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ATX Power Supply Tester by JLCPCB

July 30, 2020 by Catherine Sui
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This project is used to check whether the ATX power supply is working normally

Hardware

This project is used to check whether the ATX power supply is working normally

This project is used to check whether the ATX power supply is working normally

Step 1: Description

JLCPCB-2.png

There are kinds of ATX Power supply tester on the market now, but they are not that reliable in my opinion, so, I designed one which I think can meet our requirements.

Step 2: Features

JLCPCB.png

1 The general method to test the ATX power supply is to take a wire short to PS_ON and GND to start, and then take the multimeter to test the output value of each voltage one by one after starting.

2 Neither reliable nor convenient. So based on STC15 51 MCU made an ATX power supply tester. It can be used to test the ATX power supply and display the voltage value of all five channels of ATX power supply in real-time (including -12V voltage). Suitable for friends who need to do ATX power maintenance.

3 All ADC ports are protected to withstand a certain level of overvoltage to prevent accidental high voltage damage due to faulty power supply. There are also voltage test points on the board, which can be measured with a multimeter to obtain a more accurate voltage.

4 Source code all shared, can be secondary development to improve accuracy.

When it gets connected, it will act like that.

Step 3: Schematics

Schematic.png

Also enclosed the BOM List and program files, feel free to do the secondary development.

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