Dell 2320Lf 23' display, no power issue, a quick check found out 2 diodes possibly short circuit. Either diode D854 or D855 or both Original parts = SR520, try to replace with equivalent part or higher, I replace with SB560 from old power supply board ... Read More »
This W5500 ethernet module available at Lazada for less than USD6 Just search for W5500 Connect through SPI 7 connections needed from the ethernet module (5V, GND, MISO, MOSI, SCK, RST & SS) to Arduino Mega 2560 Arduino Mega 2560 pinout Connection in action Get an example code from https://www.arduino.cc/en/Reference/Ethernet Make sure to compile with Ethernet2.h because this module is using... Read More »
Mount the dash-cam accordingly. Tuck in the usb cable in the headliner until you reach the corner panel. Pop up the corner panel. Careful not to break the panel clips. The are 5 of them. Run down the cable following the existing cable through an opening just beside the dashboard speaker. And it should come out somewhere here, behind the... Read More »
There are several references on how to do this such as; CT sensors - Interfacing with an Arduino How to build an Arduino energy monitor - measuring mains current only. For my case, I would like to try it first before start buying a CT sensor. So I come out with below idea, using toroid inductor/coil for testing. Live wire 240VAC... Read More »
Symptom, no backlight, but the LCD it self is OK. Inverter board (left) and main board (right). Inverter board close up. From my observation, this board will works when hot but not when cold. A lot of try and error to trace this but finally, found the culprit. This cap value determine the 5001C PWM controller short circuit protection timing.... Read More »
Before... Get a white LED strip. 5 meters = USD7 Mount it... End result... ... Read More »
Just to share how to fix Noxxa Multifunction Pressure Cooker no power issue. Symptom: The front panel didn't light up. So let's open it. Start check the simple things first, temperature fuse continuity? OK, any swollen capacitors? nope! Next, power it up and check is there any output before (AC) and after the bridge (DC)? YES. Regulator (7805) output? NO!... Read More »
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. A bad capacitor, several diodes shorted, a blown fuse and blown SMPS Power Switch. Luckily the digital board, LCD and back-light still OK. This is the heart of SMPS, the chopper (PWM) controller... Read More »
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