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Potentiometer Help!!!

Discussion in 'Electronic Basics' started by VideoGuy, Jul 20, 2004.

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  1. VideoGuy

    VideoGuy Guest

    I am using some controller boards to run 2 12v motors. The board that I am
    using needs a 5k pot to serve as the input. The pot center is neutral when
    turned to the right the motor goes forward and when turned to the left the
    motor goes in reverse. I would like to use a 10k pot joystick that I
    already have purchased since it is what would work best for the way I have
    designed the control system. Is there anyway to make a 10k pot act like a
    5k pot or is there a way to maniuplate the signal??? Help!!!
     
  2. Jamie

    Jamie Guest

    it depends.
    the controller board is now using all 3 wires on the 5k pot its a got
    chance that 10k will work just fine.
     
  3. andy

    andy Guest

    chances are it will be OK just to substitute it. usually a pot is wired
    like this:

    +ve --------------
    |
    []
    []
    []<-----wiper (output)
    []
    []
    |
    ground -----------

    The voltage on the wiper will change just the same whichever value pot you
    use. The only problem is if it's wired differently, or if the circuit is
    expecting to be able to draw more current than the higher value pot can
    cope with. (As current is drawn from the wiper down to ground, it changes
    the output voltage slightly).
     
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