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Topic: Using resistances (Read 489 times) previous topic - next topic

ignacillo

Hi, I'm begginer in electronic and I connected a dc motor and a led to digital pins in PWM mode of the arduino board without a resistance (I connceted them directly), I want to know if do that is damaging for the arduino board or only is bad for the Led or the motor that use 5v, for that I think that the motor don't need a resistance. It's true?
Thanks.

Magician

You damaging arduino. Use resistors with leds, for motor you need transistor.

JimboZA


.... for motor you need transistor.


And a diode to take care of the back emf when the motor stops, as explained here.

meArm build blog:     http://jimbozamearm.blogspot.com/

Please don't PM for technical advice. Firstly my advice is sometimes wrong, and second, in the forum you get a broader, more timely, range of responses.

The Clever Monkey


Hi, I'm begginer in electronic and I connected a dc motor and a led to digital pins in PWM mode of the arduino board without a resistance (I connceted them directly), I want to know if do that is damaging for the arduino board or only is bad for the Led or the motor that use 5v, for that I think that the motor don't need a resistance. It's true?
Thanks.


See here: http://www.arduino.cc/playground/Main/InterfacingWithHardware#Physical_Mechanical
I yield() for co-routines.

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