PiezoPreamp
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Piezo preamp circuit diagrams
This is a clone of Alex Rice's Piezo preamp, from the drawings at http://www.zachpoff.com/diy-resources/alex-rice-piezo-preamplifier/
I've setup the .brd file for single sided SMD, with the aim of being as small as possible, hopefully to fit in a fizzy drink bottle lid like my hydrophones.
Prototype V1: 2/4/2012 http://www.flickr.com/photos/matthewvenn/7038507997/