@Crusty...GREAT idea. You could have a curved line of RGB LEDs some distance above the sundial to simulate the sun, clear ones that have a narrow beam. and illuminate them one at a time, changing every 10 minutes or so (this implies 72 LEDs for 12 hours) and use one colour for day and another for night. Wouldn't need any motors, just some electronics to drive the LEDS. Since your LEDs would be fixed you wouldn't need to compensate for the seasons either...
I like your siolution of displaying hours 1-6 and then 7-12 with minutes inbetween.
Another solution might be to have a "rest" position on the left and then hours 1-12 and minutes 1-60 shown as concentric scales. The needle could start off in the "rest" position -- then move to indicate the hour -- then move to indicate the minute -- then return to the rest position...
@HeyJoe: ...On my next iteration Im going to use a linear scale and apply a nonlinear correction factor on my output value.
That's something I might be doing -- alternatively, for some ptojects I might want a non-linear scale that doesn;t match the non-linerarity of the meter. In thsi case I might use a look-up table approach and then interpolate between table values.
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