To continue dreaming: Since the K3 is a wide band receiver, it
could also automatically update itself from WWV/CHU/etc.
73 Bill AE6JV
On 11/27/14 at 3:01 PM, ro...@monitorsensors.com (Roger Crofts) wrote:
Dear Wayne, are you listening? We need your help to write a little routine that
goes like this:-
When the K3 powers up, it reads an eeprom location which stores
the last turn-on time. It calculates how long ago that was from
the present time. It reads the correction factor in tenths of
seconds per 24 hours from another eeprom location. It
calculates the correction required in tenths of a second and
updates the clock accordingly. It stores the tenths of seconds
remainder in another location ready to be taken into account in
the next calculation. Finally it updates the last turn-on time.
Of course you will realize that an extra menu item will also be
needed, so users can enter their clock correction factor. A
single byte can store a correction factor from -12.7 to +12.7
seconds per 24 hours.
With this software addition, the K3 will become a superb
chronometer. Perhaps once a year the user will need to tweak
the correction factor to allow for crystal aging in the
real-time clock.
-----------------------------------------------------------------------
Bill Frantz | Since the IBM Selectric, keyboards have gotten
408-356-8506 | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?
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