This is an RTC DS1307 module that comes with a CR2032 battery holder. The RTCs are widely used where timekeeping is necessary. It can be used to show the current time i.e. real-time. Also, this module can be used to make an alarm clock also. It uses a single CR2032 battery which can run the RTC for years. The DS1307 chip can be interfaced with the i2c protocol with different boards.
SPECIFICATIONS
- DS1307 I2C real-time clock chip (RTC)
- Supply voltage 4.5-5.2V
- Battery voltage 2.0-3.5V
- AT24C32 32K I2C EEPROM memory
- 56 Bytes of Non-volatile memory available to user.
- Size: 27 x 28 x 8.4mm
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