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motorized potentiometers

Discussion in 'Electronic Components' started by Andrew Gabriel, Oct 7, 2003.

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  1. Does anyone know a source of motorized potentiometers,
    or a small motor unit which can be added to a regular
    potentiometer? I also want to be able to turn the pot
    by hand ideally. This is a 2-gang 100k linear pot
    (actually, value probably doesn't matter much, but
    should be linear, not log).

    Would be particularly interested in a UK supplier,
    but pointers elsewhere welcome too.
     
  2. Well, Sony uses them in some stereo receivers, so you could get the
    manual for one and check out their parts department. Dunno if they
    are linear, though there may be some balance pots that are...

    Other stereo manufacturers may have similar parts...

    Of course you've checked out the 1260 hits at
    http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=linear+motorized+potentiometer

    8*)
     
  3. Digikey or Mouser (don't remember which, maybe both) list some.
     
  4. Guest

    All Electronics has motorized 10 and 20 K linear pots.
    http://www.allelectronics.com/cgi-bin/category.cgi

    Perhaps you could adapt one of them to your needs.
     
  5. rgb

    rgb Guest

    It there some of those with encoder also ?
    ;-)

    This could be fun to play with !
     
  6. Actually, I'm intending to use the second of the dual as
    an encoder. The application where I want to use this currently
    uses just a single manual pot, and I want to add remote
    control, but also electrically isolated from the original
    equipment.
     
  7. rgb

    rgb Guest

    That seems to be a good way, you will need only mux(if y have many pot)
    and adc to scan current settings. I was also thinking about some
    digital encoders ... probably easy to fix on the shaft but surely more
    pricey :)
     
  8. Guest

    There's a dual 20K on the web page I posted. When
    I clicked on the url I posted to verify that, I got
    an error message, so here's a different way. Click
    on the url below, then enter motorized in the search
    box and click search.
    http://www.allelectronics.com/
     
  9. Thanks.
    Incidently, what does the 'TAPER' mean here?
    I saw that used in the description of most of the
    devices I looked up.
     
  10. It's how the resistance varies as you turn the pot. Linear would be
    used for setting voltages, audio is logarithmic, as your ears aren't
    linear (you hear small differences better when it's quiet).
     
  11. Ah, got it.
    I knew what Linear and Log meant -- I thought 'Taper'
    was some other unrelated property like a funny shaped
    drive shaft or something ;-)
     
  12. Gary Tait

    Gary Tait Guest

    Whereas On 9 Oct 2003 14:32:42 GMT,
    (Andrew Gabriel) scribbled:
    , I thus relpy:
    Thats better than thinking a push-pull amp had knobs you pulled and
    pushed to adjust them, instead of tutning them.
     
  13. Dave VanHorn

    Dave VanHorn Guest

    I always thought it would be funny to add motorized pots and a small micro,
    to an existing commercial amp.

    That way, when someone messes with your settings, the amp will dial them
    back after a short delay. You could even have it start messing with the
    user, if he continues to mess with the amp. :)
     
  14. Use metal knobs on plastic shaft extenders. Then, the second time it
    is messed with, you get a good tingle! ;-)
     
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