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  1. 01-30-2012, 10:02 PM #1
    737NUT
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    Need some help finding a potentiometer

    Hey Guys,
    I have searched for a few hours for a special precision potentiometer that I need for my altimeter project.
    It needs to meet the following specs,

    5K resistance
    20 turn (could be 25 turn)

    1/8" shaft (1/4" could work)

    7/8" to 1" body diameter

    The only ones I could find where 3"+ in diameter! Yikes.

    Thanks for any input,
    Rob
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  2. 01-30-2012, 10:41 PM #2
    Westozy
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    Re: Need some help finding a potentiometer

    Hi Rob, have you considered a small gear drive to multiply turns? Could be done quite easily if you have got some depth in the guage build!

    Cheers Gwyn
    Aerosim Solutions

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  3. 01-31-2012, 07:57 AM #3
    737NUT
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    Re: Need some help finding a potentiometer

    Quote Originally Posted by Westozy View Post
    Hi Rob, have you considered a small gear drive to multiply turns? Could be done quite easily if you have got some depth in the guage build!

    Cheers Gwyn
    Aerosim Solutions
    Hi Gwyn,
    Yes, I may have to use a 10 turn but that will hurt my resolution as then the pot will only turn half a revolution for every 1000ft. I am building a 0-20K ft altimeter and hence the need for a 20t pot. Would make for better accuracy with a 20t.
    Rob
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