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Topic: Using resistances (Read 449 times) previous topic - next topic

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.

My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

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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