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 th...

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.



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    6 Discussions


    1 year ago

    I was just planning to make a bench power supply with a PC SMPS but due
    to lack of time i couldn't finish my project, anyways thanks much good
    brother for the share.

    1 reply

    2 years ago

    Welcome to the club: Just a note to let you know I have added this instructable to the collection: Encyclopedia of ATX to Bench Power Supply Conversion


    Take a look at about 70 different approaches to this project. This topic is one of the more popular of all instructables.

    1 reply
    DIY Electronicruss_hensel

    Reply 2 years ago

    Thank you! I'm amazed by the number of views I already got for my first instructable. This site is so cool and full of great ideas!