Comments on: Double triggering piezo sensors http://www.somesoundswelike.com/2008/01/08/double-triggering-piezo-sensors/ a california music blog Wed, 07 Jan 2009 20:47:16 +0000 http://wordpress.org/?v=2.6.5 By: olivar http://www.somesoundswelike.com/2008/01/08/double-triggering-piezo-sensors/#comment-2872 olivar Tue, 04 Mar 2008 22:56:39 +0000 http://www.somesoundswelike.com/2008/01/08/double-triggering-piezo-sensors/#comment-2872 I think you should try a 0.01microfarad cond. inserted after the piezzo and a 100k resistor to the ground after that. my two cents I think you should try a 0.01microfarad cond. inserted after the piezzo and a 100k resistor to the ground after that.

my two cents

]]> By: Tod E. Kurt http://www.somesoundswelike.com/2008/01/08/double-triggering-piezo-sensors/#comment-2647 Tod E. Kurt Fri, 11 Jan 2008 00:47:18 +0000 http://www.somesoundswelike.com/2008/01/08/double-triggering-piezo-sensors/#comment-2647 Hi Steve, Agreed, piezos 'ring' like crazy. They're designed to be buzzers after all. I've got another piezo signal conditioning circuit used on a project from a long time ago. I'll pull it up, do some tests, and post my results. I recall it being very good, creating a nice wide pulse with no ringing. I think it was basically a half-wave rectifier with small capacitor to temporarily store the charge. Then you measured the time it was over some threshold. Hi Steve,
Agreed, piezos ‘ring’ like crazy. They’re designed to be buzzers after all. I’ve got another piezo signal conditioning circuit used on a project from a long time ago. I’ll pull it up, do some tests, and post my results. I recall it being very good, creating a nice wide pulse with no ringing. I think it was basically a half-wave rectifier with small capacitor to temporarily store the charge. Then you measured the time it was over some threshold.

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