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The motorcycle anti-theft alarm (6)

2016-09-02 07:48  
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The motorcycle anti-theft alarm (6)
The principle of the circuit The motorcycle anti-theft alarm circuit is composed of the anti-theft detection control circuit, the switch control circuit and the sound alarm circuit, the circuit is as shown in figure 7-89. The anti-theft detection control circuit is composed of the sensor (it is composed of the plastic bottle, saline and three electrodes), the diodes VDl and VD2, the resistors Rl and R2, and the D1 of the AND gate IC (Dl-D4). The sound alarm circuit is composed of the transistors Vl-V3, the D2, the resistors R3, R5, R6, R8, R9, the diodes VD3, VD4, the capacitor Cl and the alarm HA. The switch control circuit is composed of the diode VD5, the resistor R4, the transistor V4 and the capacitor C2.