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where to get WWV_ / GPS / other clock sync. device?
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Scott Kelley
electronics forum beginner


Joined: 15 Jun 2005
Posts: 19

PostPosted: Thu Jun 29, 2006 6:43 pm    Post subject: where to get WWV_ / GPS / other clock sync. device? Reply with quote

I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.

Has anybody used something that you think I should take a look at?

Thanks,
Scott Kelley
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Sjouke Burry
electronics forum Guru Wannabe


Joined: 29 May 2005
Posts: 190

PostPosted: Thu Jun 29, 2006 10:57 pm    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

Scott Kelley wrote:
Quote:
I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.

Has anybody used something that you think I should take a look at?

Thanks,
Scott Kelley


A garmin integrated antenna/GPS (12V in,rs232 out,NMAE)n
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Gerard Bok
electronics forum addict


Joined: 04 May 2005
Posts: 88

PostPosted: Fri Jun 30, 2006 9:07 am    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

On Thu, 29 Jun 2006 11:43:27 -0700, "Scott Kelley"
<scottk@iccom.com> wrote:

Quote:
I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.

Has anybody used something that you think I should take a look at?

Depends on your geographical location.
In Western Europe there is DCF 77. Excelent for 'once a day' time
keeping. Such a service is probably also available in other parts
of the world.

If your device (also) has internet access, you could synchronize
to a pool of timeservers.

And there is GPS.

Take a look at http://www.galleon.eu.com/FAQ.htm

--
Kind regards,
Gerard Bok
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JANA
electronics forum Guru


Joined: 30 Apr 2005
Posts: 341

PostPosted: Sat Jul 01, 2006 8:20 am    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

If this is for a commercial application, get yourself a proper GPS that
comes with a PC interface that can carry the real time. There are dedicated
GPS receivers for time standards keeping. I believe Leitch Video, and Torpey
Time manufacture these. I have used both types in systems that I have worked
on. They work very well with excellent flexibility, compatibility, accuracy,
and stability.

http://www.torpeytime.com/

--

JANA
_____


"Scott Kelley" <scottk@iccom.com> wrote in message
news:gKydnY9qxLLjgjnZnZ2dnUVZ_s2dnZ2d@centurytel.net...

I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.

Has anybody used something that you think I should take a look at?

Thanks,
Scott Kelley
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John
electronics forum beginner


Joined: 07 Jun 2005
Posts: 14

PostPosted: Mon Jul 03, 2006 8:14 am    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

In message <gKydnY9qxLLjgjnZnZ2dnUVZ_s2dnZ2d@centurytel.net>, Scott
Kelley <scottk@iccom.com> writes
Quote:

I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.
as anybody used something that you think I should take a look at?

Do you have the skills to break into one of the clocks controlled by

various 'atomic' clock broadcasts? If so there seem to be several
available. I have one (battery operated) sold here in the UK by LIDL at
3.99!! This is controlled from Germany but I imagine there are similar
devices for WWV.
--
John
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Michael A. Terrell
electronics forum Guru


Joined: 24 Mar 2005
Posts: 2291

PostPosted: Sat Jul 08, 2006 9:56 pm    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

John wrote:
Quote:

In message <gKydnY9qxLLjgjnZnZ2dnUVZ_s2dnZ2d@centurytel.net>, Scott
Kelley <scottk@iccom.com> writes

I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.
as anybody used something that you think I should take a look at?

Do you have the skills to break into one of the clocks controlled by
various 'atomic' clock broadcasts? If so there seem to be several
available. I have one (battery operated) sold here in the UK by LIDL at
3.99!! This is controlled from Germany but I imagine there are similar
devices for WWV.
--
John


Actually, it would be WWVB, on 60 KHz. it is a simple one bit per
second modulation scheme where the carrier is reduced by 6 dB. The data
is available from NIST.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
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John Fields
electronics forum Guru


Joined: 24 Mar 2005
Posts: 3260

PostPosted: Sat Jul 08, 2006 10:51 pm    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

On Sat, 08 Jul 2006 21:56:08 GMT, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

Quote:
John wrote:

In message <gKydnY9qxLLjgjnZnZ2dnUVZ_s2dnZ2d@centurytel.net>, Scott
Kelley <scottk@iccom.com> writes

I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial application,
so I need something reliable - but of course cost is a driving factor as
well.
as anybody used something that you think I should take a look at?

Do you have the skills to break into one of the clocks controlled by
various 'atomic' clock broadcasts? If so there seem to be several
available. I have one (battery operated) sold here in the UK by LIDL at
3.99!! This is controlled from Germany but I imagine there are similar
devices for WWV.
--
John


Actually, it would be WWVB, on 60 KHz. it is a simple one bit per
second modulation scheme where the carrier is reduced by 6 dB. The data
is available from NIST.

---

-17dB.

http://tf.nist.gov/stations/wwvb.htm


--
John Fields
Professional Circuit Designer
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Glenn Gundlach
electronics forum Guru Wannabe


Joined: 30 Apr 2005
Posts: 222

PostPosted: Tue Jul 11, 2006 4:04 am    Post subject: Re: where to get WWV_ / GPS / other clock sync. device? Reply with quote

Scott Kelley wrote:
Quote:
I need to get a daily time update via a serial connection to a
microcontroller in my device. This is for use in a commercial
application,
so I need something reliable - but of course cost is a driving
factor as
well.

Has anybody used something that you think I should take a look at?

Thanks,
Scott Kelley

Check out these guys

http://www.ntp-time-server.com/wwvb-receiver/wwvb-receiver.htm

When I checked this out last year they were selling a kit with the
module and antenna for $60 -- just begging to be connected to a
microcontroller.

GG
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Google

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