I am trying to modify an old 350W PC PSU in order to run some 12v and 9.6v cordless tools.
I put 2 10Ω 5W resistors in parallel between 5V and ground and I shorted the green wire with ground. I can easily run a 5V screwdriver directly from the molex. I can also run a 12V motor with no load directly from the molex.
But when I try to run my 9.6V drill from the 12V rail the PSU turns off. I can run this drill from a 12V wall adapter and it runs fine but the adapter doesn't provide enough amps so the drill is weak.
What could be the problem with the power supply? Thanks a lot.