(Archive of: http://www.thing-a-day2.com/2008/02/24/day-24-thing-24-mouse-whiskers-touch-sensor/)
Two weekends ago Aidan and I went to radio shack and he was looking at these $9 bug bots which have a sound sensor, two touch sensors (antennae) and 6 legs. He was very interseted in both the walking mechanism and the touch sensor. We decided that we should add one of those to his arduino based mouse (A168).
