On 01/28/2014 01:54 PM, Ralf Mardorf wrote:
You can get open piezos here:
http://de.farnell.com/multicomp/abt-441-rc/transducer-piezo-4200hz-30v/dp/1…
http://de.farnell.com/multicomp/abt-448-90-rc/piezo-element-35mm-2-900hz-le…
If you cut them like in the video, be sure to have a bunch of them...
/ Hans
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Hans Wilmers
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