Lesson: 20L ESR Detecting Obstacles

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Objectives: 

In this lesson, students learn how to use the Ultrasonic Sensors to detect obstacles and then wait until they are removed before proceeding.

1) The videos in this lesson use the PC version of the EV3 programming software.  If you need a refresh on this, the video below explains the difference between what you will see in these videos and how to do the same steps with Riley and your Chromebook EV3 Programming software. If you remember this, you can skip down to Step 2):

2) Watch this video to learn about the difficulties of having a robot stop when it sees an obstacle:

3) Start the video again and pause it so you can create the same program for Riley. 

4) Now watch this video to learn how to overcome this problem:

5) Start the video again and pause it so you can create the same program for Riley. 

6) Answer these questions:

Why did the attempt in the first video fail?
What changed in the second video to make this work?

 

 

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