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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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Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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