Laser triggered waterbomb trap

Back at school I built a little trap in order to fool some other pupils. At first I took apart an old CD-drive and removed the laser-moving unit: the laser unit The laser unit will be used as our trigger mechanism. Just solder a connection to the motor and add a needle to the moving part. The needle will move […]

Angular momentum 3d stabilizer

Some time ago I wanted to build a cube that could seemingly defy the law of physics and balance on its edges or corners. To achieve this aim I decided to use spinning weights which would create a large angular momentum. So if the angular momentum gets bigger than the gravitational force, the cube would remain in its position even […]