Self-setting clock projects
Take a look at these cool project that use the German DCF77 system. According to Wikipedia, “DCF77 is a longwave time signal and standard-frequency radio station.” Which broadcasts date and time synced up from an atomic clock in Germany.
Take a look at this project found on Embeds.com, Binary DCF-77 Clock. The project picks up the signal and can display the time and date in a number of different ways using binary on an LED block. The project uses an Atmel ATmega8 microcontroller to decode the signal, modify the internal time and display the result.
Also, if you are interested, take a look at NTP DCF77 LED Clock which uses the same DCF77 receiver module, 60 LEDs, 6 big 7-segment digits and can act as an network NTP server!
Both projects released the schematics and firmware under the GPL so have at it!
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