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Tracked Vehicle Robot Controlled by Raspberry Pi (Complete Video Below)

Cheap Toy From Frys. Cost 5 bucks. Assembly took about 15 minutes.
Manual Switch on/off, no autonomous function, no remote controls & no turning
Removed Switch and Battery case, Replacing with housing/supports to hold:
  1. Larger Battery Pack (4x AA) $2
  2. Half-Size Breadboard $1.50
  3. L293D Motor Controller Chip $2.50
  4. Raspberry Pi Model B in Case $45
  5. A bunch of wires, zipties and superglue
    1. Final Video