Joe Freedman's Amazing Cycloid Drawing Machine
1.2M views · 11 years ago · demo · evergreen
A video of Freedman's cycloid drawing machine, a mechanical device that draws spirograph-like curves. HN also shared a laser-cut version of the machine.
HN people submit it as an amazing machine for making cycloid drawings, and link it next to spirograph simulators.
4 comments from Hacker News