12VDC from computer power supply WHILE COMPUTER IS RUNNING?
I need a 12VDC power supply to do some bench testing. I have a computer by my workbench which has at least one free Molex connector coming out of the PSU. I know I've seen Instructables that show how to make a bench power supply from a disconnected computer PSU, but would it be a really terrible idea to run wires out the back of the computer case to my bench and use them to test circuits?
What are the potential pitfalls, and what are some steps I could take to make them less likely? I'm thinking fuses on the incoming power lines are the first step.