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piezo

Piezo elements and their Resonant Frequency

Ok, I was looking forward to stock up on piezos. Not particular plan in mind at the moment, but I just want to have them around when I need them. (shipping times are bothersome) So, I was looking for me most versatile ones.

Then, I've realized that I know next to nothing about piezos, but when looking around on ebay, what it seemed to vary was the size of them alonside with the resonant frequency.

So looking for resonant frequency of the piezos I've found:

http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=400600.60

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hello LMR, can i ask a little question? what is the simplest circuit of a piezoelectric to produce a buzzing sounds?

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let my robot be heard

Hi can anyone help on this....

I am trying to make some noises for my robot (in progress) via a picaxe 28x2 sound commands. I first bought a small piezo but it was way to quiet so i bought a bigger one, about 60mm D which i thought the sound would have been louder but it isn’t.