No bootloader, I'm using an AVR ISP mkII to load the avr-gcc code.
On Sat, Mar 29, 2014 at 5:43 AM, Lars Walenius lars.walen...@hotmail.comwrote:
Do you use the Arduino bootloader and environment (code)?
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for the same temperature.
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Eric Williams WD6CMU
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I'm sorry, I don't recognize the reference to hanging bridges.
I don't consider it a PLL because I have no way to measure phase
differences within a cycle.
I have some serial debugging output to see what the code's doing, but I'll
have to think about how to organize it into graphs that would be
OK, now I understand the reference, but not the significance in this
context. The sawtooth error is below the resolution of the counter here.
It does produce noise on the transition between capture counts that I am
filtering out, but it should average out over the long-term integration
that I'm
PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On Fri, Mar 28, 2014 at 5:15 PM, Eric Williams wd6...@gmail.com wrote:
OK, now I understand the reference, but not the significance in this
context. The sawtooth error is below the resolution of the counter here.
I think you are right
I've been hearing about PTP in a few places. Does anyone here have
experience with it to know if it would provide better performance in a
situation like this?
On Sun, Sep 29, 2013 at 5:11 AM, Anders Wallin
anders.e.e.wal...@gmail.comwrote:
Thanks for all replies,
I can try changing maxpoll
He tells me with some bitterness that politics triumphed over
all of the objections of the engineering staff to LS and that this
is not the first time that this has happened.
That's how we ended up with Challenger and Columbia.
On Tue, Sep 17, 2013 at 6:46 AM, Michael Baker mp...@clanbaker.org
Would be nice if someone did a Linux port of LH that could run on a
Raspberry Pi or something, then you could embed it into your T-Bolt
installation. Plug in a HDMI monitor if you want to look at it all the
time, or come in remotely via Ethernet.
--
eric
On Sun, Aug 18, 2013 at 9:00 PM, Chris
Maybe low-profile rs232?
Something like: http://www.cablestogo.com/product/52138
On Thu, Jul 25, 2013 at 1:51 PM, Hal Murray hmur...@megapathdsl.net wrote:
After all the discussions about the cost of power, I'm getting my act
together and replacing my old power hungry PCs with new/modern
Or mold some Polymorph https://www.sparkfun.com/products/10951 around the
DB-9.
On Thu, Jul 25, 2013 at 3:28 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
Make your own cable from a bare DB-9 connector, solder and shrink tube.
On Thu, Jul 25, 2013 at 2:54 PM, Eric Williams wd6
We use an Agilent 8644B where I work as the master oscillator for an
electron cyclotron storage ring. Electrons at 2GeV don't like to be pushed
around and are very sensitive to phase noise, so the feedback loop that
adjusts the frequency uses the FM input for fine adjustment.
--
eric
On Wed,
I wonder if lithium batteries would have a good noise figure. The
nano-structure of the electrodes give them very large surface area and low
resistance, but the charge carriers are different than other types of
chemistry and I don't know if that's good or bad.
On Wed, Jul 10, 2013 at 9:01 AM,
For those running a net4501 NTP server with the original clock, there are
some 33.333MHz TCXO modules on ebay for sale, item #181008085393. I
haven't received mine yet so I can't guarantee they will work, but they're
3.3v parts, so I think they will. They are Chrystek CXOHV8-HF3-33.333MHz,
data
What did they leave out of the hardware? Hard to tell what to look for
when it's not there.
Thanks for sharing your experience.
--
eric
On Mon, Jul 1, 2013 at 10:43 PM, NeonJohn j...@neon-john.com wrote:
Before anyone wastes his money on a BeagleBone, I suggest you join the
mailing list and
I have a practical application for this, I'm anxious to see your web page
on how to do it. Thanks.
--
eric
On Thu, Jun 20, 2013 at 12:37 PM, Gabs Ricalde gsrica...@gmail.com wrote:
On Thu, Jun 20, 2013 at 3:39 AM, Chris Howard ch...@elfpen.com wrote:
Are you using the original BeagleBone
I ran a modified wall clock driven by a homebrew Oncore/AVR uController box
for a few years. It worked pretty well even though it was open loop, I had
code for synchronizing the second hand with the GPS, and it would wind
itself forward to adjust for DST. Eventually it broke down, so I bought an
clock that displays the correct time and left out
the space between on and time?
On Mon, May 27, 2013 at 11:21 AM, Eric Williams wd6...@gmail.com wrote:
If you want a project, you should be able to get an older Android tablet
or
a Chumby 8 for $100 or less and hack it to do what you want
If you want a project, you should be able to get an older Android tablet or
a Chumby 8 for $100 or less and hack it to do what you want. Hard to beat
the price for the hardware you get.
I'm happy with my OnTime dial clock.
On Mon, May 27, 2013 at 8:14 AM, Bob Camp li...@rtty.us wrote:
Hi
I also have a SkyScan clock that is claiming to be synced to WWVB, but is
slowly drifting off. I've replaced the battery and it synced at least once
after DST conversion, Two other WWVB clocks are working as they should.
On Tue, Mar 19, 2013 at 1:55 PM, Clint Turner tur...@ussc.com wrote:
A
http://newscenter.lbl.gov/news-releases/2012/09/24/a-clock-that-will-last-forever/
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things.
Hmm just need an ion trap or two. Maybe I will have to stick to GPS and
WWVB for a bit.
Regards
Paul
WB8TSL
On Tue, Sep 25, 2012 at 1:12 PM, Eric Williams wd6...@earthlink.net
wrote:
http://newscenter.lbl.gov/news-releases/2012/09/24/a-clock-that-will-last-forever
Item # 180688345029, Buy It Now, $3.99, free shipping.
On Mon, Aug 13, 2012 at 6:31 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On Mon, Aug 13, 2012 at 6:20 PM, paul swed paulsw...@gmail.com wrote:
impressive
Shame there is not a buy now. 1cent plus $4 shipping and you have to
My nptns server didn't register the leap second. Did I do something wrong?
--
eric
tick# telnet localhost 123
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
NTPns show leap
Source StateUnknown No Insert Delete
oncore_0 UTC
Typical of technology companies that have more lawyers on staff than
engineers.
On Mon, Jun 4, 2012 at 5:09 PM, Tom Knox act...@hotmail.com wrote:
Lightsquared is like a cockroach every time you think it is dead it shows
up again.
Thomas Knox
1-303-554-0307
Date: Mon, 4 Jun 2012
Could the CPU be reducing its clock rate when it's not being loaded? Just
a guess, most multi-core processors these days have power saving features
like that.
--
eric
On Wed, Apr 4, 2012 at 3:22 PM, Mike S mi...@flatsurface.com wrote:
I asked this on an NTP list, got some guesses, but no
http://www.thedailybeast.com/articles/2011/09/15/lightsquared-did-white-house-pressure-general-shelton-to-help-donor.html
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and
Same here, my Net4501 has been running over 2 years without a reset.
A Soekris-based NTP server uses the counter/timer built-in to its
embedded processor to give you better precision interval measurement
than a serial port, but if you're not interested in anything better
than ms accuracy then it's
-ng7ly6o2ybl_ypcqp95v...@mail.gmail.com, Eric Williams
writes:
Same here, my Net4501 has been running over 2 years without a reset.
That is more a matter of power-supply than anything else:
critter phk ssh root@xdcf uptime
11:04PM up 764 days, 4:01, 0 users, load averages: 0.20, 0.16
I knew someone who worked with 100% isopropanol who said there was some
safety issue with using it in that, if it ignited, the flame was virtually
invisible.
On Mon, Jan 3, 2011 at 4:21 PM, jimlux jim...@earthlink.net wrote:
li...@lazygranch.com wrote:
Most drug store isopropal contain other
If you can GPS-sync your network with NTP, you can run an Inova OnTime
clock with it. They can be had for as low as $250 or so.
On Tue, Mar 30, 2010 at 8:12 AM, Dave Lance bassguitarm...@yahoo.com wrote:
I would like to buy a reasonably priced GPS synced
display clock. It would need an
Ed,
As I recall, the Heath receiver scanned three WWV frequencies (5, 10, and
15MHz?) and stopped on the one with the strongest signal. It would stay
there for a minute or two and move on if it couldn't hear the burst tone at
the top of the minute. If it heard the tone, it would stay put and try
First thing, clean the tin-plated board edge connectors and the
corresponding connectors on the motherboard. I always had to do that every
year or two to keep mine working. Squirt some cleaner on the spring
contacts and work the board up and down.
--
eric
On Tue, Feb 9, 2010 at 10:35 PM, Don
Don't know if you are more interested in building such a clock, or just
having one. If the latter, one possible option is the Innova OnTime series,
which are NTP time displays. One place to buy them is here:
http://www.networkcablesonline.com/Network-Clocks/c97/index.html
These commercial
I used to work with CDF. Wildfires are measured in chains, not acres.
Property lots in the US are located by range and township. It's a system
where the origin moves from place to place. I was told the founding fathers
invented it to make it purposely hard for a central government to find
Bryan Mumford (bmumford.com) did a lot of work developing pendulum clocks
that were driven by a Fedchenko electromagnetic drive. The drive circuit
would both put energy into the pendulum and use the pulse to drive an
electric clock face to display the time. He never got to the point of
If someone is taking suggestions, I just thought it would be nice if I could
get 9 values for the accumulated amount of time spent receiving N
satellites, where N goes from 0 to 8. (Or more, for newer T-Bolts.) Seems
like it would be useful for evaluating and comparing the quality of antenna
Yup, running my T-bolt on an indoor patch antenna hoisted to the apex of a
skylight. Works fine.
My GPS NTP server uses a bullet antenna mounted on a short (~1ft) pole
bolted to a block of wood on the side of the house, feedthrough is PVC pipe
going through the wall with a 45-degree coupler on
I've been using a Edirol FA-66, a firewire box with two balanced inputs
plus four more unbalanced. I think it can handle 192ks/24bit on 4
channels. A lot of hams use it for software defined radios, but I just
know it has better sound, especially the lows, for playing MP3s compared
to most
Michael Baker wrote:
Just ducked out of my cave to let you know that
you are a troublemaker. Get another T-bolt... Right.
--Just what I need... another techno-addiction. As far as
sweet innocence is concerned, I lost all I ever had
when I jumped head-first into bench-rest rifle competition
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