16-299: TWIP videos.

Tumbller does obstacle course!
Tumbller does face tracking!
Robot in action
Robot in action 2
Battle bots: Tumbller and Lego Gyro Boy fight it out
Modeling the robot in Solidworks

International Videos

Discussion in Italian Motor control in Italian Explanation of motor circuit and code in Italian Explanation of PID in Italian Balancing in Italian
Point the ultrasound! (Spanish)

Generic advice

Self Balancing Robot [Hardware] Tips that will Save your project
Neural Net code, Video 1, Video 2, The author is from CMU

Other TWIP robots

Bluetooth control of similar robot
Similar robot made from parts Later version
Zippy with improved code!
A large number of balancing robot videos