The burglarproof alarm circuit

Published:2011/7/6 9:22:00 Author:qqtang | Keyword: burglarproof alarm | From:SeekIC

This circuit is used as the alarm of the vehicle and home, it is a dual time-based integrated circuit TDB0556, in which the first time-based circuit is a dual steady multiple oscillator, the circuit is getting into work after the switch S is pressed. Because of the voltage on the threshold input terminal 2, the output 5 is in a zero LEV. The second time-based circuit is in the output terminal locked state due to the zero state of 8-pin and 12-pin. The capacitor C1 is discharging. Once the door contactor or the briefcase contactor is closed, the alarm signal is emitted.



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