Sometimes there is need for power supply and only thing with hand is old atx psu. It needs some tricks to start and molex connectors to use, if hacking all the wires are out of the question, help is here. With this little box all atx 1,0 compatible power supply's are now practical to use to somewhere else. With this version only limitation is +12V with only one wire from psu, do not over load this. I'm not going to tell you how to connect this, but I'm telling what you need:
ATX 1.0 connector from old motherboard
Power switch suitable for 13X20 hole (might be 12X20)
5mm LED and suitable resistor (1K for 5V)
4 banana connectors for 5mm mounting holes
4 screws from old printer or somewhere...
I will draw upgrade to this someday with molex connectors, so 12V can be used to maximum load.