Okay dumb question (since I'm not a complete noob)
I have a servo on its own power supply (raw port of the arduino)
I need to be able to turn on and off the power to the servo using the arduino.
I'm thinking about putting a resistor to the servo power line, then have something with a variable resistance (like a potentiometers) that control with the arduino (thus making resistance higher or lower than the resistor to the servo)
What electronic part am I looking for?