Microsoft Connected Car - Center console work
BMW jog dial wired as a USB controller. Arduino/Makey-Makey employed as a controller.
BMW jog dial + old-school optical mouse as a USB controller.
Autonomous robot with stylus for creating large format art. Robot has infrared vision in front and back. Stylus can be programmed to be retracted.
Circular circuit design - Audio waveform clipper, aka: FuzzFace