[time-nuts] +AFs-time-nuts+AF0- Wall Clock that takes 1PPS input

[Philip Gladstone]

You don't need a full square wave -- just a 100ms pulse every second with
opposite polarity.

Philip

On Sat, Jan 4, 2020 at 5:16 PM Neville Michie <namichie at gmail.com> wrote:

> It is far simpler to remove the clock battery, connect to the coil
> terminals,
> use a series capacitor and drive with a 0.5 hertz square wave. Just find
> an
> appropriate capacitor for the clock and the square wave voltage.
>
> cheers, neville michie
>
>
> > On 5 Jan 2020, at 05:00, Gregory Muir <engineering at mt.net> wrote:
> >
> > Why not design a circuit similar to the GPSDO approach utilizing the 1
> pps to synchronize a 32.768 kHz oscillator which could be applied to the
> clock's divider input after it's internal oscillator has been disabled?
> You could probably apply the signal directly to where the crystal used to
> reside. This would allow universal application to any cheap clock with an
> accessible crystal..
> >
> > Greg
> >
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