Adafruit DS1307 Real Time Clock Breakout Board

Key Features:

• DS1307 is the most popular RTC
• Great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost
• Works great with an Arduino using Adafruit' s RTC library or with a Raspberry Pi
• Perfect for datalogging, clock-building, time stamping, timers and alarms, etc.

This is a great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for datalogging, clock-building, time stamping, timers and alarms, etc. The DS1307 is the most popular RTC - but it requires 5V power to work (although we' ve used it with 5V power and 3.3V logic successfully)

The DS1307 is simple and inexpensive but not a high precision device. It may lose or gain up to 2 seconds a day.

Item Specifics
Length: 25.8 mm/ 1.02 in
Width: 21.7 mm/ 0.85 in
Height: 5mm/ 0.2 in
Weight: 2.3 g/ 0.09 oz
Mounting holes: 2.2 mm( 0.086 in) diameter, 25mm( 0.98 in) apart
This board/chip uses I2C 7-bit address 0x68