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Curious about low-voltage piezoelectric film drivers

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
Reply to
benjamin.eckel
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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

Reply to
Rich Grise

But it is not a "piezoelectric film"

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Thanks,
Fred. :-)
Reply to
Fred Bartoli

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

Reply to
Dirk Bruere

Like these?

formatting link

Cheers! Rich

Reply to
Rich Grise

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

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JosephKK
Gegen dummheit kampfen die Gotter Selbst, vergebens.  
--Schiller
Reply to
Joseph2k

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