[time-nuts] Affordable PoE 6-digit time displays?

Bob Bownes bownes at gmail.com
Fri Jun 15 14:51:28 EDT 2018


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. 

> On Jun 15, 2018, at 14:38, Tim Shoppa <tshoppa at gmail.com> wrote:
> 
> 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 at gmail.com>
> wrote:
> 
>> I'd hoped that ebay or aliexpress would yield a bounty given how seemingly
>> simple these are, but I'm drawing a blank (and finding a lot of $300+ new
>> options).  Anyone have a favorite source for either flat wall-mount or
>> rackmount displays that will pull from an NTP/SNTP/whatever server?
>> 
>> (if wall-mount, PoE is optimal).  Used good.  Cheap good.  Looks good next
>> to my random collection of antiquated time measurement gear provides
>> amusement value but isn't really critical. :-)
>> 
>> Thanks!
>> 
>>  -Dave
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