Vehicle 2 has two light sensors, one on each side, and two motors, right and left. The more there is of the quality to which the sensor is tuned, the faster the motor goes. Vehicle 2A will spend more time in the places where there is less of the stuff that excites its sensors and will speed up when it is exposed to higher concentrations. If the source of the stuff is directly ahead, the vehicle may hit the source unless it is deflected from its course. If the source is to one side, one of the sensors, the one nearer to the source, is excited more than the other. The corresponding motor will work harder. And as a consequence the vehicle will turn away from the source. Now let us try the other scheme of sensory-motor connections, Vehicle 2B. No change if the source is straight ahead. If it is to one side, however, we notice a difference with respect to Vehicle 2A. Vehicle 2B will turn toward the source and eventually hit it.

Vehicle 3 – Lover and Explorer. Vehicle 3 introduces inhibition between sensors and motors, switching the sign of influence from positive to negative. This will let the motor slow down when the corresponding sensor is activated. Again we can make two variants, one with straight and one with crossed connections.

How to write a RobotC script stimulatibg Braitenberg Vehicles.