Re: [time-nuts] World's most precise.... wall clock

> 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,

Re: [time-nuts] World's most precise.... wall clock

Here are a few online projects for GPS-controlled clocks. Most (all?) have a PIC or Arduino to run the clock and sync to GPS time. [ http://w8bh.net/avr/clock2.pdf | http://w8bh.net/avr/clock2.pdf ] https://www.elprocus.com/how-to-build-a-gps-clock-using-arduino/

Re: [time-nuts] World's most precise.... wall clock

Eamonn, Here are a couple of ideas for you: 1) You may find some GPS / NTP / 1PPS / 10 MHz precise time friendly professional clocks at: https://www.masterclock.com/ 2) If you have a 50/60 Hz mains wall clock you can always use this trick: http://leapsecond.com/pages/atomic-nixie/ 3) You

Re: [time-nuts] World's most precise.... wall clock

On 3/2/21 4:32 PM, ed breya wrote: If you can open it up and get at and identify the crystal, you can synthesize its ideal frequency from a GPSDO output, then run it in there in place of the crystal. I did this for a 24hr Mars clock using a 3325 to generate 31947.2745 Hz

[time-nuts] NPL courses on time and frequency measurement

It looks like NPL are in the process of creating some courses on this. Introduction to Time and Frequency Measurement https://elearning.npl.co.uk/enrol/index.php?id=53 I think I read something on the NPL site to imply that was free, but I can't see that now. Anyway, it's not available yet, but it

Re: [time-nuts] World's most precise.... wall clock

If you can open it up and get at and identify the crystal, you can synthesize its ideal frequency from a GPSDO output, then run it in there in place of the crystal. Ed ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] World's most precise.... wall clock

Hi, I had same question several years ago. You're gonna have to roll your own. Look here On Tue, 2 Mar 2021 17:38:24 -0500, Eamonn Nugent wrote: >Hi! >I have a perhaps silly question. I want to take an inferior medium (our

[time-nuts] World's most precise.... wall clock

Hi! I have a perhaps silly question. I want to take an inferior medium (our eyes) and give it something attractively precise to look at. Is there such a thing as a digital (wall) clock with a 1PPS/10MHz/etc. input? I see that some clocks have GPS antenna inputs, but I want to take a GPSDO and

Re: [time-nuts] Old Crystal.

Hi You don’t necessarily need to convert to a 12.5 ohm system. A lot depends on just what your objectives are. It a bit like needing a fancy Fluke Hart Chub thermometer if you are only after a couple of degree accuracy. The tools vary depending on the job. Bob > On Mar 1, 2021, at 3:23 PM,