Thursday, 23 January 2014

Time

Some years ago I looked for a simple clock to have an accurate time available in my shack.
I found a nice design on this website:

http://www.picbasic.nl/  => Projecten => Digitale DCF77 klok

Circuit diagram DCF77 clock


I built the simple version (without sound) at the time and the clock is still working fine.
The clock uses a 16F628 PIC and a DCF77-module.
I selected a nice blue display to present the time.




                                                 DCF77 receive module

The longterm accuracy of the DCF clock is ok for normal use: After one year the deviation of the second is no more than +5 to +150 msec.

 
 Clock in operation

All about the 77.5 KHz  DCF77 transmitter in Mainflingen:
http://en.wikipedia.org/wiki/DCF77



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2 comments:

  1. PE4BAS, Bas23 January 2014 at 13:32

    Prachtig, en het kan nog kleiner. Heb zo een ontvanger/klok in m'n horloge zitten. Ding heeft zelfs een S-meter!
    Zie: The Ultimate HAMradio wristwatch
    73, Bas

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  2. PA2RF23 January 2014 at 23:06

    Ja dat is zeker leuk speelgoed Bas. Mooie wristwatch. Toch knap dat je langegolf signalen met zo'n kleine antenne in een horloge kunt ontvangen...

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