There is an analog digital sundial.
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"Digital Sundial
"This sundial, which displays the true solar time digitally, was only developed and patented in 1994 by Werner Krotz-Vogel and Daniel Scharstein. No other sundial can be read as easily and clearly.
"The sunlight falls at an angle that depends on the time, first through a periodic array of slits and then through a second array at a suitable distance. There, it only lights up the slits that belong to a single number at any given moment."
And there's 3d printed models, where holes in the Gnomon spell out the digits.
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Thomas Prufer