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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

Connecting a DC motor using an H-bridge and Arduino


The next step is to add a bit more functionality with a new type of chip, an H-bridge. An H-bridge is a fairly simple device. It basically consists of a set of switches and adds the additional functionality of allowing the direction of the current to be reversed so that the motor can either be run in the forward or the reverse direction.

Let's start this example by building the H-bridge circuit and controlling just one motor. To do this, you'll need an H-bridge. One of the most common is the L293 dual H-bridge chip. This chip will allow you to control the direction of the DC motors. These are available at most electronics stores or online. You'll also need a capacitor; you can use the 1 microfarad capacitor from the previous example, if you'd like. The capacitor limits the fast changes in the signals that are sent to the motor. Once you have your H-bridge, build the following circuit with Arduino and a breadboard:

The following table shows...

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