this might be a misunderstanding or mistake. The output pins are not able to sustain current over 20 mA for any extended time, in fact you should read the ATMEGA328 datasheet.but on another forum someone said the output pin of an arduino generates, almost no current, so where is the high current coming from?
Why not the emitter side I really want to know?You should put the motor on the collector of the transistor, and the base resistor should be calculated to provide 1/10th of the needed motor current.
Because you will have to bias the base with a voltage that is higher than the voltage on the load.Why not the emitter side I really want to know?
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