3 ms·
Alas, there are 3 rules of (ordinary) Lavet stepper clock movements: 1. You can't make it go the opposite direction. 2. You can't change the gearing ratio betw
by nsayer 5y ago
Alas, there are 3 rules of (ordinary) Lavet stepper clock movements:
1. You can't make it go the opposite direction.
2. You can't change the gearing ratio between the hands.
3. You can't know where the hands are actually pointing.
What you're left with is the ability to alter the timing of the second hand and everything else falls out from that.
- zaxomi 5y agoAt least radio controlled clocks know then all hands are at the 12'oclock position.
- annoyingnoob 5y agoInteresting, thanks for the reply. I think an analog clock that could set the time using NTP over wifi would be a 'killer feature'. Radio clocks just don't work that well in many places. Getting a reply from (presumably) the source is what I love about HN.
- mark-r 5y agoI thought that radio clocks were dead! The US government transmitters that make them work were supposed to be turned off in 2019, and I hadn't heard that the decision was reversed.
- annoyingnoob 5y agohttps://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwvb https://www.nist.gov/pml/time-and-frequency-division/time-di...
- JonathonW 5y agoNIST's original 2019 budget proposal would've defunded and eliminated WWVB, but the final budget didn't-- likely a direct result of the public outcry about the closure.
- eythian 5y agoDCF77 is still going, I have a clock that syncs with it.
- lucideer 5y agoThe 3rd rule is the only one that would prevent NTP correction, & if we're augmenting network access anyway, adding extra features to overcome rule 3 seems like it would be feasible. Some kind of encoder perhaps?