[time-nuts] small multi-timezone display

Wed Jan 13 19:09:21 UTC 2021

I saw this multi-zone clock mentioned today :

https://www.electronics-lab.com/arduino-nano-33-iot-based-ntp-world-clock/

It's not a ready-to-go product nor is it as simple as 4 COTS clocks. It's
possibly also harder to put together than Didier's suggestion, which could
run on a raspberyy pi with an LCD screen. However the design is presented
as something to copy so it's at least not such an open-ended project as
making it yourself from arduinos.

I'm not sure what physical format you wanted. I read it as a row of clocks
rather than a square, arranged to fit on a common screen. Perhaps that's
not important. However if you're interested in something less
computer-like, have a look on aliexpress for 'supermarket shelf edge
display' - there are a number of very wide but low-height displays
available now.

On Sun, Jan 10, 2021 at 10:08 AM Didier Juges <shalimr9 at gmail.com> wrote:

> Well, the latency in the php web page I posted earlier bugged the heck out
> of me so I redid it the "right" way:
>
>
> http://www.ko4bb.com/js/clock/?tz=America/Los_Angeles,Europe/Paris,Asia/Novosibirsk
>
> Now the web page loads a Javascript program that uses the local machine's
> time, the internet is only involved when loading the page initially, saving
> many many electrons!
> If you keep the local machine clock in sync with any of the many ntp or
> sntp apps, the time will be correct (but not necessarily exactly on the
> second, that will be for the next version...)
>
> Here also you can have as many time zones as you want, just add them on the
> command line with a comma separator.
> Time zone definitions can be found on the Wikipedia page:
> https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
>
> Didier KO4BB
>
> PS: the code (it uses the luxon javascript library):
>
> <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml">
> <head>
> <title>World Clock</title>
> <script type="text/javascript" src="luxon.js"></script>
> <script>
> var DateTime = luxon.DateTime;
> var out_str="";
> function getParameterByName( name, url = window.location.href ){
>   name = name.replace( /[\[\]]/g, '\\$&' );
>   var regex = new RegExp( '[?&]' + name + '(=([^&#]*)|&|#|$)' ),
>   results = regex.exec( url );
>   if( !results) return null;
>   if( !results[2] ) return '';
>   return decodeURIComponent( results[2].replace(
>     /\+/g, ' ' ));
> }
> function load(){
>   setInterval( function(){ putAllTimes();}, 1000 );
> }
> function putAllTimes(){
>   DateTime = luxon.DateTime;
>   var tzs = getParameterByName( 'tz' );
>   var tza = tzs.split(",")
>   tza.forEach( putOneTime );
>   document.getElementById( 'time' ).innerHTML = out_str;
> }
> function putOneTime( tz, index ){
>   var ttime = DateTime.fromObject({zone: tz});
>   if( index == 0 )
>     out_str = tz + ": " +
>     ttime.toLocaleString(DateTime.DATETIME_MED_WITH_SECONDS) + "<p>";
>   else
>     out_str += tz + ": " +
>     ttime.toLocaleString(DateTime.DATETIME_MED_WITH_SECONDS) + "<p>";
> }
> </script>
> </head>
> <body onload="load()">
> <h2>KO4BB's World Clock</h2>
> <div id="time">
> </div>
> </body></html>
>
>
>
> On Sat, Jan 9, 2021 at 5:23 PM Mark Spencer <mark at alignedsolutions.com>
> wrote:
>
> > This thread prompted me to turn on my old IPad1 and I confirmed the
> > Emerald Time app I downloaded many years ago is still functional.
> >
> >
> > Mark Spencer
> > mark at alignedsolutions.com
> > 604 762 4099
> >
> > > On Jan 8, 2021, at 12:16 PM, paul swed <paulswedb at gmail.com> wrote:
> > >
> > > Old iphones maybe cheap or you may have one. Since LTE4 I guess is in
> the
> > > process of being turned off old iphone 5s will no longer work.
> > > My wife now has a iphone 6 and I have ordered a battery for the 5
> because
> > > it is a useful widget that looks good and can use wi-fi.
> > > Granted thats a small screen and thats why earlier I was suggesting one
> > of
> > > the larger nice tablets. I have an Asus tablet driving a 27" screen 24
> X
> > 7.
> > > I am actually looking at clock programs to load onto the asus. Just
> > started
> > > looking last week.
> > > Regards
> > > Paul
> > > WB8TSL
> > >
> > >> On Fri, Jan 8, 2021 at 2:50 PM John Sloan <jsloan at diag.com> wrote:
> > >>
> > >> I’d investigate whether there was an Android “World Clock” app whose
> > >> display had your requirements, then buy an Android tablet in your
> price
> > >> range and with the appropriate form factor. (I like the “World Clock”
> > app
> > >> on my iPhone, but I’ve never encountered a cheap iPhone.)
> > >>
> > >> --
> > >> J. L. Sloan            Digital Aggregates Corp.
> > >> +1 303 940 9064 (O)    3440 Youngfield St. #209
> > >> +1 303 489 5178 (M)    Wheat Ridge CO 80033 USA
> > >> jsloan at diag.com        http://www.diag.com <http://www.diag.com/>
> > >>
> > >>> On Jan 8, 2021, at 8:29 , time-nuts-request at lists.febo.com wrote:
> > >>>
> > >>> [time-nuts] small multi-timezone display
> > >>
> > >> _______________________________________________
> > >> time-nuts mailing list -- time-nuts at lists.febo.com
> > >> To unsubscribe, go to
> > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> > >> and follow the instructions there.
> > > _______________________________________________
> > > time-nuts mailing list -- time-nuts at lists.febo.com
> > > To unsubscribe, go to
> > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> > > and follow the instructions there.
> >
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com
> > To unsubscribe, go to
> > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> > and follow the instructions there.
> >
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>