本源代码是基于51单片机实验板，对于LED灯、蜂鸣器、LED数码管、键盘行列扫描的综合实验例程。包括跑马灯、蜂鸣器报警、蜂鸣器音乐、LED数码管数字跑马等。-Source code is based on 51 Microcontroller Experiment board, the LED lights, buzzer, LED digital tube, the keyboard scan the ranks of the comprehensive test routines. Including marquees, buzzer alarm, buzzer music, LED digital tube digital horse racing and so on.