The Chronodot 3.0 MAX31328 I2C Real Time Clock Module
Temperature-compensated real-time clock with battery backup
The Chronodot 3.0 by Macetech is a redesigned open source clock module that fits into the socket in the Bulbdial Clock kit. It's redesigned to use a MAX31328 RTC module (which replaced the Dallas DS3231S). Add a super-accurate clock to your next project that keeps time within 10 seconds per month! The RTC is also temperature compensating. Coin battery is included, and the unit is assembled.