Volume control 555-speaker circuit?

Discussion in 'The Projects Forum' started by TsAmE, Sep 11, 2010.

  1. TsAmE

    Thread Starter Member

    Apr 19, 2010
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    I was wondering how one could make a simple volume control for a 555-speaker circuit, by like using a potentiometer?
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    What your doing will work, but I think this is a better approach...

    [​IMG]

    For one thing the volume will actually go to zero.
     
  3. TsAmE

    Thread Starter Member

    Apr 19, 2010
    72
    0
    Thanks a lot! I am curious, what does the capacitor do in this circuit?
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,535
    Decouples the DC from the speaker. You don't really want steady (possibly high) current going through the speaker, all you're after is the AC component. Think 220µF or more.
     
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