Air-Pressure Change Detector

Posted on Jul 16, 2012

A piezoelectric detector (BZ1) is used in this circuit to detect a change in air pressure. BZ1 produces a volt

Air-Pressure Change Detector
Click here to download the full size of the above Circuit.

age that is amplified by U1A and UXB. Frequency response is limited to low frequencies. The signal is rectified by D1 and D2 and drives Ql, which activates BZ2, a piezoelectric buzzer.

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