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Is it Save To Use Servos With Just An Arduino?

davidhaw

I have bad experiences with using a motor and frying my Arduino, so is it save to use servos with an Arduino with no diodes? If yes, why?

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  • Hi David,

     

    The servo should be fine. I'm assuming you are planning to power the servo from an external power source in which case you are just sending a control signal to the servo from the Arduino and this is just driving into the control circuitry of the servo itself.

     

    It might be interesting to work out why you are damaging your Arduino when using motors. How are you connecting up the motor? Are you putting in any protection to deal with back EMF when the motor is turned off?

     

    Best Regards,

     

    Rachael

  • in reply to rachaelp

    Also the project with the servo is here: Servo Motor Control with an Arduino

     

    In this project they didn't use a external power supply like you suggested.

  • in reply to davidhaw

    My reason for mentioning using an external power supply was simply because it wasn't stated what the servo was and I being cautious in case you were using a big servo which had significant current draw which might overload the regulator on the Arduino. There is a motor inside the servo but I would expect them to deal with back EMF inside the servo itself otherwise the internal control circuit would likely get fried.

     

    Best Regards,


    Rachael

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  • in reply to davidhaw

    My reason for mentioning using an external power supply was simply because it wasn't stated what the servo was and I being cautious in case you were using a big servo which had significant current draw which might overload the regulator on the Arduino. There is a motor inside the servo but I would expect them to deal with back EMF inside the servo itself otherwise the internal control circuit would likely get fried.

     

    Best Regards,


    Rachael

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