I decided to build an H-bridge motor driver out of transisters, since I have half a dozen TIP41c's and 42c's. Before I did, though, I breadboarded a single TIP41c hooked up to the motor I was planning on using; basically just a switch. It would't drive it at all, though the same set-up worked fine with a smaller motor.
The one I want to use comes out of a 6v power screwdriver. I measured the stall current at about 4 amps and unloaded current at 400 ma. Seems like the TIP 41c should handle that, though maybe the stall current is making it fail to start?
Any help?