A model of the famous toy known as a spirograph. A circle of radius r (see blue circle below) is allowed to roll around the inside of a circle of radius R (see black circle below). We assume that the ...

as well as benefiting from fewer ads, loyalty rewards and much more. The Spirograph game was developed by Leeds engineer Denys Fisher in the early 1960s from his home studio in Scholes as part of ...

Master LEGO builder [Yoshihito Isogawa] has been on a roll lately, cranking out a number of robots that make drawings reminiscent of the classic Spirograph toy. For instance, he built an elegant ...