Virtual Challenge 5: Motor Control and other Sensors

Challenge 5: Motor Control and Other Sensors

Lesson Objectives:

Learn how to control a motors speed based on a sensors input

Lesson Outcomes:

ALL students will: Be able to control a motors speed based on a the color sensors brightness levels

MOST students will: Be able to control a motors speed based on a the ultrasonic & infrared levels

SOME students may: Be able to control a motors speed based on a the gyro's angle level

Keywords:

Color sensor light intensity: This works by shining a white light at an object and then recording the reflected brightness

Ultrasonic sensor: Measures the distance of a target object by emitting ultrasonic sound waves, and converts the reflected sound into an electrical signal.

Infrared sensor: Measures infrared light radiating from objects in its field of view

Gyro sensor: Measures the robot's rotational motion and changes in its orientation

Introduction:

Try this!

Color Sensor's reflected light = mapped to the speed of motor 1

Main Activities:

Task 1: Mapping Sensors to a Motor

Ultrasonic sensor distance = mapped to the speed of motor 2

Infrared sensor distance = mapped to the speed of motor 3

Gyro rate = mapped to the speed of motor 4

Now you should have 4 sensors and 4 motors. Take a video of all motors running.

Task 2: Where in the world?

Choose one sensor from today. Provide at least 3 sentences explaining where this system could be used in the real world today.

Extended Activity:

Can you apply two sensors to control one motor?

E.g. if the gyro rate was 20 AND ultrasonic distance is 20 - run the motor

Rounding up the Lesson:

As usual, don't forget to do your portfolio! Make sure of the following:
Screencast - not a mobile phone recording your screen
Make sure the video is embedded into your page
Make sure the video is large enough to read the code
Have a supporting sentence explaining your code

Homework:

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