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DC motor circuits - SparkFun Electronics
Transistor Diode 220 Ω or 330 Ω resistor LWTL: DC Motor! 18! Replace the Switch with a Transistor! A transistor allows on/off control to be automated and it allows switching of more current than an Arduino digital pin can supply.! +5V P2N2222 Pin 9 330 Ω 1N4001 diode NPN transistor Pin 9 or another PWM pin drives the transistor base!
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