Hi

I think this is one of those really small market items. You can probably cobble one
together from bits and pieces for less than you can buy a good one.

Bob

Maybe not exactly, but I use an app on an old Android cell phone as my UTC wall clock. Large characters in horizontal mode; NTP via WiFi.

⁣Sent from BlueMail ​

On Jun 14, 2018, 20:15, at 20:15, David Andersen dave.andersen@gmail.com wrote:

If you can snag something that will put out IRIG-B, there are lots of choices.

I’m still hunting for something that will take NTP in and put IRIG out. There is probably someone doing it with a Pi or an Arduino.

Bob

Interesting thread.
I guess I would look at things a bit differently.
Most of the IRIG clocks have nice displays and perhaps its a case of
hacking a device take you pick into those fine displays.
I have a really nice 3 RU bright clock that if the brains die thats what I
will do. Its a pretty easy task.
Currently it is being driven by a GPS module + processor jamming time into
Evertz LTC generator.
Its been working for some 20 years this way.
Regards
Paul

On Thu, Jun 14, 2018 at 11:19 PM, Bob Bownes bownes@gmail.com wrote:

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
part (over the SPI bus). It runs NTPD, and so is more than accurate for a
wall clock.

Total cost was less than $100 (if you ignore the money wasted on trying to
revive the old board :-) )
Some details here:
https://github.com/wkumari/symmetricom-nd4-python/blob/master/symmetricom_raspberrypi_clock.py

An example ND-4 on eBay
https://www.ebay.com/itm/New-Symmetricom-ND-4-820-1444-Digital-Clock-Time-Display-90-264v-ac/302748531081?hash=item467d37f989:g:GEUAAOSwpHpbBqm4
-- this one is new, if you wait a while you should be able to find a dead
one...

W

On Thu, Jun 14, 2018 at 9:16 PM David Andersen dave.andersen@gmail.com
wrote:

--
I don't think the execution is relevant when it was obviously a bad idea in
the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair of
pants.
---maf

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 with them but never got
around to it.

I have been having fun with ESP8266's (small cheap microcontrollers with
WiFi) for other projects. If I were to do a NTP clock it would use the
ESP8266 and NTP protocol over Wi-Fi. Not real NTPD, just NTP UDP packets
plus a teeny bit of local dead reckoning.

Tim N3QE

On Thu, Jun 14, 2018 at 9:15 PM, David Andersen dave.andersen@gmail.com
wrote:

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 they look great at the top of the rack!

I have a couple of these, and they drift significantly more than I would like, about 2 to 3 seconds a month. If anyone has seen the manual to one of these, I’d love to see a copy, as the input on the back are unmarked.

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 bownes@gmail.com wrote: