RTC (Real Time Clock) DS1307 module

CreateLabz StoreSKU: 70-003


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This is a real-time clock (RTC) based on IC DS1307 that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Use for data-logging, clock, timers and alarms. The DS1307 can be easily connected to the Arduino, with an I2C bus interface. Module with real-time clock and backup battery power (battery included). It allows you to read the time in the form of hours, minutes and seconds, and dates: month, day, year. Communication with the module takes place over the I2C bus. There is also output with the SQW signal - it is an output of a rectangular signal with a selected frequency.


  • RTC system: DS1307
  • Supply voltage: 5V
  • Communication interface: I2C / TWI (SDA, SCL)
  • Refresh rate: 1 Hz (1 second)
  • Battery backup: YES - CR1220 (battery included)
  • An accurate calendar until 2100
  • Publicly accessible internal memory: 56 bytes


  • RTC 1307 clock module
  • CR1220 battery

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