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Topic: Using resistances (Read 439 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.

No PMs for help please. Not active on this forum any more.

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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