The RidgeWarrior II is a robot that was developed in a five part tutorial series in SERVO Magazine. This robot is based on the IntelliBrain-Bot kit plus a pair of Sharp range sensors and a CMUcam. Though the tutorial uses a specific robot, most of the software is designed to be reusable, so it can be used to build other Java-programmed robots.
This is an easy to build robot that requires only the IntelliBrain robotics controller main board. It uses the Mark III robot chassis. The Mark III kit, the servo motors, the wheels and the sensors are available from Junun.org.
Who says building a balancing robot has to be expensive and difficult? With just two inexpensive infrared photoreflectors, an IntelliBrain controller, and some Lego® bricks you can build and program your own balancing robot before you know it!