jetlib.sec » Hack a Day » Sunrise alarm clock uses DCF77 for perfect time

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Hack a Day

• December 06, 2012
• 

  Sunrise alarm clock uses DCF77 for perfect time

  Posted: December 6th, 2012, 3:01am PST by Mike Szczys

  Tags:  sunrise clock alarm renaud-schleck transparent-case schleck alarm-clock hacks  

  Here’s a sunrise alarm clock that keeps perfect time. It was designed and built by [Renaud Schleck] who also published a post detailing the process. As you can see, a series of white LEDs inside of the transparent case which provide the simulated sunrise. As the days get short and the nights longer we do [...]