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Rev

jwpat7, Thanks so much for your advice. I was able to confirm that the piezo element was working by using the Knock sketch that is included in the Arduino IDE. I finally received a new LM358 dual-op amp (from the slow boat from China). Using the new LM358 chip solved the problem. My piezo amplifier is working!

GBG
– GBG

2016-11-30 16:59:13 +00:00
Commented Nov 30, 2016 at 16:59

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