This is driving me insane. - I've tried a TIP31 (lights dimly) and an IRF730 Basically, I have a 12v rail, which goes to the collector (12+) 0 to ground, the circuit is fine, if i feed 12v directly from the rail, both transistors light up the 12v bulb... but, connect the 5v to the transistor, the t…

Control a 12v from 5v.

JoeN August 13, 2012, 9:01pm 11

Nice. I'd say you figured that one out.

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