Intelligent antitheft alarm device adopting key
A technology of anti-theft alarms and alarms, applied in the field of alarms, can solve problems such as personal information and property loss, and achieve the effect of improving operability and not being easy to decrypt
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[0027] The technical solution of the present invention will be described below in conjunction with the accompanying drawings, and the 125K frequency is used as the antenna coupling frequency for illustration, and the principles of other frequencies are the same.
[0028] Such as figure 1 , 2 As shown, a circuit board and a buzzer are installed in the shell cavity composed of the upper shell and the lower shell to form an alarm, and 6 wires are drawn out from the lower side of the shell, including 48V power line, ground wire, electric door lock wire, The motor rotation detection line, the 125K antenna coil, and the electronic components on the circuit board are connected as follows:
[0029] Power module: The 48V power line is connected to the anode of diode D6, and the cathode of D6 forms a node, and there are 2 branches, 1 branch is connected to the network label V+, 2 branches are connected to one end of resistor R36, and the other end of R36 forms a node, and there ...
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