In this post, I’ll show a DIY power supply I made from an old computer PSU. This is a great way to get a fairly powerful lab power supply with a range of different voltages for cheap. I used a breakout board I bought online as it’s much quicker and simpler than drilling holes for all the connectors into the case and then soldering all the wires.
The connector of the PSU can simply be plugged into the PCB which makes everything easy, nice and tidy. The breakout board has a switch to turn the PSU on and off, a USB plug and four outputs(-12v, 12v, 5v, 3.3v) with banana plugs.
I drilled four holes into the PSU case and mounted the PCB onto it with some plastic spacers.
This PSU can also be used to provide the power for the smaller adjustable PSU I wrote about in this post. The max voltage will be only 12V. However, it will provide lots of current with a stable voltage and clean output.