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Thread: Display potentiometer position

  1. #1
    Associate Engineer
    Join Date
    May 2013
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    Display potentiometer position

    It's been a while since I've done this stuff, and I'm after something specific that I'm having trouble with.

    I have a potentiometer, and I want to display it's position in an absolute on an lcd or led display from 0-25. The reistance is 400ohms to 4000ohms. This is for an automotive application measuring suspension stiffness that is controlled hydraulically. As it goes up the pot turns.

    I have an electrical engineering and c programming history.

    Thanks for your help.

  2. #2
    Technical Fellow jboggs's Avatar
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    Mar 2011
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    Myrtle Beach, SC
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    908
    We're good but we're not mind readers.
    Your question is...?

  3. #3
    Associate Engineer
    Join Date
    May 2013
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    Sorry, I'm looking for a suitable display and control board, and a way I can take the numeric ohm output of the pot and perform the function 25/100*(input/5000) to display the number. My previous experience was diagnosing circuit boards and replacing faulty components so while I know how the stuff works, I don't have hands on with this sort of thing.

  4. #4
    Technical Fellow
    Join Date
    Feb 2011
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    Still pretty vague, is the suspension turning the pot or are you?

    Are you looking for a finished display or are you wanting to build it yourself?

    There are many things you could use to to monitor the pot resistance, but unless it is a wire wound pot, you are not going to get a clean linear output.

    You could attach Quadrature Encoder for much better step results rather than trying to use the resistance.

    Try looking at Arduino, Raspberry Pi, Basic Stamp and a whole bunch similar programmable devices, or even PIC devices but the latter will require more effort in designing and building the electronics.

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