FTDI PINS >>>>> ATMEGA328 PINS TX > RX (DIGITAL PIN 0 )(PD0) RX > TX (DIGITAL PIN 1 )(PD1) 5V > 5V GND > GND DTR > RESET PIN (0.1UF CAP IN SERIES ) RTC DS1307 PINS >>>>> ATMEGA328 PINS SDA > ANALOG 4 (SDA)(PC4) SCL > ANALOG 5 (SCL)(PC5) GND > GND 5V > 5V