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Arduino Robotic Projects

You're reading from   Arduino Robotic Projects Build awesome and complex robots with the power of Arduino.

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781783989829
Length 240 pages
Edition Edition
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Author (1):
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Richard Grimmett Richard Grimmett
Author Profile Icon Richard Grimmett
Richard Grimmett
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Table of Contents (21) Chapters Close

Arduino Robotic Projects
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Powering on Arduino FREE CHAPTER 2. Getting Started with the Arduino IDE 3. Simple Programming Concepts Using the Arduino IDE 4. Accessing the GPIO Pins 5. Working with Displays 6. Controlling DC Motors 7. Controlling Servos with Arduino 8. Avoiding Obstacles Using Sensors 9. Even More Useful Sensors 10. Going Truly Mobile – the Remote Control of Your Robot 11. Using a GPS Device with Arduino 12. Taking Your Robot to Sea 13. Robots That Can Fly 14. Small Projects with Arduino Index

Accessing the IR sensor from the Arduino IDE


Now, bring up the Arduino IDE. Here is a simple sketch that provides access to the sensor and returns the distance to the object via the serial link:

The sketch is quite simple. The three global variables at the top set the input pin to A3 and provide a storage location for the input value and distance. The setup() function simply sets the serial port baud rate to 9600 and prints out a single line to the serial port.

In the loop() function, you first get the value from the A3 input port. The next step is to convert it to a distance based on the voltage. To do this, you need to use the voltage to distance chart for the device; in this case, it is similar to the following diagram:

There are two parts to the curve. The first is the distance up to about 15 centimeters and then the distance from 15 centimeters to 150 centimeters. This simple example ignores distances closer than 15 centimeters, and models the distance from 15 centimeters and out as...

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