The Adafruit DS3231 Precision RTC Real Time Clock Breakout boards are cleverly designed to compensate for thermal drift making them some of the most accurate RTCs available in a small package. The timing crystal is inside the chip and there's a temperature sensor right next to it so that clock ticks can be added and removed to maintain accuracy. A simple CR1220 coin cell can keep the clock ticking for years; the battery isn't supplied, but we have plenty to choose from.
Adafruit provide a detailed tutorial to get you started covering the pinout, soldering the header strip and using a library to talk to the clock.
Supplied as a fully assembled board plus a strip of 0.1in. header for you to solder on as required.
- One of the most accurate RTCs in a small package
- Communicates using I2C, only 2 x GPIOs
- Dimensions 23 x 17.6 x 7.2mm (0.9 x 0.7 x 0.28in.)
- Adafruit part no.: 3013
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