It is always good to reuse and repurpose old electronics. This project shows you how to build an adapter that can turn an old computer power supply into a bench power supply for your workshop. Any ATX power supply can be plugged into this adapter. The adapter then connects the appropriate wires to a series of output terminals. The result is a high capacity power supply that can output 3.3V, 5V, 12V and -12V. This is a great way to power some of your electrical projects.