ATX Bench power supply conversion

Brian — Wed, 22 Oct 2008 14:29:59 +0000

I decided the most prudent thing to start building now that I have a worksapce setup was a bench power supply. Since I had quite a few old ATX power supplies from trashed or gutted computers, an ATX conversion sounded like a good choice.I found this instructable, which gave some good pointers and especially helped with figuring out which color wire goes to what. The only difference I made between the one in the instructables and mine, is the load on the +5V line. In the instructable, the guy uses a 10ohm 10W power resistor, I opted for two 1ohm 10W resistors in series after reading this. It seems that increasing the load on the +5V line increases the stability and level of the other output voltages. Here are some pictures of the completed power supply.

Robot Penguin » bench

ATX Bench power supply conversion