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DC motor circuits - SparkFun Electronics
Pin 9 or another PWM pin drives the transistor base! 10/25/12! 10! LWTL: DC Motor! 19! Alternative locations for the transistor! Moving the transistor (and any switch) between the power supply and the motor adds a bit of safety by tying the motor to ground when the system is idle! +5V PWM signal NPN transistor PNP transistor +5V PWM
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