For digital clocks with analog hands, a 1sec pulse is easily detected by an
electric guitar pick-up. The pulse is the one fed to the stepping motor. I
noticed this while playing (I wear the watch on my right arm). Antonio I8IOV
Da: n1...@dartmouth.edu
Data: 19/04/2014 6.00
I have done that as
When a quartz watch or clock is assembled, what method is used to get it as
accurate as possible?
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The short answer is the vast majority of watches have nothing done to
them short of subtracting off a bias at a single temperature. More
work is done for thermocompensated movements such as measuring offsets
with temperature and creating digital counts tables.
Ronald
When a quartz watch or clock is assembled, what method is used to get it as
accurate as possible?
Bob,
First generation quartz watches had a tiny F/S (fast/slow) trimmer capacitor.
These days it's done with skip cycles and one-time factory calibration. Think
leap days or leap seconds --
I have tried to pick up the oscillator from my wristwatch and have been
unsuccessful.
I tried both magnetic and electric probes. Nothing.
Bob
On Friday, April 18, 2014 4:12 PM, Tom Van Baak t...@leapsecond.com wrote:
When a quartz watch or clock is assembled, what method is used to get it
I've opened up my Casio G-Shock watch, found an electrical point, put an
oscilloscope on it and successfully adjusted it. From memory the frequency
was something weird, but I still tuned it successfully to within about a
second a month. I even think I posted to time-nuts on this...
Jim Palfreyman
Hi
We used to do it with a microphone. Nothing fancy, just a simple little guy
with the inductance resonated out at 32 KHz. The output feed a computing
counter. It worked fine as long as the microphone was in contact with the watch
or watch module.
Bob
On Apr 18, 2014, at 7:25 PM, Bob
I have done that as well. The G-Shocks have a trimmer cap (I have a
DW-6900/module 3230). I don't remember the frequency at the adjustment
test point but it is something like 100 Hz.
David
On 4/18/14 7:40 PM, Jim Palfreyman wrote:
I've opened up my Casio G-Shock watch, found an electrical
