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

Neville Michie namichie at gmail.com
Sat Jan 4 22:15:17 UTC 2020


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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