Okay, looks like I've got an AT then. It is out of a quite old computer.
There is no grey or green wires either.
So I don't need to do anything else to this power supply?
I was intending to use this to provide power to a micro-contoller and some transducers all 5 volts and I was going to use the 12 volt outputs to power the coils of some mechanical relays.
I've heard these power supplies create a lot of noise. Do you think it will be a problem in this circuit? If so what might be the best filtering methods.
Thanks again.