On 11/05/2018 07:23, jimlux wrote:
On 5/10/18 9:55 PM, Hal Murray wrote:
A few months ago, I was a judge for the county level middle school
science
fair. (I'm not very good at what they wanted, but that's a different
problem.)
What sort of interesting time related experiments can a middle s
I built a couple of NTP time servers around this board:
https://www.olimex.com/Products/ARM/ST/STM32-E407/open-source-hardware
which supports IEEE1588. It also acts as a PTP source on the LAN. It is
part of the IPv6 ntp pool and is currently serving about 1000 requests
per minute. It uses a cus
I want to thank the both of you for putting this together.
Philip
p.s. I signed up with the USPS some time ago to get email whenever
someone ships a package to me (https://my.usps.com/) and I just got the
notification (with the tracking number).
On 25/05/2017 16:03, Jerry Hancock wrote:
Hel
I was hoping that someone would design some end plates from PCBs -- it
just needs the PCB design and then the production is easy. I've built
cases before with PCBs as the front and rear panels -- they look nice.
I'm in for a group buy
Philip
On 28/04/2017 08:19, Stan wrote:
I would be in
Yes -- Greenwich is a must. Also read up on why the GPS 0.0 E line
is not on the mark that is etched in the ground. Then walk over to the 0
point and admire your GPS receiver.
The Harrison clocks are a wonder to behold.
Philip
On 26/04/2017 11:46, Graham / KE9H wrote:
If you have nev
I added this message to the Linux kernel near the end of 1993. There is
a companion message that indicates the removal of the leap second -- but
this has never been seen (except in testing!).
In retrospect, it isn't clear that jumping the clock by a second was the
right decision, but, at the t
Bob,
I use the AID-HUI message to get the time of the next leapsecond. I use
the utcWNF and utcDN to get the day number of the next leap second.
Since it always happens at the end of the UTC day, this gives you the
time. utcLS and utcLSF give you the the before/after offsets. Yes, it
doesn't
https://goo.gl/photos/RZKqsgZqv2mH5UYK6
This is a video of my cheapo clock (which is NTP synchronized via an
ESP8266 module running LUA). Actually synched to a local NTP/PTP server
using GPS.
OT When the leap second happened, the kids complained that Netflix
stopped working! Coincidence?
P
This is my clock (NTP synchronized) -- with a bit of luck, the second
hand will stop (for a second) at the appropriate instant (7PM Eastern).
I intend to catch it on video.
Unfortunately, this being an inexpensive clock, the plastic gears result
in the hands not aligning quite correctly (it de
I was also there as the leader of an Official Delegation -- "Engineers
for Accurate Time". Our performance when introduced was sub optimal
(especially as seen in the Youtube video below). This is our delegation
after the awards: https://www.flickr.com/photos/88087539@N00/29469880204/
As you ca
t;Foxbat" etc.
Alan
G3NYK
- Original Message - From: "Philip Gladstone"
To:
Sent: Wednesday, February 03, 2016 1:21 PM
Subject: Re: [time-nuts] Glass Envelope Quartz Crystals
I dug around in my junk box, and found this:
https://plus.google.com/+PhilipGladstone/posts/
I dug around in my junk box, and found this:
https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523
This is (according to the markings) a 71.137 kHz crystal made in 1948. I
suspect that they just measured the crystal after manufacture rather
On 4/8/15 17:13, Attila Kinali wrote:
The Cubie borads and the stuff done by Olimex would be also quite
good. Especially Olimex is known for their very good user support, as
they specifically sell to tinkerers and engineering companies. This
also includes that their boards have almost all I/O p
I'm coming late to this thread from January -- but did anybody ever make
the PCBs for Gerhard's 10MHz output board? I'm interested.
I just got my pair of RFTG's.
Philip
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On 2/26/15 20:39, Charles Steinmetz wrote:
ben wrote:
I'm going to have to build one of these. Assume you have some sort of
circuit that converts low-voltage AC from a transformer secondary to
a pulse train, start a timer, and count x amount of pulses?
Here is a zero-cross detector designed f
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