Sumobot Jr is open source robot car kit.
original https://github.com/makenai/sumobot-jr

Video Sumobot Jr

Video Sumobot with Raspberry Pi

• Body : SumbotJr 3mm

• BallCaster

• sumobot web daemon
  web app to control Sumobot
  
• sumobot turn
  reft turn <-> stop <-> right turn
  
• sumobot command
  command specify forward, backward or etc
• servo class
  test using Servo class
  
• servo command
  command to specify the rotation direction and speed
  
• servo digitalwrite
  test using using digitalWrite
  
• servo fade
  clockwide <-> stop <-> anticlockwide
  

• Sumobot web
  Web app to control Sumobot
  
• Sumobot Wii
  Sumobot controlled by Wii Remote
  
• Sumobot Scrach
  Sumobot controlled by Scrach
  
• sumobot turn
  reft turn <-> stop <-> right turn
  
• sumobot command
  command specify forward, backward or etc
  
• WiringPi Servo
  test for Continuous Rotation Servo
  

• Parts
• Assembly

http://android.ohwada.jp/archives/6714