Book Image

BeagleBone Robotic Projects - Second Edition

By : Richard Grimmett
Book Image

BeagleBone Robotic Projects - Second Edition

By: Richard Grimmett

Overview of this book

BeagleBone Blue is effectively a small, light, cheap computer in a similar vein to Raspberry Pi and Arduino. It has all of the extensibility of today’s desktop machines, but without the bulk, expense, or noise. This project guide provides step-by-step instructions that enable anyone to use this new, low-cost platform in some fascinating robotics projects. By the time you are finished, your projects will be able to see, speak, listen, detect their surroundings, and move in a variety of amazing ways. The book begins with unpacking and powering up the components. This includes guidance on what to purchase and how to connect it all successfully, and a primer on programming the BeagleBone Blue. You will add additional software functionality available from the open source community, including making the system see using a webcam, hear using a microphone, and speak using a speaker. You will then learn to use the new hardware capability of the BeagleBone Blue to make your robots move, as well as discover how to add sonar sensors to avoid or find objects. Later, you will learn to remotely control your robot through iOS and Android devices. At the end of this book, you will see how to integrate all of these functionalities to work together, before developing the most impressive robotics projects: Drone and Submarine.
Table of Contents (18 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Connecting the BeagleBone Blue to your mobile platform

Now that you have a legged platform and a servo motor controller, you are ready to make your projects walk! Before you begin, you'll need some background on servo motors. Servo motors are somewhat similar to DC motors. However, there is an important difference: while DC motors are generally designed to move in a continuous way, rotating 360 degrees and at a given speed, servos are generally designed to move in a limited set of angles. In other words, in the DC motor world, you generally want your motors to spin with a continuous rotation speed that you control, while in the servo world, you want your motor to move to a specific position that you control.

To make your project walk, you first need to connect the BeagleBone Blue to the four servos. Here is a picture of our two-legged robot and the four different servo connections:

In order to be consistent, let's connect your four servos to the connections marked 0 through 3 on the controller...