[time-nuts] Re: Domestic time pulse transmission

[Adrian Godwin]

I have a Bulle electrically powered pendulum clock. It has a contact
mounted to pulse a coil at a certain point of the pendulum's swing. I've
obtained a good pulse by monitoring the current in the coil with a current
probe, though voltage methods or even a pickup coil near the solenoid would
work.

On Fri, Aug 4, 2023 at 9:12 PM Lux, Jim via time-nuts <
time-nuts at lists.febo.com> wrote:

> On 8/4/23 2:47 AM, john.haine--- via time-nuts wrote:
> > I'm wondering if the group wisdom could help me work out a good way to
> send
> > a ~1pps pulse from a mechanical clock to a time monitoring system?  This
> is
> > for a pendulum clock project where the clock is electronically controlled
> > and I want to measure its timekeeping remotely to avoid having to build
> the
> > time reference and logging R-Pi into the case.  I do not want to have to
> run
> > a cable from the room where the clock will be to the place where the
> logging
> > is done, so the options are radio or using the mains wiring (the clock
> will
> > be mains powered with battery backup).  Obviousy there are options such
> as
> > the cheap 433MHz transceivers that are available which I am
> investigating,
> > but does anyone here have any experience of techniques that work (or,
> just
> > as importantly, don't work!) please?
> >
> >
>
>
> what kind of timing uncertainty is acceptable? milliseconds?
> microseconds? femtoseconds? (the latter will be difficult)
>
> Do you mind having "missing ticks"?
>
> The 433 MHz remote pushbutton/doorbell works, there will be a sort of
> fixed offset between "contact closure" on one end and the other, and
> sporadic interference/jamming from other devices in the band will be an
> issue, hence the missing/delayed tick question.
>
> Think garage door opener.
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe send an email to time-nuts-leave at lists.febo.com
>