double pendulum

This is a double pendulum with a radius of 2 ft. I mounted it on a 4 ft diameter circle of plywood painted with glow in the dark paint. The short arm holds a UV laser pointer on the end of it that traces the path the pendulum takes on the glow in the dark paint.

Fun fact:
This was actually the reason I started this thingiverse account anyway, it
Is nice to see a project come together.