I had an old 200W power supply from a ****ty Gateway machine lying around and as it's pretty much usless for most PC's (it doesn't even use a standard ATX mounting) I thought I'd turn it into a test PSU so I can check fans or USB powered devices, or just when I need either 12v or 5v power for something.
So here's the PSU as I started:
With it opened up you can see all the wires going to the circuit board. I don't need most of these.
So I trimmed it down to only the ground wires, the yellow 12v wires, the red 5v wires and the green wire I need to turn on the PSU.
Rather than use the original hole in the top where the wires came out before, I fed them through a small hole that was already in the end and then put heatshrink over the wires and fed it through the hole before shrinking it down. that will stop the wires from having any chance of wearing through and shorting.
I thought I still had a couple of small project boxes lying around, but if I do I don't know where, so tomorrow I'll head down to the electronics shop and pick one up. I'm going to have the wires feed straight into the small project box which I'll mount on the end of the PSU.
I'll have a couple of molex plugs, a couple of USB plugs and a couple of three pin fan plugs mounted in the project box, along with a switch for the PSU.