A motorized marble machine with a twist.
The motorized lift is modular to allow retrofitting other tracks.
(updated RUN1.stl 9/19/15)
Printed RUN1.stl at .2mm layer height. Others at .3mm layer height.
Motor is a 298:1 Micro Gearmotor from Pololu
Battery pack is Digikey p/n BC4AAW-ND
Switch is Digikey CWI334-ND
Marbles are 11/32" ball bearings