The bicycle burglarproof alarm (2)

Published:2011/7/22 22:05:00 Author:qqtang | Keyword: burglarproof alarm | From:SeekIC

The working principle of the circuit The bicycle burglarproof alarm consists of the trigger control circuit, regulator filter circuit, music generator circuit and wireless emitting circuit, see as figure 7-110. The trigger control circuit consists of the trigger switch S, resistor R4 and thyristor VT. The regulator filter circuit consists of the 3-terminal voltage regulator integrated circuit IC2 and resistors of C7 and C8. The music generator circuit consists of the resistors R1 and R2, capacitor C1 and 3-terminal music integrated circuit IC1.



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