So we have recently replaced our computer and the wife has given me permission to use the old one however I choose. I'm going to turn it into a stir plate. I understand the directions pretty well but have a question regarding the power cord.
Could I just use the power supply off the old computer? The fan is currently plugged into it somehow already. If I wanted to add a rheostat it would be spliced into the cord from the fan to the power supply... Right?
If I use the power supply off the computer, would it be a waste of electricity or would using a phone charger be a better use of electricity?