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Creating a feedback for motor speed controller

Discussion in 'Arduino' started by Albert10, Dec 3, 2017.

  1. Albert10

    Albert10 New Member

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    Hi, am working on this project
    of controlling the speed of a motor but i would like to add a feedback circuit that uses transistor , mosfet , resistors to the circuit in youtube video so that my speed stays at 1000rpm.
     
  2. alec_t

    alec_t Well-Known Member Most Helpful Member

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    Welcome to ETO.
    If you use a standard DC gearmotor of the type shown you will need to attach a sensor of some sort to the output shaft so that the rotation speed can be determined. The Arduino, when suitably programmed, can respond to the sensed speed and adjust a PWM (pulse width modulated) drive to the motor to maintain a given speed.
    The motor will also need a reverse-biased diode connected across its terminals to suppress high voltage spikes which can destroy the driver transistor. I note that no such diode is apparent in the video :eek:!!
     
  3. MaxHeadRoom78

    MaxHeadRoom78 Active Member

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    See the method for precise RPM control using a Bresenham filter at the RomanBlack.com site.
    Max.
     
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