Lesson 41 · Plotting the ultrasonic sensor

Robotics basics · 6 min · See the playlist on YouTube ↗

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The ultrasonic sensor measures what's in front of it by sending out a sound and waiting for the echo to come back. That's why it's declared with two pins instead of one.

🎯 The challenge of this lesson

Add an LED that only turns on when the distance drops below thirty, multiplying the result of a comparison by one hundred; then change the Delay to one thousand and notice how late the program catches on.

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