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please help with audio-to-motor (light organ) circuit

Discussion in 'Electronic Basics' started by a price, Nov 2, 2003.

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  1. a price

    a price Guest

    I am trying to make a circuit work similar to those "dancing soda
    cans" or "talking lips radios" novelties. I have a circuit working
    which takes a speaker level signal (needed, rather than line level)
    and it drives a small 1.5v hobby motor. The circuit is a basic
    transistor amplifier using a pot as a voltage divider running to a
    2N2222 transistor (based on Forrest Mimms handbook). However, I have a
    bunch of hobby motors in ready-made "lip" contraptions which I would
    like to use and they seem to have higher voltage requirements. While
    the first hobby motor pulses on and off just fine, these other motors
    just buzz or vibrate to the audio. How can I amplify the signal
    further or otherwise drive the motors with sufficient power? My
    circuit is running off 3 AAA batteries which are sufficient to drive
    the "lip" motors directly.

    I can send a jpeg of the circuit I am currently using if anyone would
    like to see it. I would greatly appreciate any suggestions - thanks.

    P.S. I experimented with one of the velleman "simple light organ" kits
    which drives leds with a mic, but this does not even power the 1.5v
  2. Baphomet

    Baphomet Guest

    Please send the circuit to alt.binaries.schematics.electronics with the same
    subject. Offhand, a 2N2222 seems a bit light for this kind of application
    because it is just a small signal amplifier.
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