Re: [time-nuts] Mechanical clock sound pickup circuit

On 12/14/15 9:12 PM, ed breya wrote: This may be totally ridiculous, but maybe there's another way to get a balance wheel signal. The X-band Doppler type microwave motion detectors can pick up various object signals in free air from quite a distance, so maybe up close there would be enough

Re: [time-nuts] Mechanical clock sound pickup circuit

This may be totally ridiculous, but maybe there's another way to get a balance wheel signal. The X-band Doppler type microwave motion detectors can pick up various object signals in free air from quite a distance, so maybe up close there would be enough resolution and penetration of the metal

Re: [time-nuts] Mechanical clock sound pickup circuit

Let's be serious here. Radar is the wrong part of the E-M spectrum. Use light. It is cheap, easy to detect, and there are plenty of reflections to go around. Or better still, listen to the tic. Then you don't even have to open the case Which brings this full circle. -Chuck Harris Jim

Re: [time-nuts] Mechanical clock sound pickup circuit

Hello. One answer for all. > Peter > The watch or clock produces many sounds during its operation and the issue > is selecting the required one. As you wish to investigate the timing I noticed it, unfortunately it seems that often the different sounds are very similar in level. I'm thinking

Re: [time-nuts] Mechanical clock sound pickup circuit

Maybe this can be useful to make the pick-up: http://www.meas-spec.com/downloads/LDT_Series.pdf they can be found also on the usual auction site. On Sat, Dec 12, 2015 at 10:28 PM, Alexander Pummer wrote: > > Once upon the time there was a "Vibrograph", see nice pictures here:

[time-nuts] Mechanical clock sound pickup circuit

Hello! I decided to do some experiments with mechanical clocks, so I worked a little on picking up escapement ticking sound, with the idea of processing it and obtaining a "clean" digital pulse to feed a counter. So far, I have not yet been able to find the best way to obtain a digital pulse,

Re: [time-nuts] Mechanical clock sound pickup circuit

Back in the day, companies, like Vibrograf, Greiner, Elna, L, all made timing machines that were based on the same principles. The machines used a crystal, or tuning fork frequency reference, and divided it down for the various standard (and not so standard) watch beat rates. The divided

Re: [time-nuts] Mechanical clock sound pickup circuit

HI You *may* find that moving the passband of the mic up above 4 KHz helps things a bit. An analog high pass filter that rejects normal speech and low frequency rumble ahead of the detection process wold be the old school way to do it. The degree to which that helps depends a bit on the tick

Re: [time-nuts] Mechanical clock sound pickup circuit

Andrea, The watch or clock produces many sounds during its operation and the issue is selecting the required one. As you wish to investigate the timing function may I suggest that you incorporate some form of level control to eliminate minor signals and allow only the strong sounds from the

Re: [time-nuts] Mechanical clock sound pickup circuit

Someone is in the process of writing open-source watch timing software. You may want to look into it. It was announced here: http://forums.watchuseek.com/f6/open-source-timing-software-2542874-post21977314.html#poststop It contains these links: First the goodies. Here are Windows binaries

Re: [time-nuts] Mechanical clock sound pickup circuit

Once upon the time there was a "Vibrograph", see nice pictures here: https://www.google.com/search?q=vibrograph=isch=u=univ=X=0ahUKEwigtcmSn9fJAhUW8GMKHVNyAMcQsAQIHA=1760=888 ,which picked up the sound of watches, clocks, and the watch maker was able to set the watch very accurately, these

[time-nuts] Mechanical clock sound pickup circuit

And check out Bryan Mumford's stuff at bmumford.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.