NetTimeLogic’s RTC Master Clock is a full hardware (FPGA) only implementation of a synchronization core allowing to read and write a I2C Realtime Clock (RTC) like the DS1307 or MCP7941x. Access to the ...

The Equinox clock is made up of simple parts but a combination of fine design and precision make it a gem of a timepiece. The guts are made up of an Arduino, a DS1307 real time clock, twelve LED ...

Adafruit’s got a handy breakout board for the DS1307 RTC available ... or plug into an Arduino and has everything you need; clock crystal, a backup battery, filtering capacitor, and pull ...