Found this stumbled on a site this morning.. This actaully may be helpful. Hard to fins stuff like this on the interent, cause they either reference peizo as a salt or for display only.
This drive a piezzo.. He stuggle d with this too,/...
How to drive a Piezo with an Arduino - Instructables
http://www.instructables.com/...make-an-Arduino-driven-Piezo-LOUD Cached
Intro: How to make an Arduino driven Piezo LOUD. Hey all! I struggled with making a loud piezo buzzer from 5volts. I figured it out. It is super simple and as loud as ...
How to drive a Piezo with an Arduino
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