Intelligent laptop anti-theft alarm circuit
A technology for laptops and anti-theft alarms, applied in anti-theft alarms, alarms, instruments, etc., can solve the problems of expensive laptops and headaches when data cannot be retrieved.
Inactive Publication Date: 2015-04-29
XIAN ZAOXIN ELECTRONICS INFORMATION TECH
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Problems solved by technology
[0002] At present, many laptops are stolen, and the stolen people are very troubled. Not to mention the valuable value of the laptop itself, it is even more troublesome if the information inside cannot be retrieved
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[0013] When the device is in the working state, the green light D1 is on, and the pyroelectric infrared sensor is in the working state. When the pyroelectric infrared sensor does not detect the infrared signal of the human body, pin 2 of BISS0001 outputs a low level, the triode is in the cut-off state, and the single-chip microcomputer P1 .0 port is high level, the sound and light alarm device does not start. When someone approaches the laptop, the pyroelectric sensor detects the infrared signal of the human body and sends it to BISS0001 for processing. After being processed by BISS0001, pin 2 of BISS0001 outputs a high level, and the triode is saturated and turned on. The P1.0 port of the microcontroller is Low level, start the sound and light alarm device at this time, the red light D2 flickers, and the alarm sounds to remind the owner to pay attention to anti-theft.
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The invention relates to an intelligent laptop anti-theft alarm circuit which is composed of a pyroelectric sensor and signal thereof processing circuit, a sound and light alarm circuit and a single chip microcomputer master control circuit. In the pyroelectric sensor and signal thereof processing circuit, a pyroelectric infrared sensor and a sensor signal processing integrated chip are taken as a center, and a human body infrared signal detection and signal processing circuit is formed. The single chip microcomputer master control circuit comprises a single chip microcomputer clock circuit and a single chip microcomputer reset circuit. The circuit is ingenious and compact in design and has an anti-theft alarm effect.
Description
technical field [0001] The invention relates to an anti-theft alarm circuit for a notebook computer. Background technique [0002] At present, many notebook computers are stolen, and the stolen people are very troubled. Not to mention the high value of the notebook computer itself, it is even more troublesome that the information inside cannot be retrieved. So the safety of notebook computer is more and more important, and people long for a kind of notebook computer that can call the police, as long as the thief approaches notebook computer, notebook computer reports to the police at once. Contents of the invention [0003] The object of the present invention is to provide a circuit design for a notebook computer anti-theft device. [0004] Technical scheme of the present invention is: [0005] The circuit is mainly composed of three parts: the main control circuit of the single-chip microcomputer; the pyroelectric sensor and its signal processing circuit; the sound and ...
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IPC IPC(8): G08B13/191
CPCG08B13/191
Inventor 不公告发明人
Owner XIAN ZAOXIN ELECTRONICS INFORMATION TECH