Originally Posted by Glowster21
It is a 12volt bulb on the 5 volt line, and a 1 ohm resistor on the 5 volt line. When it stays on, I can charge a battery at 6 amps and break in a motor etc. It is a 3oowatt supply that was new.
What is the wattage of the 12v bulb? It actually sounds like there is too much load, which is tripping the PSU's overload protection cut-off.
IMO I wouldnt use a 300w PSU, I recommend 400w minimum.
What are the amp ratings on the PSU label for the 3.3v, 5v, & 12v lines?
@Flysti- purpose built? Most purpose built Power supplies ARE computer PSU's!
There is no harm in saving money AND ending up with a better product as long as you know what you are doing. On any related thread about converting PSU's I make sure to warn people of the possible dangers if they're not careful.