Micro vibration sensor alarming circuit diagram

Published:2011/6/23 21:51:00 Author:Nicole | Keyword: Micro vibration, sensor alarming | From:SeekIC

This circuit includes micro vibration sensor, trigger delay circuit and control circuit, the figure is as shown. The micro vibration sensor contains vibration sensor device and high power amplifier circuit, it can induce very weak external vibration signal, it has high sensitivity, and its output voltage signal can push the backward stage circuit directly. The monostable trigger cirucit consists of 555 and R1, R2, R3, C3, ordinarily, due to the partial pressure(1/2VDD)of R1, R2 voltage dividers, 555 is in reset state; when it is vibration, the vibrator's white line outputs low level signal(<1/3VDD), 555 is set, 3 foot turns to high level. The short steady time of the monostable circuit is td=1.1R3C3. The short steady duration time of graphic parameter is about 50s.



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