On 1/19/14 8:00 PM, P Nielsen wrote:
It's not clear if the OP wants true local time or the time at the center of
his time zone.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
My original idea was to have 12 noon equate to the sun's highest position in
the sky at my locality, and remain so reliably throughout the year.
There is obviously some very specialized talent in this group, and I would
have trouble following all the suggestions so far. I hope one of the
outcomes of this thread will be a timepiece that a moderately skilled
electronics hobbyist can replicate. For example, I can program PIC's and
build circuits, but not write code. Anything electromechanical is fine.
A one-off solution created in a well-equipped lab as a curiosity piece would
probably not be within my resources. I had originally imagined something
like a PIC coded to deliver modified pulses to a wall clock module. Is it
possible to arrive at anything close to that level of simplicity? For my
use, this was not intended to be a research grade instrument.
Most certainly...
Having got most of the way through it, it turns out that some of the
trickier areas are "user interface"...
A regular old wall clock has a knob on the back to set the time. BUT,
for the solar clock you need to tell it:
1) your longitude
2) What time and date it is (in either local solar time, or in standard
time)
In a mechanical clock, you'd probably set the month and day somehow on a
dial, and deal with the longitude offset by just applying a fixed offset
from local standard time (e.g. I'm at 119W, so I'd set the clock 4
minutes fast, because my time zone's meridian is at 120W, so noon
happens 4 minutes earlier for me)
My going in solution is that you do that with a serial connection (via
USB) and some simple commands.
The vanilla Arduino Uno has a USB connector on it, so it's pretty easy
to use.
_______________________________________________
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.
