Hi! I found a copy at <https://www.g8wrb.co.uk/useful-stuff/time/pdf/pendulum+quartz.pdf>
Edésio On Tue, Mar 02, 2021 at 10:42:45PM -0800, Hal Murray wrote: > > Maybe one day I'll make this work with a grandfather clock. > > Many years ago, Scientific American had an article describing adding a magnet > to the pendulum and the circuitry to drive it. > > 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. > > Scientific American, September 1974, Amateur Scientist > A venerable clock is made highly accurate by equipping it with quartz-crystal > works > > They want $8 for a pdf. > https://www.scientificamerican.com/article/the-amateur-scientist-1974-09/ > > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > 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.