The RX-5412SF real-time clock module comes equipped with a time-stamp function for recording and storing times and dates of abnormal events such as system errors and warning signals.

An Atmega328 is used for the main microcontroller which communicates via I2C both to a DS1307 real time clock (RTC) and a TEA5767 FM module. ... Alarm clocks are a mainstay here at Hack-a-Day and ...