The mechanical laser show is a device that projects a pattern by quickly moving a laser. It’s
hand powered, 3d printed, open source, and free to print.
For more information and shots of it in motion, see this video:
Hackaday.io post with more info: https://hackaday.io/project/25447-mechanical-laser-show
Cam profile code: https://github.com/EvanStanford/cams