I recently made a rough, 2-pendulum harmonograph for light painting physiograms. The harmonograph has multiple positions for placing LEDs so I tried making physiograms using 1 or 2 LEDs. Check out the gallery of physiogram patterns I made with below.

My plan is to create a video to show you haw I made the harmonograph and how the physiograms were created with it so come back to Light Paint Hack soon to get more detail.