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PG52’s Lego Spirograph (website is in French) sports four speeds for the board rotation and four for the arms. I love the complicated gearbox that enables the whole operation to run off of a single motor.

John Baichtal

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal nerdage.net