Check the Scientific American Amateur Scientist index for clocks here: http://amasci.com/amateur/sciamdx.html#52-CC It looks like the September 1974 issue has the article on using discrete cmos logic to synchronize a pendulum clock to a quartz crystal.
Tom WB6UZZ --- On Sun, 12/11/11, Brian, WA1ZMS <[email protected]> wrote: From: Brian, WA1ZMS <[email protected]> Subject: [time-nuts] synch for pendulum clock.... To: "Time Nuts" <[email protected]> Date: Sunday, December 11, 2011, 1:32 PM This was talked about several years ago, but did anyone get a fully functional design running using electromagnets to synch at one or both ends of the travel? In the meantime I am using a sensor to measure the time period of the pendulum for this particular new grandmother wall clock and from that, I can synthesize a pulse train from one of the 10MHz lab clocks to drive the electromagnets to cause a subtle synch at the end(s) of the pendulum travel. The pulse train freq is custom for a given clock. Anyway...... that's my scheme for now. Feedback welcome. -Brian, WA1ZMS _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
