On Mon, Apr 14, 2008 at 11:59 AM, alan smith wrote: > I did a search thru the archives and found David Horn's comments VanHorn? :) > Presently the system voltage is 5V but could be migrating to 3.3V soon. So anyone have some good suggestions or references to what they have used in the past? Piezo elements in general, need high voltages to be loud. You can help by making the cavity resonant with the element, and driving it at the resonant point, but that's a twitchy solution. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist