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本论文设计了由AT89C52单片机为控制核心,用红外线为监测装置的防盗报警系统。该系统中红外对管作为红外线的发射和接收部分。发射部分采用红外发光二极管，而使用光敏三极管作为接收部分，接收红外发光二极管发出的红外线（不可见光）。单片机将通过内部的软件系统检测到接收管的导通或截止状态,并根据检测到的信号状态,进行判断并输出报警信号, 直至按复位按钮或电源开关。声光报警信号由9014三极管驱动构成声光报警电路,进行声光同时报警。电源部分采用变压器将220V交流市经变压器降压，桥式整流器整流，电解电容滤波，三端稳压管78L05稳压，最后得到整机要求的+5V稳定直流电源。实验表明，本系统成功运行。(This thesis is designed by AT89C52 microcontroller as the control center for monitoring device with infrared burglar alarm system. The system of infrared tube as infrared transmitting and receiving section. Emitting portion using infrared light emitting diode, a phototransistor as a receiving portion to receive the infrared ray emitted from the infrared light emitting diodes (not visible). The microcontroller will be detected by the internal software system to the turned on or off state of the receiver tube, and according to the detected signal state, to determine and output an alarm signal until a reset button or the power switch. Audible and visual alarm signal by 9014 transistor drive constitute sound and light alarm circuit, sound and light alarm at the same time. The power part of the transformer 220V AC City by the step-down transformer, bridge rectifier rectifier, electrolytic capacitor filter, three-terminal regulator 78L05 regulator, and finally get the machine requirements+5V)

说明：  stm32f103zet6 关于nrf24l01的发送程序(Stm32f103zet6 on nRF24L01 sending program)

虚拟串口，在Proteus中可用实际串口与其通信(Virtual serial port, available at Proteus its actual serial communication)

keil demo stm32 discovery keil demo stm32 discovery keil demo stm32 discovery keil demo stm32 discovery

应用51单片机写的蜂鸣器的祝福歌,里面有详细的代码(51 microcontroller blessing song written by buzzer)

说明：  基于STM32F103利用SPI协议，RC522多功能读取，修改，删除卡片(Based on STM32F103 and SPI protocol, RC522 can read, modify and delete cards with multiple functions.)

这是基于开发板LPC1114的源码程序，是用C语言编写，用于实现LED灯的点亮以及开关的控制，同时它也是一个完整的模板，可以在此基础上添加其他程序用于开发板的学习，是一个完整的模板，可直接使用。(This is based on the development board LPC1114 source code program, is written in C language, used to realize the lighting of LED lights and switch control, at the same time, it is also a complete template, you can add other programs on this basis for the development board learning, is a complete template, can be used directly.)

此为双声道超声流量计单片机程序，经过修改可测管网热量(this is two channels ultrasonic flowmeter program on stm32l152c8t6 microcontroller)

说明：  摘 要 本设计采用单片机（89S52芯片）为系统的控制核心。整个设计采用了模块化的设计思想，包括直流稳压电源模块、LED数码管显示模块、自动校零电路模块、采样电路模块、测量电路模块。( This system regards the request of the topic, adopting 80C51 for controlling core, )

飞思卡尔单片机锁相环程序，详细说明了锁相环的配置步骤以及计算方法(Freescale MCU PLL procedures, a detailed description of the PLL configuration steps and calculation methods)