包含AVR单片机的AD,I2C，EEPROM,PWM,定时器，串口等功能进行分析并给出程序。-Include AVR MCU AD, I2C, EEPROM, PWM, timers, serial port, are discussed and give the program.

avr单片机定时器简介,对于初学者很有用.请朋友们下载.-Introduction of the AVR timer, useful for beginners. Please friends download.

avr单片机定时器实现对时间 日期的累积，可以通过按键修改时间 日期，数码管显示(AVR single chip timer realizes the accumulation of time and date, can modify time and date by key, digital tube display)