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Maximum value of Potentiometer.

Discussion in 'General Electronics Discussion' started by Prashant S Akerkar, Mar 31, 2018.

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  1. Prashant S Akerkar

    Prashant S Akerkar

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    Mar 30, 2018
    What could be the maximum value set for
    the Potentiometer (variable resistor) and why?

    Thanks & Regards,
    Prashant S Akerkar
     
  2. AnalogKid

    AnalogKid

    2,459
    706
    Jun 10, 2015
    It could be 1 ohm. It could be 10 million ohms.

    Your question makes no sense. Which potentiometer are you talking about? Part number? Application? Schematic? ANYTHING?

    ak
     
  3. Prashant S Akerkar

    Prashant S Akerkar

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    Mar 30, 2018
    Thanks.

    Potentiometer in a Audio Amplifier to drive the Loudspeakers.

    This project is specific to Smartphone - Audio Amplifier - Speakers interface.

    I want to hear maximum sound from the Loudspeakers for the song "God is Great"
    played on YouTube app on my Smartphone
    device.

    What could be the maximum value set for the Potentiometer to achieve this function?.

    What will be the formulas for deriving the maximum value of Potentiometer?.

    Thanks & Regards,
    Prashant S Akerkar
     
    Last edited: Mar 31, 2018
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    The question still doesn't make any sense.

    For the maximum volume the amount of resistance between your amplifier and your speakers should be ZERO.
     
  5. Prashant S Akerkar

    Prashant S Akerkar

    17
    0
    Mar 30, 2018
    Thanks.

    Potentiometer value to be designed in the
    audio amplifier circuit ?.
    How we can derive this value ?.

    I want maximum sound to be heard from the Loudspeakers devices.

    Thanks & Regards,
    Prashant S Akerkar
     
  6. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009

    read post #4 again
     
  7. kellys_eye

    kellys_eye

    4,275
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    Jun 25, 2010
    (a) The maximum value a potentiometer can be is written on it.

    (b) The minimum value a potentiometer can be is zero.

    The fact that it is a potentiometer means it can be set to any value between (a) and (b) above.
     
  8. Prashant S Akerkar

    Prashant S Akerkar

    17
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    Mar 30, 2018
    Thanks.

    Thanks & Regards,
    Prashant S Akerkar
     
  9. AnalogKid

    AnalogKid

    2,459
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    Jun 10, 2015
    Please post your schematic so we can see what you are talking about. Be sure to have a reference designator for each component and show all power sources.

    ak
     
  10. BobK

    BobK

    7,682
    1,687
    Jan 5, 2010
    You seem to have some misconceptions about the role a potentiometer plays in an audio amplifier.

    The maximum output of the amplifier is determined by:

    1. The supply voltage and the maximum voltage swing of the output stage.
    2. The impedance of the speaker.
    3. The efficiency of the speaker.
    4. The gain of the amplifier
    5. The level of the input signal.

    To get the maximum output, the level of the input signal times the gain of the amplifier must equal the output swing of the amplifier. You will notice that no potentiometer has been mentioned.

    The potentiometer used to control set the level of output merely selects anywhere from 0% to 100% of the input signal to pass on to the amplifier. The output is maximum with it is set to pass 100%, which is when the resistance between the input and the feed to the amplifier is zero.

    Bob
     
    Prashant S Akerkar likes this.
  11. Prashant S Akerkar

    Prashant S Akerkar

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    Mar 30, 2018
    Thanks Bob

    Thanks & Regards,
    Prashant S Akerkar
     
  12. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Meaningless Closed.
     
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