Motor Drive for Tulio Marble Machine #3

A motor drive for Tulio's most excellent Marble Machine #3. https://www.thingiverse.com/thing:1385312

https://www.youtube.com/watch?v=xeIdyHA-Xks

Just take of the top finger spinner and this piece drops in. Drop the finger spinner back in and you are back to manual operation.

Software supports continuous and one-shot operation. (software upload coming soon...)

Thanks Tulio, you are a true artist!

Hardware:
28BYJ-48 stepper motor
ULN2003 stepper controller breakout board
This i