Mindstorms NXT machine which sorts out 5 different colors using only two motors and the light sensor
Looking to upgrade your inexpensive RC helicopter? Watch this clip.
This clip claims a very inexpensive way to boost your signal by 4X, using twistie ties and tape.
From the author:
Using infrared (IR) light pens and the Wii Remote, it is possible to create very low-cost multi-point interactive whiteboards and multi-point tablet displays. Johnny Chung Lee, Carnegie Mellon University. The software can be downloaded at http://johnnylee.net
This gigantic Tesla Coil is located in Newcastle, OK.
According to the author, this took six and a half hours and eight tries.