Actually, Russell, there are no electronics involved. I think you got
caught by the same frame of mind that I was (when you hear digital, you
immediatly think electronics :) ).
See the bottom pic at:
http://www.digitalsundial.com/publicdials.html

But, I agree. Brilliant!

Quentin
> I'm putting this in with an EE tag.
>
>         http://www.digitalsundial.com/
>
> Utterly brilliant.
> Much dearer than one might hope.
>
> What we want is a revolving propeller clock or oscillating arm type that is
> solar powered and uses sun position to deduce the time, as this does.
>
> The truly insane could also measure sun angle at midday to auto detect
> latitude

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