This is a project I did to try out a stepper motor driver board and to get some practice with Fusion 360. I started with something similar or identical to this design from Thingiverse, scaled it down and broke it into pieces. I made a cavity for the stepper motor and some clips for the Arduino and 9V battery.
Rotating the knob increases the speed of the stepper motor in the direction the knob is turned. The result is the wolf’s head spins 360 degrees, similar to The Exorcist but less creepy.
Parts List:
Breadboard Power Supply Module
28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board
Arduino Pro Micro
KY-040 Rotary Encoder Module
