Introduction: Converting Computer Power Supply to a Lab Bench Using ATX Breakout Board (8$)

About: I really like to experiment and build stuff. I also like to share the things I learned from these various projects. I hope you will find this information useful and that it will inspire you to build great thin…

Like many of you, I wanted to use a lab bench power supply for my electronics. Unfortunately, they can be very expansive so I wondered if there would be an easier and cheaper way to build one. I came across many great instructables explaining how to modify the power supply from an old PC computer to a benchtop, but they all required skills and tools I don't have. I finally found out that I could simply use a cheap ATX breakout board. This is by far the easiest solution for the conversion of an ATX power supply to a DC lab bench power supply. I wanted to share my experience since there is not much info on this board. I hope you will find this product review useful.

In the video, you can see how to replace the fuses and build a small case for the ATX breakout board.

This board can also be used with LM317 modules to create a variable power supply, check my LM317 video if you want to learn more about adjustable DC output or click here to see how to use a multimeter to measure voltage and amperage.


Items you need for this homemade benchtop power supply and ATX power supply hack :

-ATX breakout board (, CA, UK, DE, FR) (Aliexpress) (Amazon)

-Banana plug to alligator clip connectors (eBay) (Aliexpress) (Amazon)

-ATX power supply (You can get one from an old computer or buy a new one. They cost about 30$ US on eBay)


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Warning and disclaimer:
ATX PSU can deliver enough current to cause serious injuries or death. I am not responsible for any accidents or damages.

Step 1: Build a Case for the Breakout Board

I used a food container for building the breakout board case. It measures 5.75 x 2.5 x 1.5 inches. I removed portions of the lid to get access to the connectors, the fuses and the switch. I packed the bottom of the box with layers of foam for a better fit. The board includes 5A fuses, but you can easily replace them if needed.

Step 2: Plug It and It's Ready to Use!

You can now enjoy your lab bench power supply! Check the video for more information or see my post about the ATX breakout board on Science Improved.