The "holo clock" design by ekaggrat is at http://www.thingiverse.com/thing:570797
I made a motor gear that fits the axle of the 28BYJ-48 5V stepper motor. In my case it was a press fit, so the M3 grub screw may be optional. I also modified the motor mount to allow for the motor bearing collar.
Currently, this is a design in progress, and I have not made a final build yet. The 28BYJ-48 stepper also needs a modified solution for the electronics, so it is not compatible with the solution from ekaggrat.
1 x motor_gear_28byj48 1 x motor_plate2_28byj48 1 x frame_2_n 1 x frame_3_n 1 x frame_4_n 1 x big_gear_2 1 x big_gear_3 2 x big_ring 4 x s1 1? x s2 4 x p1 2? x roller_1 2? x roller_2
4 x M3 x 45mm socket head screw 2 x M3 x 25mm socket head screw 2 x M3 x 6mm socket head screw (for motor mount) 1 x M3 x 6mm grub screw (for motor axle, optional) 2 x tube 4.5mm OD x 3.5mm ID x 12mm length 4 x tube 4.5mm OD x 3.5mm ID x 8.5mm length 2 x tube 4.5mm OD x 3.5mm ID x 6.5mm length 1 x 28BYJ-48 stepper motor 5V
"Holo clock" parts for 28BYJ-48 geared stepper motor by egil is licensed under the Creative Commons - Attribution - Share Alike license.