Further, having owned one of these clocks for a brief period before the
holidays, WWVB doesn't have reliable coverage during the day (since it's
affected by the same propagation issues as AM radio, if not more so). The
clock I had (available at Sam's Club for about $25) set itself only once a
day, assuming it got a signal in one of six hours from midnight to 6am.
Maybe this is what was meant by "sets six times a day", but for what it's
worth, my clock's manual said it only set once, if successful, but tried up
to six times until it did.
I honestly don't see the advantage in running so close to the time
standard....if you want an accurate timebase, use the color burst signal
from a local TV station....their timebase is every bit as accurate as what
you'll get from WWVB, and most are available 24 hours a day. -- For direct
replies, take out the contents between the hyphens. -Really!-
"Tony Hwang" wrote in message ...
tommyknocker wrote:
Dennis wrote:
HI,
Does anybody have a circuit that will
decode the WWVB signal,and output to a clock
led circuit?
TIA,
Dennis
Hi,
Unless you want to have fun building a clock, there are many such clocks
or watches out there. I wear a watch. Very accurate in time keeping.
Tony, VE6CGX
Yes, I have one of these clocks also. The thing is, these clocks
are set 6 times in a 24hr perod by the WWVB signal. The rest of the
time the time base is an ordinary crystal. I want my clock to be
set on a more continous basis. This could only happen with the
continous decoding of the signal. This is how the "professional"
clocks, such as those made by Spectracom work.
-Dennis
You'll find that most of the schematics on the net for atomic clocks are
of the crystal variety-they set once or twice a day with WWVB and the
rest of the time use a crystal. You'll have to do some digging to come
up with something that does continuous decoding, but I'm sure it's out
there.
Hi,
That is just a WWVB reciever, ins't it?
Tony, VE6CGX
|