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Control a motor using NPN transistor Wiring it up To set up the NPN transistor with the motor in the correct way, follow the instructions below. The image demonstrates how to connect the wires between the NPN transistor, the motor and the Arduino. Once they are connected to each other, connect the Arduino to your computer using the USB cable. Connections from the NPN transistor: • NPN emitter pin → Arduino GND pin • NPN base pin (middle pin) → Arduino pin 3 • NPN collector pin → Motor first wire Connections from the motor: • Motor first wire →...