Hi Hal:
The click-click-click... is the self winding. A solenoid vibrates back and forth and a pawl and ratchet winds the main
spring.
https://www.youtube.com/watch?v=QIxOVo_0xgo&feature=youtu.be
Mail_Attachment --
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Hal Murray wrote:
We had something like that in school when I was a kid. (many years ago)
I remember occasional click-click-click... as it got reset.
[email protected] said:
I am wondering what the easiest approach to this might be? I suppose I
could take the 1-sec pulses from a GPSDO (Trimble Thunderbolt ?) and count
3600 of them to generate a momentary reset 3VDC signal. In any event, I
thought I would pass this by the Time-Nuts gang to see if any feedback is
available as to what the least complicated (simplest) way might be to
accomplish this.
Counting to 3600 won't work with leap seconds. :)
I don't know the details of how a pulse sets the clock hands. I assume it
can't set the time to a fraction of a pendulum swing so I don't see much use
for something fancy like a GPSDO. But this is time-nuts, so anything is
possible.
I'd probably split the project into two parts. One is to keep good time on a
computer, say something like a Raspberry Pi. You can use the net, or a low
cost GPS unit, or something fancy like a GPSDO.
The second part is how and when to generate the pulse. You can use GPIO
pins, or modem control signals.
You could use an old PC, but the payback due to reduced power will pay for a
Raspberry Pi in a year or two depending on your power rates and how much
power your old PC burns.
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