Real Time Clock Module based on DS3231 RTC Chip with additional 32kB EEPROM and I2C Interface; socket for rechargeable LR2032 Battery; Library included in Arduino IDE. Please don't use a non-rechargeable CR2032 without disconnecting the Charging Circuit (see picture Gallery) RTC Chip DS3231; EEPROM 24C32N; I2C Interface; socket for rechargeable 2032 Button Cell; Library included in Arduino IDE Dimensions: Size 22 x 39 x 14 mm; Weight 5 g Content: 1x RTC Module DS3231 assembled and tested This Real Time Clock Module comes with a DS3231 RTC chip (compatible with Maxim/Dallas DS3231SN), battery backup and a 32kB I2C EEPROM.
The module has a socket for a rechargeable lithium cell LR2032 and a simple charging circuit.
Since the current drawn from the battery is very tiny, and a standard CR2032 cell will last way over 5 years, it does not make much sense to invest in one of the very expensive, rechargeable cells. If you want to use a standard CR2032 lithium cell, you only need to interrupt the charging circuit by removing one component. Please see the picture gallery for details.
- 2-wire connection SDA/SCL
- Operating voltage 3.3V – 5.5V DC
- Multiple libraries (from different authors) are available
Download Maxim DS3231 datasheet
Download 24C32N datasheet