说明：  非常经典的51单片机常用实例程序代码，还附有开发板原理图：内容主要有：1 流水灯2 倒计时--数码管3 数码管动态显示4 数码管静态显示5 点阵--心型6 串口通信16 串口通信27 继电器控制8 音乐播放程序9 AT24C0210 红外线接收11 DS18B20 12DS1302 13 LCD1602-1 14 PS2键盘显示；15 矩阵键盘16 LCD12864 17 步进电机17 步进电机驱动 18 ADC0832 19 RS485通讯 20 直流电机 21 定时器0 22 按键计数器 23 交通信号灯控制 24 中断 25 串口接收发送程序
(SCM is commonly used in the classic examples of program code 51, also with a development board schematics: mainly: 1 water light 2 Countdown- 3 digital control digital control digital control of static dynamic display 4 5 dot matrix display- heart-shaped six serial serial communication 27 communications relay control 16 music player 8 9 AT24C0210 infrared receiver 11 DS18B20 12DS1302 13 LCD1602-1 14 PS2 keyboard and display 15 matrix keyboard 16 LCD12864 17 17 stepper motor driver stepper motor 18 ADC0832 19 RS485 Communication 20 DC 21 key counter timer 0 22 24 23 traffic signal control 25 serial port interrupt to send programs to receive)