I'm attempting to drive a 12V motor using the Arduino to supply a logic signal to switch it on and off.
I've got a TIP120, +12V conected to Collector, Diode from emitter to collector, one of the motor leads on the emitter, the other to ground.
When I put a logic signal from the arduino through a 1K resistor to the Base, I get a +5V signal out to the emitter...
Shouldn't this be 12V? what am I doing wrong?