基于51单片机的热释红外程序，包含数据库操作的程序，STC51单片机可以支持串口直接烧录，下载非常方便-51 microcontroller-based pyroelectric infrared program, the program that contains the database operation, STC51 MCU can support serial burned directly, very convenient to download

52单片机设计程序，包括IO滤波等处理模块，相关单片机设计人员可以参考-52 single-chip design process, including the IO filtering and other processing modules, designers can refer to the relevant microcontroller

针对 89c52类型的单片机，提供了超声波测试程序，其中超声波原件为自己搭配，可以测试其是否可用。-For the type of 89C52 microcontroller, provides an ultrasonic testing procedures, including the original ultrasonic for their own match, you can test whether it is available.