[time-nuts] locate 6 digit digital clock

J. Forster jfor at quik.com
Wed Jun 8 19:10:26 UTC 2011

Why not just buy or scrounge a small microwave oven or VCR?



> Please add my "me-too" to this discussion.
> I would like to see a clock that simply tells time,  reminiscent of the
> ones I put together in the 1970s, but with LED displays
> large enough to read from across a darkened room. I would prefer 24-hour
> format and I want a 6-digit display with seconds.
> For accuracy, I would want an internal TCXO, with the option of using a 10
> MHz or 1 PPS external signal when available,
> but I want the clock to automatically switch to the internal timebase if
> the external signal is disconnected or lost
> With a PIC I would like to see a switch for PDT/PST, so I don't have to
> reset the clock twice a year. I would also like to see
> an option for having the clock be self-setting or self-synchronizing by
> adding an inexpensive GPS module.
> I don't need date and I don't need DOW or DOY as I already have other
> clocks and watches that give me that information.
> It might be useful to have a smaller second line that would show me those,
> and show me the time in UTC to keep track of
> what time it is back in the "old country" when I want to listen to Radio
> Denmark on the Internet, but this would add to the
> complexity and the number of solder points.
> And I would like all this to fit in a spare HP 2U half-width rack-mount
> case that I have saved for that purpose. This would
> be a companion to my Thunderbolt GPSDO which is housed in an identical
> case. One option would be to mount the clock
> in the same case as the Thunderbird, and have the second line display your
> choice of GPS signal.
> -- Flemming Larsen, KB6ADS/OZ6OI
> ________________________________
> Fra:Brooke Clarke <brooke at pacific.net>
> Til:Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Sendt:7:12 onsdag den 8. juni 2011
> Emne:Re: [time-nuts] locate 6 digit digital clock
> By using a PIC you can do much more than just tell time, for example
> display the Day of the Week and because the calendar is good back to
> 1800 something you can set the clock back that far and know the DOW. 
> The next step was going to be to install a table of leap seconds so
> that  you could replay any of those events in history.  See:
> http://en.wikipedia.org/wiki/Zeller%27s_congruence
> Have Fun,
> Brooke Clarke
> http://www.PRC68.com
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