本电脑防近视预警系统使用STC89C51RC单片机，HC-SR04超声波测距模块以及ISD1760语音录放模块来实现。其功能是当物体离超声波测距模块距离少于30cm时，系统会自动播放录音提醒；单片机上的数码管实时显示物体到测距模块的距离。

源码中的qitadaima.c包含主程序以及测距模块的实现，yuyin.c包含语音模块的代码实现，smg.c实现四位数码管显示数字的功能。此代码可直接编译执行，适合beginners入门。-30cm distance　the ultrasonic ranging module objects, the system will automatically play the recording remind On the single chip microcomputer digital tube display real-time object to ranging module.

Qitadaima.c in the source code contains the main program and the realization of the distance measuring module, yuyin.c contains voice module code implementation, smg.c implementation of four digital tube display digital functions. This code can be directly compiled implementation, suitable for beginners.