Real Time Clock Module

Description

This is the SparkFun Real Time Clock (RTC) Module, this little breakout that uses the DS1307 to keep track of the current year, month, day as well as the current time. The module comes fully assembled and pre-programmed with the current time (MST) and includes a small CR1225 Lithium coin cell battery that will run the RTC for a minimum of 9 years (17 years typical) without an external 5V power supply. The DS1307 RTC is accessed via the I 2 C protocol. We’ve written a test-bed to program the modules, this code should give you some insight on how to interface the module to any microcontroller using our example software I 2 C and BCD routines. This rev of the Real Time Clock module finally adds I 2 C resistors and a larger battery pad to fix the problems with the battery shorting to the board. Features: Two wire I 2 C 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 0x68 I 2 C Address Dimensions: 0.75x0.75" (20x20mm) Documents: Schematic Eagle Files Datasheet (DS1307) Wiring Example Example 16F88 code Arduino Tutorial (Portuguese) Thanks Daniel Gonçalves! Bildr Tutorial GitHub (Design Files)