Make: Volume 77

RECOGNIZING COLOR

ARRANGEMENT

Generally, a machine that solves Rubikʼs Cube

with robot arms uses cameras or color sensors.

I came up with the idea of using rotary position

sensors. I programmed the microcontroller

so that the rotary position sensor would detect

when the face was turned by hands and the color

arrangement data in the memory would change.

The Self-Solving Rubikʼs Cube does this all the

time, so the color arrangement data in memory

always matches the actual color arrangement.

The idea of using rotary position sensors was

good because there was no need to add new

sensors —but it has the limitation that the colors

must be aligned