DCF77

jjch17

New Member
Hello everyone,

I am looking for a management program
DCF77 receiver module with a
PICAXE 08M and 18M2.

Thank you for your help.
 

BeanieBots

Moderator
Plenty of examples on the web, shouldn't be too hard to convert.
MSF has been covered here, worth a search.
Also worth posting a link to whatever DCF77 module you have so that even if nobody here has done it already, they can contribute without having to first find out what it even is.
 

hippy

Ex-Staff (retired)
@ jjch17 - It's best to keep to one thread on a particular topic, and to post in the Active Forum - I've merged and moved the threads.

It's most likely not a problem with posting in the Active Forum and le forum officiel PICAXE francophone as both mainly attract different members.
 

westaust55

Moderator
Tim Giff apparently figured out the DCF77 encoding/receiving
http://www.picaxeforum.co.uk/showthread.php?t=6707
I've worked out most of the code including how to decipher the DCF77 signal! ands set the clocks
but the member has not been on this forum for at least a year now.


Some sites where folks have a working DCF77 but little real information include:
http://www.hamradionation.com/browse_vidfeeders.php?&tag=Microcontroller&p=2
http://www.electro-tech-online.com/electronic-projects-design-ideas-reviews/93022-synching-quartz-master-clock-dcf77-msf.html

discussing DCF77 and PICAXE:
http://draaggolf.blogspot.com/2009_06_01_archive.html
http://www.allquests.com/question/388890-1/7-segment-LED-Clock.html


DCF77 with 18 pin PIC
http://arvin.schnell-web.net/dcf77/

and has circuit diagrams, board layout, etc
http://arvin.schnell-web.net/dcf77/dcf77.pdf

Unfortunately no code available so you may have to be a pioneer
 

eclectic

Moderator
@jjch1
Where are you, in France?
From
http://www.npl.co.uk/science-technology/time-frequency/time/products-and-services/msf-radio-time-signal


“ The antenna at Anthorn is at latitude 54° 55' N, and longitude 3° 15' W.
The radiated power is typically around 17 kW and the horizontal radiation pattern is
substantially omnidirectional.
The signal provides a field strength exceeding 100 µV/m at a distance of 1000 km from Anthorn,
which covers the whole of the UK, and
it can be satisfactorily received throughout much of northern and western Europe. “


There are posts on the Forum
which show a Picaxe interfacing with an MSF receiver.

e
 

hippy

Ex-Staff (retired)
http://www.compuphase.com/mp3/h0420_timecode.htm

About halfway down is a description of the DCF77 protocol. It seems very similar to MSF in the UK and so should be similar to bit-bang and the overall protocol looks to be simpler.

Looking at the past MSF posts eclectic mentions is probably the best place to start, particularly in detecting length of pulses, detecting the minute marker, then building up from there.

Things will probably be easier and more understandable if you have a digital storage scope or a slow enough logic anaylser so you can see the transmissions over a minute or two but it should be possible to get it working without.
 
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