Digital Sundial V2

Description:
------------
I was inspired by the Digital Sundial put together by Mojoptix.
I downloaded his design from Thingiverse and learned more about
the design by watching his podcast at the following site:
http://www.mojoptix.com/fr/2015/10/12/ep-001-cadran-solaire-numerique
The engineer in me was captivated. I had to try and 3D print it.
However, my 3D printer struggled to print this design well ...
especially the minute-tens digit. This got me thinking about
changing the design to make it more 3D printer friendly.

As I was coming up with my design, I did some additional research
and found another digital sundial design that was along the lines
of what I was thinking.
http://digitalsundial.com/
They improved the non-linearity of the grating pattern by
using the index of refraction of a piece of plexiglass
between two masks. This was a super-slick solution however this
seemed impractical for what I wanted so I just decided to live
with the inaccuracy of not having thi