Lesson 51 · The motor and the ultrasonic sensor

Intermediate robotics · 6 min · See the playlist on YouTube ↗

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The number is no longer set by a person or by chance—it's set by a sensor. This is a change in kind, not in degree: the program reacts to the world.

🎯 The challenge of this lesson

Put the reading into a Map block that goes from forty to one hundred and you'll see the motor never fully stops; then use an If to stop it dead below twenty, and compare the two ways of braking.

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