ATX Benchtop Power Supply - customizable DIY

Very important note! Only open the power supply if you know what you're doing! The capacitors can store a great deal of energy for a very long time, even after the power supply has been unplugged. By that, I mean enough energy to kill you!

There are already various models available online, and here is another one I’ve created. There are simply so many different components that it can be hard to find the right one for yourself.

Here is a great video explaining the conversion:

To allow you to design your own front panel, I have uploaded a version without cutouts, as well as the Fusion 360 files.

Here are a few things I had to figure out during the build:

• the gray SENS wire must be shorted to the 3.3V line (this is used for voltage regulation by the power supply)

• a switch is installed between the green Power wire and a black GND wire

• on my power supply, all the wires were black, but they are clearly labeled on the power supply's circuit board

• I used M4 threaded inserts for the screws

• I recommend PETG with 3 perimeters (PLA doesn't have as good layer adhesion as PETG, and the four long struts might break.)

I'm not sharing any links, since they wouldn't be valid for long anyway. I ordered the parts from AliExpress. There are countless different versions. However, the mounting size is always the same. Order the one that works best for you and is the most affordable.

A rough bill of materials:

• 120 W DC-DC 6–36 V Buck-Boost Converter

• 3.0 Dual USB-C Car Charger Socket

• Mini Round Toggle Switch, 20 mm

• 4 mm banana plugs

• M4 Threaded Inserts

• M4 x 14 inbus screw and washer

• Crimping Pliers for Flat Pins, 1.5 mm²

• Heat-shrink tubing