Pendulino
A motorized chaotic pendulum that traces its motion with light.
Motion & power
A button starts a motorized rotation, setting the double pendulum in motion. Four inductive coils deliver power to the moving LED without wires constraining the linkages.
Mechanism
An Arduino Nano controls a NEMA-17 stepper motor. Printed linkages and housing, ball bearings, and standard fasteners make up the mechanical assembly.