DCF77 Clock - A DCF77 Clock with RS232 Interface

Copyright (©) by Arvin Schnell


The clock is synchronised via the German time signal DCF77. It has a display with automatic brightness control and a RS232 computer interface.


DCF77 Clock

Design Overview:

The clock is built around a PIC16F84 microcontroller from Microchip. I chose this microcontroller since its FLASH memory is easy to program and assembler and programmer software is freely available for GNU/Linux. It has 13 general input/output pins which is just enough to implement all the feature I wanted.


Don't expect a detailed construction plan here. The real fun is designing and programming a clock like this. If you simply want a clock in your living room or keep your computer clock accurate you will find cheaper solutions in the next shop.



Last modified 15th March 2007 Copyright (©) 1998 - 2007 by Arvin Schnell

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