Using an ATX power supply

tk26:

RuggedCircuits:
It works pretty well. Watch out for power supplies that have minimum load (current) requirements. If you don't draw at least this amount of current from the various supplies, it will not regulate properly and you could end up toasting something with improper voltage (e.g., the "5v" output ends up at 6.5V or something).

Thanks for the warning. I had heard about minimum load requirements but I wasn't aware I could toast anything if I didn't meet them.

Well it usually is solved simply by wiring a lamp mounted inside or onto the PS, or a power resistor of the correct wattage. There is ton of info on the web about utilizing PC supplies in a standalone mode. This is about the cheapest DC power supply per watt available to a hobbyist, often gotten free.