Spirographs can make some pretty groovy designs on paper, but what if you want to ... a quick proof-of-concept using an actual plastic Spirograph toy to make sure it isn’t a totally unworkable ...

Wikipedia describes Spirograph as a “geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids.” While that all ...

At first glance the monicker “spirograph” seems wrong, because where are the gears? However, [Yoshihito] has them stashed underneath the sheet of paper, with magnets controlling the pens.