"基于单片机的热释电防盗报警系统设计及实现-陕西理工学院毕业设计"
Based on the document "Thesis on PIR Anti-Theft Alarm System Based on Single-Chip Microcomputer (2021-2022 Collection)", this paper provides a comprehensive and free resource for designing a PIR anti-theft alarm system using a single-chip microcomputer. The document includes detailed information on hardware and software design aspects of the system. It covers the selection of the core chip, peripheral circuit connections, interconnections between chips, programming methods, and corresponding software. The system is powered by 7805, 7809 chips which output 5V and 9V voltage, respectively, and the power supply to the system is delivered through a voltage regulator module. The entire design follows a modular approach, with the main controller using AT89C51 to monitor analog signals from PIR sensors and vibration displacement sensors in a residential setting. When any abnormal activity is detected, the sensors generate digital signals that are input to the microcontroller, triggering an alarm through a buzzer for immediate response. For system reliability, a low-power, four-pin IMP812 monitoring chip is used in the reset circuit. The hardware circuit of the system is simple, easy to install, easy to operate, and cost-effective, making it suitable for various types of residential properties and inhabitants. Overall, this PIR anti-theft alarm system based on a single-chip microcomputer is an efficient and accessible solution for enhancing home security. Keywords: Sensor; Single-chip microcomputer; Alarm system; Shaanxi University of Technology.
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