I'm always surprised how few people (especially newbies) ever go right
to the source for information on these things. A google search would
turn up many manufacturers of piezo buzzers. They virtually all have
applications notes and theory of operations on their web sites. The
internet (and Google or your favorite search engine) is your friend!

I would suggest visiting Murata Erie, AVX  and Kyocera web sites. THese
are all manufacturers I've used in the past and they have quite a lot
of technical data and application information available online.

Also, many distributors like Digikey have data sheet links for the
prodcucts they sell as well as links to the manufacturers web sites.
This makes finding information even easier and faster.

(trying to politely and non-offensively say find and RTFM... ;-)

Matt Pobursky
Maximum Performance Systems

On Wed, 16 Jun 2004 11:54:14 +0200, Lindy Mayfield wrote:
> It only has 1 lead!  (-:
>
> I've tried with a PWM wave.  If I plug the positive red lead to the output pin and touch a negative wire to the smooth, shiny backside, it buzzes nicely, I think.
>
> >
> > if it only has 2 leads, you probably connect one to positive and
> > one to
> > negative, obviously i'd try red positive first.  if it has 3
> > leads, you
> > need a feedback circuit to drive it (these aren't very common).
> > if it's
> > just a piezo transducer and not a buzzer, you'll just get a
> > click unless
> > you send it a more interesting waveform than just turning it on.

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