Thanks Peter.  That did help a lot.  From this document I have concluded =
that I need to solder a negative wire on the lower edge on the same side =
as the red wire.  (Instead of on the other side in the middle which is =
what I tried.  It worked ok I guess.)

One more question on this please if I may.  I found that with the little =
encased piezo speaker I have that if I feed it a pulse with a 33% duty =
cycle I get a better sound than if I use 50%. =20

However I read somewhere that you should never use anything other than =
50% as anything else may damage the piezo.  I find anything about that =
in this excellent write up below.  Has anyone else heard this about the =
50%?



>=20
> A nice article about these kind of buzzers:
> http://www.thedigitalshop.net/techdocs/piezo.pdf
>=20
> Manufacturer links catalog with some driver examples and data
> for their
> piezo's though these have a second wire soldered on the brass
> plate:
> http://www.murata.com/catalog/p37e18.pdf
> http://www.east-mingtao.com/p01_20.htm
>=20
>=20
> Hope this helps
>=20
> Peter

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=20

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