Most RTC clocks use an external quartz resonator of 32 kHz. This is a good solution, however, these resonators are not undergoing the changes of the temperature (temperature in a small degree, but affects the movement of the crystals). Module of the DS3231 Precision RTC FeatherWing real time clock, has a quartz resonator integrated in a chip. Next to it, is the temperature sensor, which adds or subtracts the time quantums.
Connector on battery CR1220, so-called small pill (not included), enables the maintaining of the RTC in the absence of the main power.
- System: DS3231
- Communication: I2C bus
- Included are connectors for self-soldering
- Dimensions: 50.8 mm x 22.9 cm x 1.6 mm
- Weight: 4.8 g