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Potentiometer with two extra connectors

Discussion in 'General Electronics Discussion' started by jacklam2048, Feb 24, 2021.

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  1. jacklam2048

    jacklam2048

    19
    0
    Feb 22, 2021
    Hi,
    I bought a potentiometer (the one at the left in the picture) recently. I found that it has two extra legs (as I indicated by the red arrows) which differs from the potentiometers I normally used (the one at the right in the picture which does not have these two legs).
    Can anyone tell me what's the purpose of these two extra legs ?
    Thank you very much !
     

    Attached Files:

  2. Robu.in

    Robu.in

    2
    2
    Feb 6, 2021
    Those two pins appear to be mounting pins. They are used for mounting the potentiometer onto a PCB.
     
  3. hexreader

    hexreader

    126
    42
    Apr 21, 2011
    That is a combined on/volume pot. You will feel a click when you turn pot fully anti-clockwise. The extra two pins will go open circuit when fully anticlockwise.
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

    11,813
    2,752
    Nov 17, 2011
    +1 for the switch,
    -1 for the mounting pins.
     
    shrtrnd and JWHassler like this.
  5. bertus

    bertus Moderator

    2,162
    810
    Nov 8, 2019
    Hello,

    From adafruit: Panel Mount Right Angle 10K Linear Potentiometer w/ On-Off Switch
    https://www.adafruit.com/product/3395
    There you will also see the posted picture.
    The resistance value may differ on your potentiometer.

    Bertus
     
  6. jacklam2048

    jacklam2048

    19
    0
    Feb 22, 2021
    Thanks for all ! Yes, I realized the two extra legs act as ON/OFF switch while the other 3 legs act as the pins for potentiometer.
    Thanks a lot to all !
     
  7. AnalogKid

    AnalogKid

    2,542
    724
    Jun 10, 2015
    Nope - switch.

    ak
     
  8. Robu.in

    Robu.in

    2
    2
    Feb 6, 2021
    Thanks for the info. Learning something new every day.
     
    davenn and ratstar like this.
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