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Voltage controlled tone

Discussion in 'Beginner Electronics' started by js1180, Aug 25, 2004.

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  1. js1180

    js1180 Guest

    Does anyone have a simple circuit to control a tone using a 0-9 volt signal?
    I tried using a 555 timer circuit and small speaker. I can get a tone but I
    can't get the voltage signal to vary the tone. The circuits I found where
    complicated VCO/synthesizer circuits. Just looking for a simple low current
    (under 10 milliamp range) circuit. Thanks for any help.
  2. Troy Loftus

    Troy Loftus Guest

    Apply a control voltage on pin 5. This will vary your tone.
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