Hi Shankar,

to generate a high precise 1 second clock in software, please look at:

http://www.specs.de/~danni/ap...mebase.htm

Then you can count seconds, minutes, hours etc.

The DCF77 receiver was only used, to synchronice this software RTC.
It need about 2 minutes after power on to receive a valid time information. Anytime, if a valid time information was detect,the values of the software RTC are updated with it.

I used a readymade DCF77 receiver from Conrad (www.conrad.com).
Look also at:

http://members.nbci.com/volkeroth/dcf77_e.htm


Peter