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Radio controlled sports watch

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panrider_uk
World Chat Champion



Joined: 23 Sep 2007
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PostPosted: 12:45 - 19 Aug 2008    Post subject: Radio controlled sports watch Reply with quote
I.e. one that gets its time from radio signals.

I'm after a new watch for swimming and have seen a few of these for sale at Argos
E.g.

My concern is that the radio receiver would reduce the battery life.

Does any one own such a watch and if so, what's the battery life like?

Thanks

Mark
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shworth
Borekit Bruiser



Joined: 22 Jan 2006
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PostPosted: 17:53 - 19 Aug 2008    Post subject: Reply with quote
I think they only update either once a day or once a week.

I had an alarm clock which updated every night at midnight, that was mains powered though so i'm not much help!
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yandy_yay
Brolly Dolly



Joined: 01 Aug 2008
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PostPosted: 17:58 - 19 Aug 2008    Post subject: Reply with quote
i have casio wave ceptor, updates 3 times at night (12.00 1.00 2.00) battery lasts about 2 yeas.

HTH
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Didge
Traffic Copper



Joined: 02 Jul 2006
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PostPosted: 18:33 - 19 Aug 2008    Post subject: Reply with quote
Receiving a signal, takes very little from a battery.
I've got one of these:-

https://i33.tinypic.com/sdfdwm.jpg

Solar powered & atomic clock radio setting. It's a very tough watch, and I'm very pleased with it after 2 1/2 years of owning it.

It even puts up with the vibrations from my Buell. Very Happy
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panrider_uk
World Chat Champion



Joined: 23 Sep 2007
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PostPosted: 19:11 - 19 Aug 2008    Post subject: Reply with quote
I bought a casio wave ceptor Smile

It tries up to 6 updates a day but cancels the other 5 as soon as 1 succeeds so good for the battery.

Thanks

Mark
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 08:22 - 20 Aug 2008    Post subject: Reply with quote
panrider_uk wrote:
I bought a casio wave ceptor Smile

It tries up to 6 updates a day but cancels the other 5 as soon as 1 succeeds so good for the battery.

Thanks

Mark


I thought the Greenwich signal was sent at 8am every morning and did not require any 'poll' message. It just gets sent.

Its every British man's right to have a radio signal to tell him the time, and don't let anyone tell you otherwise! Laughing
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carvell
Scuttler



Joined: 05 Sep 2003
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PostPosted: 08:57 - 20 Aug 2008    Post subject: Reply with quote
MarJay wrote:
I thought the Greenwich signal was sent at 8am every morning and did not require any 'poll' message. It just gets sent.

Nay. One of my university projects revolved around this signal.

The signal is sent on 60kHZ (so the watch needs a 60kHz receiver) and is transmitted from Anthorn. You're right in that it doesn't need a 'poll' message, but the signal's sent every second of every day, 24/7. It takes 60 seconds to send the time and date for the next minute.

More info:

https://www.npl.co.uk/server.php?show=ConWebDoc.998
https://www.npl.co.uk/upload/pdf/MSF_Time_Date_Code.pdf
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map
Mr Calendar



Joined: 14 Jun 2004
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PostPosted: 09:47 - 20 Aug 2008    Post subject: Re: Radio controlled sports watch Reply with quote
panrider_uk wrote:
...I'm after a new watch for swimming...
E.g....

Then you don't want one of those
Quote:
Water resistant to 50 metres.
means it can just about be worn in the shower.

See here.
You want one at least 100m, ideally 200m.
The hassle with these is when the battery needs replacement you need to take it to a place that can do the right pressure tests. At the moment this costs around £30 to £40.

The Casio G-Shock (example see here) is one to look at, or there's Casio's Wave Ceptor range Doh!, that you already have.

Hope this helps someone else though Thumbs Up
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