Adafruit 3013 DS3231 Precision RTC Real Time Clock Breakout

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

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.