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rsz harmonograph How To:  Make a three pendulum rotary harmonograph

harmonograph images.jpg

MacArthur fellow and MIT Media Lab alumnus Karl Sims brings us this great tutorial on how to build your own complex harmonograph (Wikipedia) for making cool…um…”geometric figures?” I’m looking for a 50-cent mathematician’s word (which may or may not exist) for these periodic spirally figures. Can anybody help me out? [Thanks, David!]

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

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