Pot Orientation Question

Discussion in 'The Projects Forum' started by tracecom, Sep 15, 2012.

  1. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    In the following schematic, with the pot fully clockwise, there is minimum resistance between pins 2 and 3, and maximum resistance between pins 1 and 2. In that condition will there be minimum or maximum drive to pin 9 of the audio amp? (I think I have the pot backwards.)

    Thanks.

    [​IMG]
     
  2. #12

    Expert

    Nov 30, 2010
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    Minimum...
     
  3. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    I was afraid of that, but better to find out now than after I have PCB's made. :rolleyes:

    Thanks.
     
  4. #12

    Expert

    Nov 30, 2010
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    If you're going to make circuit boards before you build and test this circuit, you should also know that your volume controls are installed completely wrong.

    Pin 3 goes to the input jack, pin 2 goes to the amplifier chip, and pin 1 goes to ground.
     
  5. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    Yeah, that concern was what prompted my original question; I thought I had it wrong. Here is the corrected schematic. If you see anything else, please point it out.

    Thanks again.
     
  6. #12

    Expert

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    Looks good from here.
     
    tracecom likes this.
  7. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Is the pot linear taper, or audio taper? If linear, then it is ok to swap ends...
     
  8. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    It is audio taper and is connected as shown in post 5. I have now breadboarded the circuit and the volume goes up as I turn the pot clockwise, which is what I want. So, apparently, everything is ok.
     
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