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, and works best with 5V-based chips such as the Arduino.

Features:

• Brand new and high quality.
• This is the DS1307 Real Time Clock developed by one of our designer.
• The module comes fully assembled and pre-programmed.
• The DS1307 is accessed via the I2C protocol.
• Two wire I2C interface.
• Hour:Minutes : Seconds AM/PM.
• Day Month, Date – Year.
• DS1307 based RTC with LIR2032 battery (Battery include).
• 1Hz output pin.
• 56 Bytes of Non-volatile memory available to user.
• Item size: 28*26*8mm
• Net weight: 7g

Note: The DS1307 is simple and inexpensive but not a high precision device. It may lose or gain up to 2 seconds or more a day. For a high-precision, temperature compensated alternative.

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