Star Tribune: Along with half-built circuit boards, an electrical schematic drawn on a chalkboard and photos of Albert Einstein taped to the walls, Bill Robbins’ laboratory at the University of Minnesota contains a homemade plastic shoe insert with a wire coming off the heel and a wind tunnel fashioned from Plexiglas, duct-tape and a fan cannibalized from a car radiator. “I don’t have really high-tech equipment in here,” Robbins admitted, in an understatement. Throw in the loose wires and his lab looks like…