The OddBots Championship

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[attachment=0:7s95i8i5]Poison Ivy.png[/attachment:7s95i8i5]

The hemispheres are attached to the bar so spin with it. When the giant servo/cam things are in the centre position the robot goes nowhere. By raising and lowering each side of the robot the contact angle of the hemisphere and the ground changes driving the robot.

In this picture raise left and lower right to go forwards, the opposite to go backwards, Raise both to turn right and the opposite to turn left.