Intelligent theft-proof door bell
An anti-theft doorbell and intelligent technology, applied to instruments, alarms, etc., can solve problems such as difficult maintenance, simple structure and single function, complex wiring, etc.
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[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0014] Such as figure 1 , 2 , Shown in 3, the present invention preferably adopts PIC509 single-chip microcomputer, and other circuit parts all surround single-chip microcomputer. Utilizing the feature that the various states of each port of this type of single chip microcomputer and the relationship between them are controlled by programming, the electric signal generated by the piezoelectric effect when the piezoelectric ceramic BJ2 induces vibration (sound) is used to enter the triode through the reed switch S1 Q2 amplifies and finally enters the GP3 port of PIC509, which is used as a vibration signal input; the password input switch S2 is connected to the GP1 port of PIC509, and the GP1 port is the input port to enter the password; the displacement reed switch S1 is connected to the GP0 port of PIC509, and the GP0 port The input port is the displa...
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Abstract
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