WWVB - atomic clocks
Archiver
Posts: 46,084
Greetings,
I was wondering if any of you BStamp users who might know of a WWVB
receiver which will deliver RS-232 or TTL output suitable for reading
into the BStamp.
Ultralink, the makers of a WWVB receiver which has a few articles at
Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
Any suggestions?
Jah
I was wondering if any of you BStamp users who might know of a WWVB
receiver which will deliver RS-232 or TTL output suitable for reading
into the BStamp.
Ultralink, the makers of a WWVB receiver which has a few articles at
Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
Any suggestions?
Jah
Comments
I've used for two or three years. It's great! Do a search for Sync-Time
or Arcron-Zeit for other sources.
Regards,
-Nick T.
jim@j... wrote:
>
> Greetings,
>
> I was wondering if any of you BStamp users who might know of a WWVB
> receiver which will deliver RS-232 or TTL output suitable for reading
> into the BStamp.
>
> Ultralink, the makers of a WWVB receiver which has a few articles at
> Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
> ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
>
> Any suggestions?
>
> Jah
>
> Nick Taylor wrote:
> >
> > Jim ... Here is a link to one source for an RS-232 atomic clock which
> > I've used for two or three years. It's great! Do a search for Sync-Time
> > or Arcron-Zeit for other sources.
> >
> > Regards,
> > -Nick T.
> >
> > jim@j... wrote:
> > >
> > > Greetings,
> > >
> > > I was wondering if any of you BStamp users who might know of a WWVB
> > > receiver which will deliver RS-232 or TTL output suitable for reading
> > > into the BStamp.
> > >
> > > Ultralink, the makers of a WWVB receiver which has a few articles at
> > > Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
> > > ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
> > >
> > > Any suggestions?
> > >
> > > Jah
>
> Nick,
>
> Thanks for the info. I am actually using on of these Acron-Zeit devices
> right now. I just don't like the fact that it takes a funky DTR, RTS
> for power and mostly that it spits out data at 300 bits/sec. My BS2P
> applications don't do 300 bits/sec and I'm using a small PIC to do a
> conversion from 300 bits/sec to 4800 bits /sec. This is a bit ugly and
> requires RS-232 drivers. Not a very elegant BStamp solution.
>
> Are you doing it some way better? I would like to know.
My application used a different processor ... not the Stamp. A better
approach might be to use Tom Clark's "Totally Accurate Clock". Here's
a starter link: http://www.setileague.org/hardware/clock.htm
-Nick T.
http://nist.time.gov/timezone.cgi?Eastern/d/-5/java
Leroy
jim@j... wrote:
>
> Greetings,
>
> I was wondering if any of you BStamp users who might know of a WWVB
> receiver which will deliver RS-232 or TTL output suitable for reading
> into the BStamp.
>
> Ultralink, the makers of a WWVB receiver which has a few articles at
> Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
> ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
>
> Any suggestions?
>
> Jah
>
> To UNSUBSCRIBE, just send mail to:
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of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
> Jim ... Here is a link to one source for an RS-232 atomic clock which
> I've used for two or three years. It's great! Do a search for Sync-Time
> or Arcron-Zeit for other sources.
>
> Regards,
> -Nick T.
>
> jim@j... wrote:
> >
> > Greetings,
> >
> > I was wondering if any of you BStamp users who might know of a WWVB
> > receiver which will deliver RS-232 or TTL output suitable for reading
> > into the BStamp.
> >
> > Ultralink, the makers of a WWVB receiver which has a few articles at
> > Parallax regarding a WWVB receiver which uses RS-232, NO LONGER SELLS
> > ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
> >
> > Any suggestions?
> >
> > Jah
Nick,
Thanks for the info. I am actually using on of these Acron-Zeit devices
right now. I just don't like the fact that it takes a funky DTR, RTS
for power and mostly that it spits out data at 300 bits/sec. My BS2P
applications don't do 300 bits/sec and I'm using a small PIC to do a
conversion from 300 bits/sec to 4800 bits /sec. This is a bit ugly and
requires RS-232 drivers. Not a very elegant BStamp solution.
Are you doing it some way better? I would like to know.
Thanks,
Jah
--
Jim A. Horning
jim@j...
http://jimh.com
831-625-2780 (fax)
they could no longer get the reciever chip they were using and that they
were looking for another manufacturer for the chips. So they might start
making the WWVB again in the future.
On Sat, 24 Nov 2001 06:37:15 -0000 jim@j... writes:
> Greetings,
>
> I was wondering if any of you BStamp users who might know of a WWVB
> receiver which will deliver RS-232 or TTL output suitable for
> reading
> into the BStamp.
>
> Ultralink, the makers of a WWVB receiver which has a few articles at
>
> Parallax regarding a WWVB receiver which uses RS-232, NO LONGER
> SELLS
> ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
>
> Any suggestions?
>
> Jah
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
You could use a WWV receiver, tie in a tone decoder, phaselock loop
chip, tuned for 1,000 hz.
Feed the output to a pin on the stamp chip. Basically, once a
minute (except for the top of the hour), they fire off a 800
millisecond 1,000 hertz pulse that you could use to sync up to.
I'd probably use a Dallas RTC chip, set it's time and then use WWV to
keep it in time.
You could use another stamp or a cheaper stamp and then request time
info from it when you
want to as well.
The Canadian equivalent to WWV is CHU, they broadcast a regular
time info binary sequence
using tones for a 300 buad modem. If you get their RF signal OK, you
can use a modem or FSK chip to decode the 300 baud tones and sync up
a Dallas RTC chip, or use the time info directly as desired.
http://www.nrc.ca/inms/inmse.html takes you to the Canadian CHU
version of WWV. They basically send over the air, the same 300 baud
signal they send to you if you were to dial up their data line.
http://www.hobbytron.net/R-HFRC-1.html Hobbytron has a WWV receiver
kit, but you'll need
to use a PLL or something to convert the 1,000hz signal with.
http://psn.quake.net/sdrdocs/wwvcorr.htm#Intro has info about the
WWV signals that might help you out.
I hope this helps a little.
regards,
Earl
--- In basicstamps@y..., kelvin l schroeder <kls48@j...> wrote:
> I talked to the people a Ultralink about six months ago and they
said
> they could no longer get the reciever chip they were using and that
they
> were looking for another manufacturer for the chips. So they might
start
> making the WWVB again in the future.
>
> On Sat, 24 Nov 2001 06:37:15 -0000 jim@j... writes:
> > Greetings,
> >
> > I was wondering if any of you BStamp users who might know of a
WWVB
> > receiver which will deliver RS-232 or TTL output suitable for
> > reading
> > into the BStamp.
> >
> > Ultralink, the makers of a WWVB receiver which has a few articles
at
> >
> > Parallax regarding a WWVB receiver which uses RS-232, NO LONGER
> > SELLS
> > ANY WWVB PRODUCTS! Thus, I cannot obtain one of these.
> >
> > Any suggestions?
> >
> > Jah
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@y...
> > from the same email address that you subscribed. Text in the
> > Subject and Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
in Britian that will work for you. MSF operates on a frequency of 60
khz like WWVB and the receiver output can be decoded by a Stamp. The
output current limit is around 15uA for one version of the receiver
so run it thru a CMOS gate. The only outlet for the MSF EM2 receiver
that I know of is Maplin Electronics in the UK. Be sure and get the
ferrite core antenna that goes with it.
Bruce