Pneumatic walking robot uses vacuum suction cups to traverse almost any indoor surfaces and disinfect them with UV light.
Did you ever want to have a nice LED blink off and on while OpenCV recorded video from your WebCam?
Did you ever want to use another radio band to control your LED from a distance w/ an Xbee by way of push button?
Did you ever want to use a FET for switching your LED on and off?
Did you ever want to know if you were moving while you slept?