Eunicycle
From Wikipedia, the free encyclopedia
A Eunicycle is a computer controlled, partially self-balancing, motorized unicycle invented by Trevor Blackwell. It uses a computer control system similar to the one used by the Segway HT that drives its wheel to balance itself gyroscopically in the front-to-back direction, but still needs to be balanced by the rider from side to side.
The engineering drawings and control software source-code are available from the website.