Halo - A Mechanical Wooden Marble Machine

Build your own! Download woodworking plans at Halo is a spring-powered, fully mechanical, wooden marble machine. Give the winder a spin, and step back to watch a group of marbles flow one-by-one down two unique sets of wooden tracks. To aid in the marbles' journey, Halo's marble lift mechanism is based on the physics of eddy currents, allowing a simple magnetic mechanism to silently limit the speed of Halo's lift ring and allow each marble to effortlessly travel up to the top of the tracks at a near-constant speed.