Steering with two motors

If we move one motor and not the other, the robot turns toward the wheel that isn’t moving. For example, look at the following diagram:

Figure 5.4 – Steering a robot with motors

Figure 5.4 shows two turning robots. There is a forward arrow above the left wheel in the first panel, showing the wheel is driving forward. The right wheel is stopped. A transparent arrow superimposed on this shows the turn direction and that this turn pivots on the right wheel. The right robot shows an opposite turn. A robot can turn backward in the same way by reversing a single motor instead.

As we will do more with motors, we’ll extend robot.py so that we can stop them all. Add this code at the end of robot.py:

def stop():
    motor_A1.value = False
    motor_A2.value = False
    motor_B1.value = False
    motor_B2.value = False

Ensure you copy...