This small board contains a DS1307 real-time clock IC with a backup battery. It's one of the easiest to use RTCs out there, with Arduino and other libraries or simply use I2C commands to set and retreive the time and date. Includes a lithium coin cell battery which should be good for four yeasrs at least. It's very easy to use, and with our Arduino tutorial you'll be up and running in no time.
Along with the DS1307 real time clock, the module also has an Atmel 24C32 EEPROM chip which is handy for storing data without worrying about power loss. There is also space on the board to solder your own DS18B20 temperature sensor.
Doesn't include header pins, however we have a range of them to choose from.
Working voltage: 5v
Two wire I2C interface
Hour : Minutes : Seconds AM/PM
Day Month, Date - Year
Leap year compensation
Accurate calendar up to year 2100
Consumes Less than 500nA in Battery-Backup
1Hz output pin
56 Bytes of Non-volatile memory available to user
provides 32,768 bits(4KB) of serial electrically erasable and programmable
read only memory (EEPROM)
Embed DS18B20 temperature sensor interface with the pull-up resistor