SparkFun Real Time Clock Module DS1307 V1.4

This a custom designed module for the DS1307 Real Time Clock.

The module comes fully assembled and pre-programmed. The included Lithium coin cell battery (CR1225 41mAh) will run the module for a minimum of 9 years (17 years typical) without external 5V power. The DS1307 is accessed via the I2C protocol. We've written a test-bed to program the modules. This test-bed code should give you some insight on how to interface the module to any microcontroller using our example software I2C and BCD routines.

This rev of the Real Time Clock module finally adds I²C resistors and a larger battery pad to fix the problems with the battery shorting to the board.

Features:

• Two wire I2C interface
• Hour : Minutes : Seconds AM/PM
• Day Month, Date - Year
• Leap year compensation
• Accurate calendar up to year 2100
• Battery backup included
• 1Hz output pin
• 56 Bytes of Non-volatile memory available to user

Dimensions: 0.75x0.75" (20x20mm)

Links:

• Wiring Example
• Arduino Tutorial. Thanks John Vaughters!
• Arduino Tutorial in Portuguese. Thanks Daniel Gonçalves!
• Bildr Tutorial