[time-nuts] keeping Arduino timekeeping and clock synced up

[Tom Van Baak]

> So, periodically, one would need to reset both the analog clock AND the 
> Arduino clock to bring them back to proper alignment.
> 
> I suppose that periodically, one could compare "number of ticks sent" 
> with "UTC + EOT offset" and try to compensate (by dropping ticks or 
> adding them).

And then you'd have a GPSDST (GPS disciplined solar time) clock...

While you're at it, add a rotary switch and allow the (JPL) user to select which planet's solar time they want to display. Since there are now only 8 planets you can also do it with a 3-bit configuration switch (now you know the real reason Pluto was demoted).

If your project works ok for the earth clock, the next step is a jaw-dropping array of 8 (9) clocks in a JPL lobby showing the differently ticking solar time for each planet. Use 24h clocks for best results. They can be had from www.clockkit.com, an excellent source of DIY quartz clock parts.

/tvb
www.leapsecond.com