141–150 of 191 posts
Yes, as others have stated this is an old technology. I don't really understand why this is not more common in the modern day. it's not really that expensive to implement and they did it with analog chips back in the day... Why do we have to set the time on our clock radios or on our microwaves or whatever? Why don't they just always use this Tech. I don't understand. All you have to do is allow people to store an of…
I have Casio GW-M5600. It's a perfect watch. - Looks like classic G-Shock. - shows correct time always (time sync) - never runs out of battery (solar charging).
> I have Casio GW-M5600. It's a perfect watch. It's very large, though. I haven't found a radio-set 'square' Casio in the Baby G-Shock range which would be a better size.
I bought it maybe 10 years ago. I think it's "origin" series or something like that. They still sell them in ebay for ~$100.
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Have you...used them ? My Protrek basically doesn't sync if I'm at home, and as it tries to start sync after midnight the auto sync near-never works. I installed DCF77-emulator app on phone to get around it. My radio-synced clock works fine but comes with big (BIC lighter size but double the thickness) external antenna. Probably much worse in microwave that's somewhere inside the house and not near window > All you h…
Damn I had never thought of the possibility that you could easily battery back the clock in a microwave/oven/etc despite being fully aware that it's trivial to do. We get a ton of brownouts and I gave up on keeping the clocks set. I want it.
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Have solar atomic version. Don't wear it much these days. Mostly when I travel. Been on my dresser 2 years collecting dust but gets some sun. Picked it up the other day for a camping trip. It was both charged and had the correct date and time.
My battery has given up the ghost, and it's probably in a box of stuff around here. At the time, putting a new rechargable in it was impossible. I wonder if that's changed now... Edit: Neglected to mention mine was also solar
I bought it in part because of this feature and it was quite sad. These quartz watches are good but they still drift substantially after a few months.
Thankfully I heard of the DCF77 emulator app thanks to this thread and I will use it.
Yes, as others have stated this is an old technology. I don't really understand why this is not more common in the modern day. it's not really that expensive to implement and they did it with analog chips back in the day... Why do we have to set the time on our clock radios or on our microwaves or whatever? Why don't they just always use this Tech. I don't understand. All you have to do is allow people to store an of…
Is it really not common? I don't thing I have seen a digital clock or modern wall clock which doesn't have it. I think my Microwave has it too. Onky my oven doesn't. Is it maybe more common in Europe?
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GPS signals are much higher frequency and very low power and thus don’t work indoors. These HF time signals are way more powerful and can be detected inside buildings.
> GPS signals are much higher frequency and very low power and thus don’t work indoors. With a $20 antenna placed near the window, together with a modern receiver, it is easy to get nanosecond level of precision for GPS systems. Some receivers even have in-door precision specification. GPS not only work indoors, in terms of timing, it works actually pretty well indoors.
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Have you...used them ? My Protrek basically doesn't sync if I'm at home, and as it tries to start sync after midnight the auto sync near-never works. I installed DCF77-emulator app on phone to get around it. My radio-synced clock works fine but comes with big (BIC lighter size but double the thickness) external antenna. Probably much worse in microwave that's somewhere inside the house and not near window > All you h…
I have a number of DCF77 clocks in my home, including small alarm clocks. No external antennas. No issues whatsoever.
I had a ~$15 radio-synchronised clock when I was quite a long way from the transmitter, in a solid brick building. It would get a signal in some locations and orientations in the building.
I don't have firm information on how good the signal reception was, as of course it would keep ticking even if it didn't have a signal.
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In the interest of the previous reply, Casio's GBD-H1000 has the ability to time sync with GPS.
Yeah but it needs to be charged often. That would be a compelling use case for the radio based timing synchronization that are in less power hungry watches, and I'm curious, if this watch just had GPS for timing and none of the other features, if it's power would last as long or even half as long as the older models.