MIT student builds an electric self-balancing unicycle

A rather fantastic DIY project to end the year: MIT student Stephan Boyer has built his own self-balancing electrical unicycle to roll with speed around the campus.

Called the "Bullet", the custom steel body holds two 7Ah 12-volt batteries, a 450-watt electric motor and an ATmega328 chip.  This gives the solowheel transport a range of 5 miles with a max speed of 15mph.  At that speed, it's not going to replace your daily commute; but it makes for the perfect round-campus mode of transportation, as the students in the video demonstration.