Multi-touch piezoelectric alarm circuit
An alarm circuit, multi-touch technology, applied in the direction of alarms, instruments, etc., to achieve the effect of high sensitivity, no need to replace batteries, and strong reliability
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[0021] The present invention will be further described in detail below in combination with specific embodiments.
[0022] Such as figure 1 As shown, a multi-touch piezoelectric alarm circuit includes an energy storage circuit and an alarm circuit, and the energy storage circuit is composed of a light emitting diode (2), a switch S1 (1), a piezoelectric sensor (3), a full bridge Composed of a rectifier circuit (4), a capacitor C1 (6), and a rechargeable battery pack (7); the full-bridge rectifier circuit (4) is composed of four diodes (5); the alarm circuit is composed of a switch S2 (8), Sliding resistor (9), 555 timer chip (10), resistor R1 (11), resistor R2 (12), resistor R3 (16), resistor R4 (25), resistor R5 (26), HS9561 chip (13) , buzzer (14), triode (15), capacitor C2 (17), capacitor C3 (19), capacitor C4 (21), capacitor C5 (24), two-color light-emitting diode (18), ground wire (20), A vibration sensor (22) and an electrode sheet (23) are formed.
[0023] Close the s...
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