This might be desirable. https://www.ebay.com/itm/THE-AMATEUR-SCIENTIST-ON-CD-ROM-LATEST-EDITION-VERSION-4-M2071-/112117678275
On Wed, Mar 3, 2021 at 4:19 PM Chris Caudle <6807.ch...@pop.powweb.com> wrote: > > > On Tue, 02 Mar 2021 22:42:45 -0800 > > Hal Murray <hmur...@megapathdsl.net> 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 > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.