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Which contact to use on 3 contact piezos?

Posted by Servaas (Der Groovemeister) on February 24, 2011 at 5:11pm in Building Secrets, Tips, Advice, Discussion

I got some different sizes piezo discs to experiment with, but there's one size that has 2 zones on the ceramic plate on top. I found out that they are called 3 contact piezos. Where do i solder my hot lead? The big surface or the small bit?

 

Thanks in advance!

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Tags: 3, contact, lead, piezo
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Replies

  • David L. February 24, 2011 at 7:21pm

    Hi,

     

    It is a Self Oscillating piezo (used for sirens I think - if you google self oscillating piezo you can check out a datasheet if you want more info) it will work like a normal piezo pickup - wire one earth/ground wire to the metal base and two hots one to each of the two white bits on top.

     

    David

  • Dan Sleep February 24, 2011 at 6:41pm
    Beats me, I have only seen ones with 2 wires. Hook up some small alligator clips and test it out first.
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