In this project mcu atmega16 communicate with DS1307 IC on I2C communication protocol, in which MCU works as master and DS1307 as a slave.I2C communication takes place through SDA(serial data) and SCL(serial clock line). Atmega16 and DS1307 are connected through SCL SDA lines. Atmega16 writes the data In registers of DS1307 and then reads its reads it.The data read by MCU is displayed on the LCD.