[time-nuts] Re: Crazy Clock

[Alexander Huemer]

As pointed out by other people already, there are several analog wall 
clocks out there that can be set by external means like NTP, GPS, etc.
In my mind they all suffer from the same flaw, which is their 
functionality is restricted to advancing time in precise increments but 
don't "know the time". I.e. if power goes away and comes back, you'll 
have to set such clocks by hand, even though their motor function can be 
influenced. What is lacking is a set of 3 absolute position rotary 
encoders with 6° resolution like described at [1] which referenced [2].
Somebody^{TM} should put such a clock together. 3 such encoders, a 
stepper motor with gears to arrive at 6°, the rest is just software.

-Alex OE2AHL

[1] https://www.instructables.com/Absolute-Position-Encoder-With-Single-Track-Gray-C/
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6111776/

On Tue, Dec 13, 2022 at 03:09:26PM -0500, Bob Camp via time-nuts wrote:
> Hi
> 
> I realize that this is a bit of an odd project, but this is Time Nuts …..
> 
> I want a analog wall clock that reads out GPS time. As far as I can tell, nobody
> is crazy enough to make one and sell it in the open market. If indeed there is
> one out there, that would be great. This does not have to be a project.
> 
> If it is a project, I’m lazy, I don’t want to set the thing and then count on it never 
> missing a beat. I want a movement that has some form of feedback. The 
> WWVB clocks have a movement like this. I could tear one apart and try to 
> reverse engineer the guts. That sounds like. a project inside a project.
> 
> Does anybody sell feedback movements like this in the hobby market? If so has 
> anybody used one and can vouch for it working for more than a few months? 
> 
> Indeed, doing it with a display of some sort would be easier in some respects.
> For now at least, I’m looking for a mechanical gizmo with hands that move. 
> If it reads out 12 hour time that’s ok. 24 hour time would be super cool, but
> it’s not vital. 
> 
> Anybody know of a source?
> 
> Thanks!
> 
> Bob
> 
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