 and ground pin(3,5,7,13,15,16,17). Meaning you can turn it on by connecting pin 14 with the only green wire
connecting to it to other ground pin that is the pin with black wire. To verify that the power supply is working,
the ventilation fan should be working split second after you connect pin 14 to ground. Paper clip would be the best choice.
</p>
<h3>Step 6 - Check All Output</h3>
<p>
Now you can check all voltage output from the power supply. You need a voltmeter in order to do that.
<table>
<tr>
<td>
<table border=1>
<tr>
<th>Pin</th>
<th>Name</th>
<th width=16> </th>
<th>Color</th>
<th>Description</th></tr>
<tr>
<td>1</td>
<td>3.3V</td>
<td align=middle width=16 bgcolor=#ff7f00> </td>
<td>Orange</td>
<td>+3.3 VDC</td></tr>
<tr>
<td>2</td>
<td>3.3V</td>
<td align=middle width=16 bgcolor=#ff7f00> </td>
<td>Orange</td>
<td>+3.3 VDC</td></tr>
<tr>
<td>3</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>4</td>
<td>5V</td>
<td align=middle width=16 bgcolor=#ff0000> </td>
<td>Red</td>
<td>+5 VDC</td></tr>
<tr>
<td>5</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>6</td>
<td>5V</td>
<td align=middle width=16 bgcolor=#ff0000> </td>
<td>Red</td>
<td>+5 VDC</td></tr>
<tr>
<td>7</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>8</td>
<td>PWR_OK</td>
<td align=middle width=16 bgcolor=#777777> </td>
<td>Gray</td>
<td>Power Ok (+5V & +3.3V is ok)</td></tr>
<tr>
<td>9</td>
<td>5VSB</td>
<td align=middle width=16 bgcolor=#800080> </td>
<td>Purple</td>
<td>+5 VDC Standby Voltage (max 10mA)</td></tr>
<tr>
<td>10</td>
<td>12V</td>
<td align=middle width=16 bgcolor=#ffff00> </td>
<td>Yellow</td>
<td>+12 VDC</td></tr>
<tr>
<td>11</td>
<td>3.3V</td>
<td align=middle width=16 bgcolor=#ff7f00> </td>
<td>Orange</td>
<td>+3.3 VDC</td></tr>
<tr>
<td>12</td>
<td>-12V</td>
<td align=middle width=16 bgcolor=#0000ff> </td>
<td>Blue</td>
<td>-12 VDC</td></tr>
<tr>
<td>13</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>14</td>
<td>/PS_ON</td>
<td align=middle width=16 bgcolor=#00ff00> </td>
<td>Green</td>
<td>Power Supply On (active low)</td></tr>
<tr>
<td>15</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>16</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>17</td>
<td>COM</td>
<td align=middle width=16 bgcolor=#000000> </td>
<td>Black</td>
<td>Ground</td></tr>
<tr>
<td>18</td>
<td>-5V</td>
<td align=middle width=16 bgcolor=#ffffff> </td>
<td>White</td>
<td>-5 VDC</td></tr>
<tr>
<td>19</td>
<td>5V</td>
<td align=middle width=16 bgcolor=#ff0000> </td>
<td>Red</td>
<td>+5 VDC</td></tr>
<tr>
<td>20</td>
<td>5V</td>
<td align=middle width=16 bgcolor=#ff0000> </td>
<td>Red</td>
<td>+5 VDC</td>
</tr>
</table>
<a href="http://www.bluemax.net/techtips/ATXPowerSupplyWiring/ATXPowerSupplyWiring.htm" target="_blank" title="www.bluemax.net">
From bluemax.net
</a>
</td>
<td valign="top">
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG5xMrf06-fYQDgXfTqmbt2neZDPCbiDEc8XHx5CspJfRNxGtvvm4Y0yPaH-ycQWYA_v98hctVSRod4QVc_9WV5Y51WmUWizGEYVzPaWR8Zll6vzBfX264LvARQ1hNPskkz45zBw/s1600/step6.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 186px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG5xMrf06-fYQDgXfTqmbt2neZDPCbiDEc8XHx5CspJfRNxGtvvm4Y0yPaH-ycQWYA_v98hctVSRod4QVc_9WV5Y51WmUWizGEYVzPaWR8Zll6vzBfX264LvARQ1hNPskkz45zBw/s200/step6.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406548580726788386" /></a>
<br />
</td>
</tr>
</table>
</p>
<h3>Good Luck</h3>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com11tag:blogger.com,1999:blog-25608005.post-1147267390428992402006-05-10T21:22:00.001+08:002009-11-21T21:22:04.159+08:00S/PDIF - TOSLINK interface<h3>Circuit & Information on TOSLINK interface</h3>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGaUZrqTS1x3SQi206r-t3ernc5m23HMXQ4lKS6YADEq3WpwH5T8WGsbzCtTGf4YF0qTKvnqjCjFK3Ieki8nWrw09Epaly6OA7DApZkp1dhNdzJ8n1su-w8Z0UK9XO2_DgGfgUsQ/s1600/circuit.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 73px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGaUZrqTS1x3SQi206r-t3ernc5m23HMXQ4lKS6YADEq3WpwH5T8WGsbzCtTGf4YF0qTKvnqjCjFK3Ieki8nWrw09Epaly6OA7DApZkp1dhNdzJ8n1su-w8Z0UK9XO2_DgGfgUsQ/s200/circuit.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545042284677922" /></a>
<br />
So you want to get a high quality audio for minidisc recording but when
using red and white RCA, the quality drop drastically. Here a my cheap solution for you.
Actually you can find a lot of references of this type of simple project in the internet.
<br /><br />
REF
<br />
* S/PDIF = Sony/Philips Digital Interface<br />
* TOSLINK = (
<a href="http://www.audioholics.com/techtips/audioprinciples/interconnects/toslink.php">
TOSLINK Interconnect History & Basics
</a>
)<br />
* <a href="http://www.minidisc.org/cdrom_opticalout.htm" target="_blank">Another web offering the same information</a>
<br />
* <a href="http://www.epanorama.net/documents/audio/spdif.html">SPDIF at epanorama.net</a>
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEih8GFDyuLyknYdoS4cLlTtD9C59QysQ_LjMPGiy0OcViSEvjtq41uep31bAE8tHAWwX6xzuZODWSq0h2apbne_U4mWW48wgShtopQCuvh61neO5LAN5AFt9E5soBlk1Cmglh2NFg/s1600/parts.jpg"><img style="cursor:pointer; cursor:hand;width: 156px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEih8GFDyuLyknYdoS4cLlTtD9C59QysQ_LjMPGiy0OcViSEvjtq41uep31bAE8tHAWwX6xzuZODWSq0h2apbne_U4mWW48wgShtopQCuvh61neO5LAN5AFt9E5soBlk1Cmglh2NFg/s200/parts.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545760190141058" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUjdyZH1qv_c9pByx_c84qejKA9AIR3lYT-doYB8fyMWiWa52oNhpwZ3yid7buMXErVNFPv2f9fa__HUb8grQPJtvc4-q8WVqgnAfU1BC6-3MKBY_SGTQ83D0W6TfTCxcjZ_RMaA/s1600/wihout_plug.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 163px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUjdyZH1qv_c9pByx_c84qejKA9AIR3lYT-doYB8fyMWiWa52oNhpwZ3yid7buMXErVNFPv2f9fa__HUb8grQPJtvc4-q8WVqgnAfU1BC6-3MKBY_SGTQ83D0W6TfTCxcjZ_RMaA/s200/wihout_plug.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545775113241202" /></a>
<br />
Meet my version of cheap, 2 components TOSLINK @ S/PDIF.
Try to find a cable with connector from old PC casing for this.
(HDD led,reset switch or power button connector)
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghOC2ddewDwO0h0p0JUHLx_AJ185aAWspxMPFkN1mTizhNaun7wy4w2lggtnjYlQzMVjNlUqJJJxlXaj9goMC-u-NUsa_AxKdC3XAld0KIgafHMPYzjXEZ_U7tolPa3zAstKeaqA/s1600/blow_up.jpg"><img style="cursor:pointer; cursor:hand;width: 198px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghOC2ddewDwO0h0p0JUHLx_AJ185aAWspxMPFkN1mTizhNaun7wy4w2lggtnjYlQzMVjNlUqJJJxlXaj9goMC-u-NUsa_AxKdC3XAld0KIgafHMPYzjXEZ_U7tolPa3zAstKeaqA/s200/blow_up.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545036948673074" /></a>
<br />
Assemble it using your own creativity. Use the pen tube for the light transmission.
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgON1cqU834Tvcd_tt_Avr_mIs811PLE8K05Eu5uwc3BVo8mPYuAej4Ug-R-jsNx3GgghdXN8N-NjBiqwZfUWrl-LaTg2YCQoTOpxynInUbWo7xawQaW69Fn29-dJDMWZ1ryXJF4A/s1600/cdrom_connect.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 194px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgON1cqU834Tvcd_tt_Avr_mIs811PLE8K05Eu5uwc3BVo8mPYuAej4Ug-R-jsNx3GgghdXN8N-NjBiqwZfUWrl-LaTg2YCQoTOpxynInUbWo7xawQaW69Fn29-dJDMWZ1ryXJF4A/s200/cdrom_connect.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545039070192706" /></a>
<br />
Connect it to the back of your CDROM drive. Since (D, the signal should go to anode and G should go to the ground/cathode)
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRygFcATzE4H1cMszvZnOP5OEZ1_7ZjqFt9TTjpZLDWV3a1YACmi4zi0eWWUOn3kcAG4FOahNuWk_fCZyV0V3O4rd7DkhBKiCPwO0yMVuT2zCX0HWxV5LPINaCr0FUbQ2zPBqpkQ/s1600/llight_it_up.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 182px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRygFcATzE4H1cMszvZnOP5OEZ1_7ZjqFt9TTjpZLDWV3a1YACmi4zi0eWWUOn3kcAG4FOahNuWk_fCZyV0V3O4rd7DkhBKiCPwO0yMVuT2zCX0HWxV5LPINaCr0FUbQ2zPBqpkQ/s200/llight_it_up.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545047165031042" /></a>
<br />
Test it out. you should see the light come out from the tip/tube.
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAwDnfj7qhxijqp1tWqMFQL_7vR3sZfuxcj-7aA5ZB8RByF9eBu8N-iNWxKnGJjyCGNJWya_AqY5JqgpCb4vvTtc7RlSUG63fM744cTzlMcO8ObmrYxjUVR-6VGrieOqpi7R_rFQ/s1600/recording.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 142px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAwDnfj7qhxijqp1tWqMFQL_7vR3sZfuxcj-7aA5ZB8RByF9eBu8N-iNWxKnGJjyCGNJWya_AqY5JqgpCb4vvTtc7RlSUG63fM744cTzlMcO8ObmrYxjUVR-6VGrieOqpi7R_rFQ/s200/recording.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545767846212322" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgoW3PjCV2ZxDvyXF_pGbApiMPDCDERWRsg4h21VRlF1-YLyOg4VWT1VSV1G-VVk9yVFf7d3eaqSNIOP8yRoQ-MqW4I73bmtYuRnxm67eLWR7JpA58WD1KmLG_bVCt-MecBvIo2hg/s1600/pa_back.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 188px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgoW3PjCV2ZxDvyXF_pGbApiMPDCDERWRsg4h21VRlF1-YLyOg4VWT1VSV1G-VVk9yVFf7d3eaqSNIOP8yRoQ-MqW4I73bmtYuRnxm67eLWR7JpA58WD1KmLG_bVCt-MecBvIo2hg/s200/pa_back.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545754977455138" /></a>
<br />
Connect to your MD or other device such as power amp that support optical in.
<br /><br />
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7IqJMjVhvEHLuhJW5rnClaiy1eH3Mtig0BcVYUS3LKQiQAkRPcBhuqbwoEIR0Xt86lg8LZsWniV1m5boUlTgpyw5VTbEB6_6_VPrSUqXZmSGTISKcEKQ0LxLD5CoIXwx34Bx0UQ/s1600/md_port.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 169px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7IqJMjVhvEHLuhJW5rnClaiy1eH3Mtig0BcVYUS3LKQiQAkRPcBhuqbwoEIR0Xt86lg8LZsWniV1m5boUlTgpyw5VTbEB6_6_VPrSUqXZmSGTISKcEKQ0LxLD5CoIXwx34Bx0UQ/s200/md_port.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406545053768299202" /></a>
<br />
Actually, I have one of this (USB to SPDIF converter) for my minidisc but just to share with you on how to find a supercheap
solution before start buying. :-)
<br />
Even my new MSI mainboard do have built-in TOSLINK :-)leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com2tag:blogger.com,1999:blog-25608005.post-1146826150369313062006-05-05T18:48:00.003+08:002009-11-21T22:41:09.991+08:00PC IrDA interface<h3>DIY IR interface</h3>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG-KFvCu4FksIEfFqsTsW4xoDcny_aPMMBI1IPfSr7byH_NSLs8IIl3nfX4EP4gYEkU60Yl69f4_Ah5Pkj4JWcXreQHnOOKU9-zEgMGNycb84dMUy_d4ONo2qPu2OkWKhfEns6Jw/s1600/irda_circuit.gif"><img style="cursor:pointer; cursor:hand;width: 194px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG-KFvCu4FksIEfFqsTsW4xoDcny_aPMMBI1IPfSr7byH_NSLs8IIl3nfX4EP4gYEkU60Yl69f4_Ah5Pkj4JWcXreQHnOOKU9-zEgMGNycb84dMUy_d4ONo2qPu2OkWKhfEns6Jw/s200/irda_circuit.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406543466645935266" /></a>
<br/>
This circuit is also from <a href="http://www.electronics-lab.com/projects/pc/018/">www.electronics-lab.com</a>.
Since it is very hard for me to get the <b>infrared interface (TFDU4100)</b>, I start to look in the old/damage handphones.
It looks something like this.
<br/>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMiwgSVNZ0FBBbXOn3sPXOstVSuFjP16EMVY1hWWpLKoC90Rrb4uXduk12hw1MgYd7NuRTfWrWnduMdZWPyL4KmzJ1hCVwrqMCeTqZyasbMdX_Qb8SqQGMQEM4j-5XTEl0FeGXFQ/s1600/ir_module_8850.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 78px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMiwgSVNZ0FBBbXOn3sPXOstVSuFjP16EMVY1hWWpLKoC90Rrb4uXduk12hw1MgYd7NuRTfWrWnduMdZWPyL4KmzJ1hCVwrqMCeTqZyasbMdX_Qb8SqQGMQEM4j-5XTEl0FeGXFQ/s200/ir_module_8850.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406565422445257122" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqWpzZ6T4P_xPteQGKRfaQ1UvEzPQsAX9AGtmWQ8wWJIzJB3Xfj2mXBcceABkRXt-a3EPoqAnGfAf7WWgtnlJxBqPVUKj9NnfMkt9ip9YA8DPlMUe4Gg4t5tUxbFmX0PCK6BUrjg/s1600/ir_module_6600.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 108px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqWpzZ6T4P_xPteQGKRfaQ1UvEzPQsAX9AGtmWQ8wWJIzJB3Xfj2mXBcceABkRXt-a3EPoqAnGfAf7WWgtnlJxBqPVUKj9NnfMkt9ip9YA8DPlMUe4Gg4t5tUxbFmX0PCK6BUrjg/s200/ir_module_6600.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406565419591107298" /></a>
<br/>
Now, you need to remove it using the hot air blower perhaps.
<br/>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdCr2gVrfB8o2l_jPVy-rCT53qDaGu_N3gmHCqgDu0Mbg_Y2V41RwGocM920DqVK9IPt5f4vHCV91TmUO1v8jXrrC80QgnNIuTpj2vIOCM1ifWiiSyt4tik8SYBCQ5ageRXq2wDQ/s1600/smd_rework.jpg"><img style="cursor:pointer; cursor:hand;width: 197px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdCr2gVrfB8o2l_jPVy-rCT53qDaGu_N3gmHCqgDu0Mbg_Y2V41RwGocM920DqVK9IPt5f4vHCV91TmUO1v8jXrrC80QgnNIuTpj2vIOCM1ifWiiSyt4tik8SYBCQ5ageRXq2wDQ/s200/smd_rework.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406565894339689090" /></a>
<h3>Connecting to motherboard</h3>
Please refer to <a href="http://www.electronics-lab.com/projects/pc/018/">www.electronics-lab.com</a>
on how connect this irda module to your motherboard.
<h3>My IrDA</h3>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9duEz-8vGVBVFQHhmsz7-doAzhzhuAbLYKS2iFpYaGoLwVyaqylCqmtSXVxxXsYjnng0RatWR6e3pcXTu0PBcL1clegVKd7ZzXk6nMl3ptTCUAk2PS1OiDG7kT-dZawA9o8X9GQ/s1600/my_irda_1.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 158px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9duEz-8vGVBVFQHhmsz7-doAzhzhuAbLYKS2iFpYaGoLwVyaqylCqmtSXVxxXsYjnng0RatWR6e3pcXTu0PBcL1clegVKd7ZzXk6nMl3ptTCUAk2PS1OiDG7kT-dZawA9o8X9GQ/s200/my_irda_1.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406566569431227314" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6fDgjlcpDu7EAWQtNzPSiTnwIyUuswyZ962ZcW_8ROLPYhfl4I1hlrgFSwFWO35ATM20HocDPryytSUZZfctEFgEV35TJAxX32_RN0ZglU4Wk3DCBQpQJAiEt68iXOCgT6Y2EPw/s1600/my_irda_2.jpg"><img style="cursor:pointer; cursor:hand;width: 126px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6fDgjlcpDu7EAWQtNzPSiTnwIyUuswyZ962ZcW_8ROLPYhfl4I1hlrgFSwFWO35ATM20HocDPryytSUZZfctEFgEV35TJAxX32_RN0ZglU4Wk3DCBQpQJAiEt68iXOCgT6Y2EPw/s200/my_irda_2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406566574933560402" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihGf8U1omLfghNWjJf8BfbjmMU-UVtuQ5hf2BAp8pp_i39IxbKa2vdpCqkbGY7Ji72KGXEYYNmxbmK6XzBfPsRxcHG5tsBDgFVZHMcrRhniKXxPKoo97OBCvv2JMD5PgLuXdRfYw/s1600/my_irda_3.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 125px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihGf8U1omLfghNWjJf8BfbjmMU-UVtuQ5hf2BAp8pp_i39IxbKa2vdpCqkbGY7Ji72KGXEYYNmxbmK6XzBfPsRxcHG5tsBDgFVZHMcrRhniKXxPKoo97OBCvv2JMD5PgLuXdRfYw/s200/my_irda_3.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406566577426537922" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJkfReJsoz-Tts61WHQMM-fBKxMu-RZW4E601x1ObMZEP4igTtOQyPeZCoKPk_bxfMmw96CdsTCAePWGcDuynJDyF-bHBph8wydx-1RsCm0cCw0kKwuS7_Ta5JhIWIkFxZ1sTa9w/s1600/connecting.jpg"><img style="cursor:pointer; cursor:hand;width: 200px; height: 143px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJkfReJsoz-Tts61WHQMM-fBKxMu-RZW4E601x1ObMZEP4igTtOQyPeZCoKPk_bxfMmw96CdsTCAePWGcDuynJDyF-bHBph8wydx-1RsCm0cCw0kKwuS7_Ta5JhIWIkFxZ1sTa9w/s200/connecting.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5406566581906505458" /></a>
<h3>Infrared Transceiver Modules</h3>
Here are the pin layout and picture of the device.
<br/>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqZdSNnmi1Lq_xmHX_XnTOpBv6kQF7cqkpExR1ETiP0HoN67UugfWY3MFKYPDpujph7eP8LFWy_Q_I7Mq04pOHLqRpM4prjXJ2I2QlFfo2NlX6hH8hKVGe1Cb9oese7DU-5dv31Q/s1600/TFDU4100_1.gif"><img style="cursor:pointer; cursor:hand;width: 200px; height: 131px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqZdSNnmi1Lq_xmHX_XnTOpBv6kQF7cqkpExR1ETiP0HoN67UugfWY3MFKYPDpujph7eP8LFWy_Q_I7Mq04pOHLqRpM4prjXJ2I2QlFfo2NlX6hH8hKVGe1Cb9oese7DU-5dv31Q/s200/TFDU4100_1.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406543470710251010" /></a>
<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEnNEiODWPuXkl5Ly4OsjpyMZyErFQL9kPEpe_TQydt7V8z7B0ZZisVv0NxQep-QVUG0EIKlzdht8ROE_AUw-TdZD92uHFlwAUA34O7Pi65LlHFDfltJd6AUi1bJW5uaPE24NPYA/s1600/TFDU4100_2.gif"><img style="cursor:pointer; cursor:hand;width: 146px; height: 106px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEnNEiODWPuXkl5Ly4OsjpyMZyErFQL9kPEpe_TQydt7V8z7B0ZZisVv0NxQep-QVUG0EIKlzdht8ROE_AUw-TdZD92uHFlwAUA34O7Pi65LlHFDfltJd6AUi1bJW5uaPE24NPYA/s200/TFDU4100_2.gif" border="0" alt=""id="BLOGGER_PHOTO_ID_5406543477836324594" /></a>
<br/>
<h3>Pin Description of TFDU4100</h3>
<table border="1" style="BORDER-COLLAPSE: collapse">
<tr>
<th>Pin Number</th>
<th>Function</th>
<th>Description</th>
<th>I/O</th>
<th>Active</th>
</tr>
<tr>
<td>1</td>
<td>IRED Anode</td>
<td>
IRED anode, should be externally connected
to VCC2 through a current control
resistor
</td>
<td></td>
<td></td>
</tr>
<tr>
<td>2</td>
<td>IRED Cathode</td>
<td>
IRED cathode, internally connected to
driver transistor
</td>
<td></td>
<td></td>
</tr>
<tr>
<td>3</td>
<td>Txd</td>
<td>Transmit Data Input</td>
<td>1</td>
<td>High</td>
</tr>
<tr>
<td>4</td>
<td>Rxd</td>
<td>
Received Data Output, open collector.
No external pull–up or pull–down resistor
is required (20 k. resistor internal to device).
Pin is inactive during transmission.
</td>
<td>0</td>
<td>Low</td>
</tr>
<tr>
<td>5</td>
<td>NC</td>
<td>Do not connect</td>
<td></td>
<td></td>
</tr>
<tr>
<td>6</td>
<td>VCC1/SD</td>
<td>Supply Voltage / Shutdown</td>
<td></td>
<td></td>
</tr>
<tr>
<td>7</td>
<td>SC</td>
<td>Sensitivity control</td>
<td>1</td>
<td>High</td>
</tr>
<tr>
<td>8</td>
<td>GND</td>
<td>Ground</td>
<td></td>
<td></td>
</tr>
</table>leorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.com1