On Tue, 02 Mar 2021 22:42:45 -0800
Hal Murray <[email protected]> wrote:
The basic idea is to mount a magnet on a stiff wire so that it sticks
out to
the side of the pendulum arm, then mount a coil so the magnet will
swing
through it. Now pulse the coil to get the desired results.
On 2021-03-03 02:54, Attila Kinali wrote:
This is basically injection locking of a pendulum clock.
Pendulum clocks are very nice for injection locking, due
to their relatively low Q and because a magnetic field can
be easily adjusted in strength.
I don't have the reference at hand right away, but I did see an article
in the past describing a mechanism which placed the magnet on the end of
the pendulum, and had one coil to sense the magnet swinging past, and
another coil to provide the impulse to the pendulum. The timing of the
impulse was controlled by a microcontroller, so it could provide some
rough phase locking function by varying the time between the detection
pulse and the driven impulse, and maybe the amplitude or length of the
impulse.
If there is interest I can see if I can find that article again, but
that may be straying from the original request, which seemed to be
looking for something with a digital display.
--
Chris Caudle
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