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Piezo buzzer/transducer

Discussion in 'Electronic Basics' started by Canyonero, Aug 22, 2007.

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  1. Canyonero

    Canyonero Guest

    Hi out there in Usenet electronics land.

    Was hoping to get a little help on something that should be pretty

    I want to vibrate a metal plate at different frequencies using a piezo
    buzzer or transducer of some type for some Cymatic experiments.

    I can use the output from a computer or stereo to generate lots of
    tones but how do I drive a piezo element with a speaker output ?

    This question is probably embarassingly easy to answer but I have
    never used a piezo element for anything other than creating a spark to
    light my cigarettes. :)

    Thank you in advance.
  2. Rich Grise

    Rich Grise Guest

    Good Luck!
  3. default

    default Guest

    Piezo transducers have very non-linear and limited frequency response.
    If you are working over a narrow range of high frequency it may make

    A voice coil drive makes more sense. Back in the old days there was
    an article in Popular Electronics about a "Sonic Shake Table."

    Small transistor oscillator driving a loudspeaker - you could put a
    fluid in the speaker cone and adjust the frequency to see standing
    waves in the fluid (fluid being things like mercury, and dry powders
    so as not to hurt the paper cone).
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