-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges Sent: Thursday, September 04, 2008 11:24 PM To: 'Tom Van Baak'; 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Driving clocks from 1pps
> > Ah, I see now. It's a 0.5 Hz square wave. Cool. Yes, that looks like > it might work. Has someone tried this on a quartz clock stepper motor > to make sure you reliably get sufficient impulse? > I wonder why no commercial clocks use this trick. > > /tvb > > The capacitor gets too large for a commercial watch or clock, silicon is cheaper. Didier KO4BB Besides, the power consumption is probably lower with a well defined pulse than with the capacitor, and it's easier to keep a tight tolerance on a pulse width than on the value of a large electrolytic capacitor. Didier _______________________________________________ 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.
