This vehicle, which lightly resembles an ancient car, is equipped with a motor-driven 2 speed gear and a motor-driven steering gear. It starts with first gear and after a while inserts the second. When it bumps into an obstacle tries to avoid it with the following procedure:
Uses three motors (main drive, gear and steer) and two touch sensors (bump and steer position detection).
Suggestion for further developments: it is possible to build a "slope sensor" that makes the car switch to the first gear when the path gets steep.
A particular of the sensor used to know when the steer is centered. Note the bumper too.
Bottom view. From left to right: the differential gear on the wheel axle, the fixed and the shifting axles of the speed gear.
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