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 <[email protected]> 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 > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
