I think you could put a 32768 xtal, a trim cap, and an 8 pin AVR (my
preference) onto a very small pcb for about dollar or two.
The advantage of using a micro is that could also add a simple
calibrate function.
For people who like to solder. (but don't like to code).
I'm in the process of designing a tube-saver motion sensor board for
one of my clocks, it's a Jeff Thomas WWVB clock using the
irreplaceable Z568M nixies. No fresh ideas here really, taking the
Panasonic motion sensor used with the Pete Hand FLW clock, adding a
one-shot straight out of the parts'
On Jun 27, 11:23 pm, MichaelB mbari...@dslextreme.com wrote:
Interesting...wonder if he's monitoring this forum? It's all the
rage..ya' know!
Wow, this thread has legs!
I wonder if the continual revisions, or the prior explanation of
'having gotten them from a passed away collector' might be
Wow,
That's a cool tool.Thanks.
Michail
In a message dated 6/28/2011 6:37:27 A.M. Pacific Daylight Time,
nixich...@gmail.com writes:
http://www.toolhaus.org/cgi-bin/negs?User=appleibmlaseresearchDirn=Received
+by
--
You received this message because you are subscribed to the
Great idea...sometimes the simple designs are the most
effectivethe only drawback of course for any of these crystals is
the temperature effect on the crystal and drift. We are not dealing
with NBS traceable standards here but if you a real sticklerI have
some Cesiumjust kidding...the
On Tue, Jun 28, 2011 at 11:37 AM, neutron spin mrstan...@charter.net wrote:
Great idea...sometimes the simple designs are the most
effectivethe only drawback of course for any of these crystals is
the temperature effect on the crystal and drift. We are not dealing
with NBS traceable
32.768KHz has a nice property that it oscillates 2^15 times per second
which makes the timer math easy...I made a calc using the average
tolerance of these crystals and came out to an accuracy of around
0.002 % accuracy or better - about 2 seconds a day. This of course
does not account for
On 6/28/11 10:03 AM, neutron spin wrote:
32.768KHz has a nice property that it oscillates 2^15 times per second
which makes the timer math easy...I made a calc using the average
tolerance of these crystals and came out to an accuracy of around
0.002 % accuracy or better - about 2 seconds a day.
Something like this fitted to my z568 Nixisat clocks would be great. I'm so
worried about my supply and lifespan of my 568 tubes and having sufficiently
distracted by 7971 and in18 clocks lately I have actually unplugged all but one
of my 568 clocks and that one only runs when I'm home because
Well it's intended to be real. I am going to check out premade boards
before I commit to FR-4. I've got the first pass of the layout done.
It needs some tweaking and experimentation, but I see no show
stoppers.
The WWVB clock has a 6 volt VCC. The entire sensor board will run at
six volts, which
Uh, take two. Here is the link:
http://www.parallax.com/tabid/768/ProductID/83/Default.aspx
Sorry 'bout that. Must be the solder fumes...
Jonathan
I'm not a must make guy so if someone can point me to something off-
the-shelf that can do the job, I'll bite.
Terry
--
You received this
Very good price, but that isn't a GPS/WWVB.
I guess you could attach that to another and connect to a WWVB/GPS for
remote location of the receivers instead of a long antenna wire.
Maybe have it connected to your garage door so the clock can open/close the
door depending on the time of day.
On 06/28/2011 01:13 PM, H. Carl Ott wrote:
On Tue, Jun 28, 2011 at 1:03 PM, neutron spinmrstan...@charter.net wrote:
32.768KHz has a nice property that it oscillates 2^15 times per second
which makes the timer math easy..
A little trickier dividing 32768 down to 60hz though.
Anybody got a
13 matches
Mail list logo
