Arduino-Based 2-Wheel Balance Bot

Reader Shaun Crampton sent us the specs for the second prototype of his ArduRoller:

• Chassis: laser cut 2.7mm bamboo ply (Ponoko); various M2.5 machine screws from Amazon; Instamorph low-melt-point thermoplastic to fill in the gaps.
• Brains: 1 x Arduino Uno
• Motor driver: 1 x Sparkfun Ardumoto
• Motors: Sparkfun 2 x 24:1 gearmotor
• Wheels: 1 set Sparkfun 70mm — repaired with Instamorph after they cracked around the axle
• Gyro: 1 x ADXRS613 (Sparkfun breakout) mounted at the axis of rotation
• Accelerometer: 1 x ADXL203CE (Sparkfun breakout) mounted at the axis of rotation
• Batteries: 2 x 3.7V Li-poly 850MAh (Sparkfun)

There’s video here, and code and chassis files on GitHub. [Thanks, Shaun!]

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