Vibration alarm circuit diagram

Published:2011/5/6 1:17:00 Author:Jessie | Keyword: Vibration alarm | From:SeekIC

Using an integrated circuitIC7556, two piezoelectric ceramic clamps X1 and X2, and several passive electronic components to compose a mechanical vibration alarm, which can produce a minute of alarm sound. As long as exert mechanical vibration on piezoelectric ceramics piece X1, it will produce avoltage on IC1a's pin 610MΩ resistance. When triggered, 7556 makes piezoelectric ceramics piece X2 alarm sound. The second time basecircuit IC1b produces self-excited signal which is adjusted by 5Hz low-frequency.



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