Thank you both for the education. - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
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and
Takes advantage of the isolated, balanced-mode twisted-pair ethernet wiring
standard to send power - like phantom power to a professional microphone.
On Mon, Jun 18, 2018 at 5:36 PM, Bob Bownes wrote:
> Power over Ethernet. 48V shipped down the ethernet wires. Generally used to
> power IP
Power over Ethernet. 48V shipped down the ethernet wires. Generally used to
power IP telephones, but WiFi Access points and other technologies have
jumped on the bandwagon as well.
On Mon, Jun 18, 2018 at 12:25 PM, Mike Feher wrote:
> Hi all -
>
> Sorry for an ignorant question from an old
Hi all -
Sorry for an ignorant question from an old man, but what does PoE stand for?
Thanks & Regards - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
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We have had good luck with several (8) of these SNTP POE units:
https://www.amazon.com/TimeMachines-Precision-Digital-Clock-Digits/dp/B002R7KHAM/
Sturdy black metal case. I don’t think we’ve fried any in a year plus. I
knocked one or two onto a carpeted floor from a modest height and it
For that price (the ND-4), you can get a new NTP-synced PoE-powered clock:
http://www.brgprecision.com/products/synchronized_clocks/poeclocks.php
I built a time display with a Raspberry Pi, an Adafruit GPS, and a
Fundamental Logic USB7 serial LED display, but the numbers didn't flip
elegantly or
A while back I purchased a Symmetricom ND4 clock on eBay -- it was lasted
as "Not Working / for parts only", and it turns out that was true -- the
processor board had issues. I wasted much time trying to fix it, and then
simply removed it -- I'm now using a Raspberry Pi Zero to drive the display
That is a great price and the shipping is $12 for a rack mount piece of
equipment.
How on earth can he do the shipping for that cost?
Regards
Paul.
On Fri, Jun 15, 2018 at 2:51 PM, Bob Bownes wrote:
> IRIG-B generator/displays candy had on eBay for very little money. There’s
> one currently
IRIG-B generator/displays candy had on eBay for very little money. There’s one
currently listed for about $10.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F202337773272
Feeding one of these with the aforementioned NTP to IRIG – B is the easy
solution. And
At work we have POE LED clocks, I think 2.5", circa $400-$500. So your $300
price you've been seeing is about right.
In terms of homebrew:
I bought a bunch of 3.5" high green Seven-segment displays 10+ years ago.
Cheap, really cheap at the time!
Was always intending to build a 6-digit clock
Hi
There are an enormous number of displays out there that will interface with the
little boards. You can spend a little or you
can spend a *lot*. At least in terms of size, it is a bit of a “you get what
you pay for” sort of thing. Some of the larger LED
arrays look pretty impressive. Cost
My reason to hack up a nice clock display is because no matter what I can't
make my home brew stuff look as nice.
So to me its a pile of displays in a nice rack box that I hook a processor
to and do what ever I like.
Reversing out the display methods pretty easy as they are typically
multiplexed.
Thanks, all - sounds like either finding a cheap IRIG display or hacking up
a pi/arduino/etc. version will be the path forward. The IRIG displays I
can find quickly on ebay are still priced for people building music
studios, so...
RPi 3 B+ supports PoE with an extra hat, and you can get
What about the clock part of the old AN/GSQ-53A frequency/time rack?
It wasn't NTP of course, but ran off of 1 MHz (as I recall) and
generated IRIG-B for remote displays. The rack included a nice Sulzer
crystal oscillator (plus a spare), later upgraded to HP rubidium RVFS
(5061A?).
There
By the way I have hacked IRIG B using a proc called SXB and basic language.
The specs are out there and its not all that hard.
Two tricks that really simplify it. (Everything could be done in software)
Use a stable external sine wave 1 KHz oscillator. I used a epson dip
oscillator pretty stable.
One of the cheapest NTP servers that can be built would be an arduino Uno, CE
version for around $10, an LCD display shield with buttons for $15 and an
Ethernet shield for $8.95. But getting all that to stack didn’t work, so I had
to use jumpers to the LCD part shield.
Then add one of the 6
Hal,
I remember there being such a thing, but a search of the ntp site turns up
nothing. Anything you can provide would be most welcome.
Thanks!
Bob
On Fri, Jun 15, 2018 at 12:20 AM, Hal Murray
wrote:
>
> bow...@gmail.com said:
> > I’m still hunting for something that will take NTP in and
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