DS1307 features and specs Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, and Year with Leap-Year. Compensation Valid Up to 2100 56-Byte, ...

What more could you possibly want from an RTC Module?” Specifications for the Kraztech Real Time Clock Module include : – I2C Interface – Hours, Minutes, Seconds, Day of Week, Day, Month, Year ...

He’s made a real-time-clock module controlled by a rubidium frequency standard, and since it also includes a GPS clock he can track local time dilation effects by comparing the two.