The automobile burglarproof alarm (5)

Published:2011/7/23 3:47:00 Author:qqtang | Keyword: burglarproof alarm | From:SeekIC

The working principle of the circuitThe burglarproof alarm circuit consists of the sound control circuit, cutting off trigger/self-lock switch circuit, regulated circuit and alarm circuit, see as figure 7-83. The sound control circuit consists of the microphone BM, piezoelectric pottery BC, resistors R1-R5, potentiometers RP1-RP4, capacitors C1-C5, transistors V1-V3 and the FET VF. The cutting off trigger/self-lock switch circuit consists of the resistor RIO, short alarm line W, relay K and thyristor (VT1, TV2).



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