The automobile burglarproof alarm (3)

Published:2011/7/23 3:30:00 Author:qqtang | Keyword: burglarproof alarm | From:SeekIC

The working principle of the circuit The burglarproof alarm circuit consists of the time-based integrated circuit IC, high power switch tube V, switch S2, time delay capacitor C and resistors R1-R4, see as figure 7-81. Sl(Sla and Slb) is the igniting switch (car lock switch), GB is the storage battery of the car, R4 is the additional current limit resistor of the igniting coil.When the car starts normally, the switch S2 is at the point of b, the burglarproof circuit is not working.



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