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

[Matthew D'Asaro]

I don't know of one available commercially, but it would not be hard to modify a standard quartz clock to do this. The standard quartz mechanism uses a motor that advances the seconds hand one second each time a pulse is applied to it. The catch is that every other pulse has to be the opposite polarity. A simple circuit consisting of a single D flip-flop could be constructed to provide this alternating phase functionality.

Matthew

Sent from Matthew D'Asaro's iPhone

> On Jan 2, 2020, at 10:21 AM, Jerry Hancock <jerry at hanler.com> wrote:
> 
> Hello,
> 
> I looked around but can’t find a wall clock that would take a 1PPS input signal to drive the minutes and seconds.  I’ve made digital modules using a lot of different displays but would love to have a large, 14” or so with a second hand, wall clock that I can drive with 1PPS.  The old IBM clocks, etc I found take a pulse on the minute.  I have an old pendulum clock I can drive with a solenoid but thought I would ask here before going that route.
> 
> Signal levels aren’t important.
> 
> Thanks
> 
> Jerry
> 
> 
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