Lab: Using a Transistor to Control High Current Loads with an Arduino

1）Prepare the breadboard

Arduino nano 33, Potentiometer, motor, NPN, diode

First add a potentiometer and connect a transistor to the microcontroller，then connect motor and power.

control the motor with a potentiemeter

the only problem i have is the motor running so weird. i through it is not working at the beginning but it suddenly turn a second and stop.