How to make a 3D printed rolling marble clock

by
Mark Frauenfelder
from on (#3Y8HX)
clock.jpg?fit=600%2C400&ssl=1

gocivici made this amazing mechanical clock with a 3D printer and generously shared the plans on Instructables.

FGWNCJ6JK10V1GX.LARGE_.jpg

[via Evil Mad Scientist]

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