Raptor self balancing Unicycle is a one wheeled bike. Forward and backward balancing controlled by the Unicyle, whilst side to side is taken care of by the riders inertia. Have a look at the video…
The Raptor self balancing Unicycle built by Nick Thatcker, who few years back he built a Segway clone.
The Unicycle is controlled by an Arduino UNO, to provide the stability and keep the bike upright.
Can go 90 and 120 minutes on one charge with a top speed of 10 MPH.
source Thatch Industries