[time-nuts] Re: Crazy Clock

[Adrian Godwin]

On Thu, Dec 15, 2022 at 5:09 AM Bob Camp via time-nuts <
time-nuts at lists.febo.com> wrote:

>
> 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.
>

The only thing I can see a need to feed-back is the local time offset,
possibly including daylight savings time. So I think I'd use a conventional
crystal-based clock mechanism but replace the crystal with a 32768Hz source
locked to a GPS module in the same way as a GPSDO. It would also need a
reasonably good holdover oscillator as, assuming you want a self-contained
clock, the GPS signal indoors (once considered impossible) may be
inadequate in some locations.

So the time display would be completely under your control, but the tick
rate would be as accurate as you can get.