Usually we need at least 2 motors for steering a mobile robot on a horizontal surface. But what if you can use just one motor?
Several solutions are already tried by various people, including researchers, makers, LEGO designers. In this video it is shown that you can make a very simple one just using cardboard as base material. The movement is hard to control, though.
Performed by Advent Chamber Orchestra. The Advent Chamber Orchestra, a conductorless orchestra, is based in Bolingbrook, Illinois, and usually performs in the Chicago metropolitan area.