A digital, 3D printed sundial whose precise holes cast a shadow displaying the current time

https://www.youtube.com/watch?v=cCe7m7mhUxY

Julldozer created an amazingly clever digital sundial ("Cadran Solaire Numrique") that precomputes the angle of the sun throughout the day and uses those computations to make hundreds of precise holes calibrated to cast a shadow displaying the present time. (more…)