Real Time Clock Module

SKU: BOB-12708 Brand: Sparkfun

Retired Product

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This product has been retired. It is no longer available, but this page has been kept for reference.

Warning: This product requires a button battery to operate which is hazardous to young children. Do not use this product for projects that are potentially accessible to young children.

This is the 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 I²C 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 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)

Documents:

Schematic
Eagle Files
Datasheet (DS1307)
Wiring Example
Example 16F88 code
Arduino Tutorial (Portuguese) Thanks Daniel Gonçalves!
Bildr Tutorial
GitHub (Design Files)

This product is listed in:

Retired

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