I want to use a transistor to control a 5v power source but Im confused on how to control the base pin.
How much voltage can I put on the base pin? I've seen tutorials which use 5v with a 1k resistor, but doesnt this exceed the saturation voltage of 0.7v? Also if I were to use a voltage divider circuit to lower the voltage, would this provide enough current to turn on the transistor?
Im using a tip120 transistor. Thanks for any help