Curious about low-voltage piezoelectric film drivers

Mar 15, 2006 5 Replies

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benjamin.eckel 20 years ago

I am trying to build a low voltage (0 - 9 volts) system to drive piezoelectric film to produce a 5kz sound wave to test it's ability to annoy female mosquitoes. Supposedly, male mosquitoes produce this sound. I know a fair deal about electronics but not much about piezoelectric film or Integrated Circuits. Does it take film with a special resonant frequency to produce the specified sound or can some source of PWM be used to adjust the frequency? Any information is useful especially a diagram of a circuit I can build.

thanks all,

Ben

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Rich Grise 20 years ago

Well, notwithstanding those things have never worked, who told you you need a "piezoelectric film"? What _is_ a "piezoelectric film"? You can put out 5 KHz with a 39-cent PC speaker and a

555 oscillator and a few Rs and Cs.

But it won't repel mosquitos.

Have Fun! Rich

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Fred Bartoli 20 years ago

But it is not a "piezoelectric film"

Thanks, Fred. :-)

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Dirk Bruere 20 years ago

Piezoelectric transducer is what he's looking for. Good up to a lot more than 5kHz. Maybe drive it with a square wave to get lots of higher frequency harmonics.

Dirk

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Rich Grise 20 years ago

Like these?

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Cheers! Rich

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Joseph2k 20 years ago

Various forms of PVF2 and some other plastics are piezoelectric films. PVF2 is pyroelectric as well. You know where to go for more.

JosephKK Gegen dummheit kampfen die Gotter Selbst, vergebens. --Schiller

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