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Article on Replacement of potentiometers in todays electronic

Discussion in 'Electronic Design' started by [email protected], Jan 6, 2014.

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  1. Guest

    Hi all

    I once read an article on how potentiometers are replaced in todays electronic, by digatal ways....

    Does this ring a bell for anyone?

  2. amdx

    amdx Guest

  3. Jeff Urban

    Jeff Urban Guest

    In brownwares I only see actual pots where the voltage is too high or
    there is another reason, such as high end audio.
  4. Ever seen a potentiometer in a remote control? In todays monitors? In a
    mobile phone? An MP3 player?

    petrus bitbyter
  5. Greegor

    Greegor Guest

    Still very common in amplified speaker sets
    to use with computers or MP3 players.

    Cheap alarm clock radios still use pots.

    Google on "digital potentiometer".
    I just got got "About 1,540,000 results".

    Most of the chips for that are just over a buck.

    Some of those are for rotary controls
    but some others are for up/down buttons.

    Some of these chips appear to be made
    to drop in place of variable resistors,
    while some others seem to be integrated
    into amplifiers.

    If you've already got a uC it can be
    done without such a chip using two
    input lines w/ buttons.

    Expect production levels of carbon
    potentiometers to stabilize at a
    very low level (specialty item)
    because of fewer uses.

    One big plus is that lots of these
    digital potentiometers work with
    remote control input.
  6. miso

    miso Guest

    I've got a decent stash of 10 turn posts. Some of the cheap PCB
    variety. But a few are the 10 turns with attached verniers. Long live

    They do make Chinese knock offs:
  7. josephkk

    josephkk Guest

    Well not exactly, i saw a motorized pot controlled by a remote control.
    (Medium grade stereo). Is this close enough for you?

  8. Guest

    Even there (high-end audio), it's digital with perhaps a rotary
    encoder to make people happy. ...or by "high-end" did you mean
    "audiophool" class? ;-)
  9. Guest

    MP3 players? My iPod doesn't have a pot. ;-)
    "Digital potentiometer" is one of the devices one uses to avoid pots.
  10. Greegor

    Greegor Guest

    G > Google on "digital potentiometer".
    G > I just got got "About 1,540,000 results".

    krw > "Digital potentiometer" is one of
    krw > the devices one uses to avoid pots.
    krw > ;-)

    I assume they don't all work exactly the same.
    How many of them work like voltage dividers
    and could be subbed in for older pots?
    There are others that are not just voltage dividers, right?

    It occurs to me that some are probably designed
    to work with rotary encoders rather than
    simple up/down buttons, too.

    Through a uP they can function as either
    linear or audio taper, I suppose.

    Do any have setpoints that don't get lost
    each time the device powers down?
  11. Artem

    Artem Guest

  12. Oh, there are still pots and there will be pots for quite some time. But
    when I have to ring a bell for every pot that was replaced by electronics I
    would be deaf long before I was done.

    petrus bitbyter
  13. A good old analog pot cannot be beaten that easily. Not for serious audio
    that is ;)

    petrus bitbyter
  14. Guest

    A good old analog pot cannot be beaten that easily. Not for serious audio that is ;) petrus bitbyter

    And now legal in Colorado.
  15. Guest

  16. Greegor

    Greegor Guest

    A good old analog pot cannot be beaten that easily. Not for serious audio that is ;) petrus bitbyter

    mako > And now legal in Colorado.

    Didn't the state of Washington legalize pot also?
  17. Guest

    A digital potentiometer is just that. It has a resistor and a wiper;
    a three terminal device.
  18. Guest

    I noticed the MCP4201 here, which recalls its position - that is what I need.
    For eg LM335 I need this, as the LM335 is not as exact as one might want - even the 1 degree version
    Or if I use an NTC.

    Then again, I could just test is and tell my uP that minimum is 0x04 and maximum is 0xe7 and it will calculate from there :)

    Does this change your opinions?
  19. Greegor

    Greegor Guest

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