measure coin used 89c52, which use two Timers

51系列单片机实验课程：串口 （通过计算机与试验箱相连，互相收发信息）-51 Series single-chip experimental curriculum: serial (through the computer and the chamber connected to each other to send and receive information)

一个利用51单片机实现对的简易功能的控制cd-rom的程序-A use of 51 single-chip microcomputer to realize the simple function of the control procedures for cd-rom

使用avr90can32双串口传输蓝牙数据-Avr90can32 dual-use Bluetooth serial data transmission

DS18B20温度测量，上下限温度设定测量（超出报警）-Upper and lower limits of temperature measurement (in excess of the police)

用AVR单片机实现对时钟芯片DS1302的spi驱动，来读取和写入时间-AVR Microcontroller with the right of the spi clock chip DS1302 drive to read and write times

无线传感器网络MAC协议研究中，PMAC协议的简单代码。-MAC Protocol for Wireless Sensor Networks study, PMAC code simple protocol.

本文介绍了AT89C2051单片机的性能和特点，并在分析了超声波测距原理的基本系统框图。该设计系统经校正后，其测量精度可达0.1米-This paper introduces the AT89C2051 performance and features, and the analysis of the ultrasonic distance measurement principle diagram of the basic system. The design of the system calibration, measurement accuracy of 0.1 meters

I2C串行总线元器件标准驱动程序的编写，可自己定义串行时钟线和串行数据线所在口-I2C serial bus driver standard components of the preparation, may own definition serial clock line and serial data line I

ZLG7290应用子程序，数码管显示与键盘管理芯片ZLG7290的标准80C51驱动程序C文件，此程序调试通过。-Subroutine ZLG7290 applications, digital tube display and keyboard management ZLG7290 standard 80C51 chip driver C files, this program through the debugger.

MSP430F149读写EEPROM2402-MSP430F149 read and write EEPROM2402