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    Suggest me a way to rotate Potentiometer know through microcontroller

    In one of my project i have to rotate potentiometer knob through microcontroller . I have to distribute the 360 degree rotation of knob in ten steps. Is their any other way without using servo or stepper motor ??

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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    Quote Originally Posted by 0killingsoul0 View Post
    Is their any other way without using servo or stepper motor ??
    Maybe,
    But what's wrong with using a servo or stepper ?

    - - - Updated - - -

    Also,
    If all you need is variable resistance, you'll do much better with a digital potentiometer instead of rotating a mechanical one...



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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    for me its better to user stepper motor since you are controlling it by steps



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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    I tried with stepper but running a stepper motor is a heck of job. Firstly finding a right sequence to rotate is difficult , then it draws too much current ( about 1 to 1.5 amperes) , thirdly stpper motor i tried with rotates with too much slow speed.


    I haven't tried servo, will it be easy doing it? Cant there be some other electro mechanical mechanism to do the job?

    - - - Updated - - -

    I tried with stepper but running a stepper motor is a heck of job. Firstly finding a right sequence to rotate is difficult , then it draws too much current ( about 1 to 1.5 amperes) , thirdly stpper motor i tried with rotates with too much slow speed.


    I haven't tried servo, will it be easy doing it? Cant there be some other electro mechanical mechanism to do the job?



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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    A hobby grade servo is easy to rotate to a desired angle - this is done with a PWM peripherial.
    But again, why don't you use a digital potentiometer ?



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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    digital potentiometer ic's are difficult to find here in Pakistan or you will have to import it, which takes time , which i dont have :). Can you name some commonly used digital potentiometers so i should have a look at local market?



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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    http://www.digikey.com/product-searc...meters/2556350

    Control a mechanical potentiometer via a motor that's itlself controlled by an MCU only to generate an analog signal for another electrical system is the correct way to spell: "utterly unreliable".

    I suggest you use a digital potentiometer or an MCU with a DAC peripheral (or a seperate DAC IC).


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  8. #8
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    Re: Suggest me a way to rotate Potentiometer know through microcontroller

    Quote Originally Posted by shaiko View Post
    http://www.digikey.com/product-searc...meters/2556350

    Control a mechanical potentiometer via a motor that's itlself controlled by an MCU only to generate an analog signal for another electrical system is the correct way to spell: "utterly unreliable".

    I suggest you use a digital potentiometer or an MCU with a DAC peripheral (or a seperate DAC IC).
    Ok i will have a look at local market if i can find one.



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