Anti-theft alarm for valuable home appliances

Relevant key device information applied in this article: CW9300 FD400 JD400 LM386 9013 This home appliance anti-theft alarm is different from ordinary anti-theft alarms. It is installed in the casing of the home appliance. On the one hand, the machine is equipped with a dedicated battery pack as a working power supply, and at the same time, it uses the low-voltage DC power supply inside the machine as a backup power supply. When a home appliance is stolen, the working power supply in the alarm is turned on, and the alarm starts to work, sending out an alarm signal and transmitting it to the receiving host (owner). Since the alarm transmitter can self-lock after being powered on, the circuit has been in working condition since then and can continuously send alarm signals, which provides the owner with a reliable tracking signal. As shown in the figure, (a) is the alarm transmitting circuit; (b) is the receiving circuit.