acknowledgments...xiii foreword...xiv

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1 Contents in Detail acknowledgments...xiii foreword...xiv Introduction... xv Why Build and Learn About Robots?...xvi Why the Raspberry Pi?... xvii What Is in This Book?... xvii Who is This Book For?...xix Where Should You Buy Parts?...xix Let s Get Started!...xx chapter 1: Getting Up and Running... 1 Get Your Hands on a Raspberry Pi... 2 Your First Taste of Pi... 4 What You ll Need... 6 Setting Up Your Raspberry Pi... 8 Installing Your Pi s Operating System on Windows/macos... 8 Plugging In and Wiring Up Your Raspberry Pi...12 Installing Raspbian...14 Configuring Raspbian...15 The Terrific World of the Terminal...17 Touring the Terminal...18 Accessing Your Raspberry Pi from Another Computer...21 What Is Programming? Introducing Python Writing Your First Python Program Summary chapter 2: Electronics Basics What Is Electricity? Resistance Ohm s Law of Electricity Making an LED Blink: Raspberry Pi GPIO Output The Parts List vii Contents in Detail

2 Wiring Up Your LED Programming Your Raspberry Pi to Blink Your LED Running Your Program: Make Your LED Blink Challenge Yourself: Change the Timing Input from a Button: Raspberry Pi GPIO Input Explaining the Parts List Wiring Up Your Button Programming Your Raspberry Pi to Display Input from Your Button Running Your Program: Get Input from Your Button Challenge Yourself: Combine Your Button and LED Programs Summary chapter 3: Building Your Robot Your First Robot What You ll Need...51 Chassis Motors Batteries Voltage Regulator Motor Controller Recommended Tools Assembling Your Robot Making the Chassis Attaching the Motors Stabilizing the Robot Attaching the Batteries Mounting the Raspberry Pi, Breadboard, and Buck Converter Wiring Up Power to the Raspberry Pi Wiring Up the Motors...71 Summary chapter 4: Making Your Robot Move The Parts List Understanding the H-Bridge First Movement...81 Programming Your Robot with a Predefined Route...81 Running Your Program: Make Your Robot Move viii Contents in Detail

3 Making Your Robot Remote-Controlled The Wiimote Wireless Controller Installing and Enabling Bluetooth Programming Remote Control Functionality Running Your Program: Remote-Control Your Robot Varying the Motor Speed Understanding How PWM Works Understanding the Accelerometer Looking at the Data Figuring Out the Remote Movement Control Programming Your Robot for Variable Speed Running Your Program: Remote-Control Your Robot with PWM Challenge Yourself: Refine your Remote-Controlled Robot Summary chapter 5: Avoiding Obstacles Obstacle Detection Using Ultrasonic Sensors for Analog Object Detection Understanding How the HC-SR04 Works Measuring a Short Distance The Parts List Reducing Voltage with Voltage Dividers Wiring Up Your HC-SR Programming Your Raspberry Pi to Read Distance Running Your Program: Measure a Short Distance Make Your Robot Avoid Obstacles Mounting Your HC-SR04 Ultrasonic Sensor Programming Your Robot to Avoid Obstacles Running Your Program: Make Your Robot Avoid Obstacles Challenge Yourself: Improve the Obstacle Avoidance Program Summary ix Contents in Detail

4 chapter 6: Customizing with Lights and Sound Adding NeoPixels to Your Raspberry Pi Robot Introducing NeoPixels and the RGB Color System The Parts List Wiring Up Your NeoPixel Stick Installing the Software Configuring the Library s Example Code Running the Example Code Controlling NeoPixels Using the Wiimote Program Running Your Program: NeoPixels and Wiimote Control Challenge Yourself: Experiment with Color and Pattern Adding a Speaker to Your Raspberry Pi Robot Understanding How 3.5 mm Speakers Work Connecting Your Speaker Adding a Car Horn to the Wiimote Program Installing the Software Playing Sounds from the Terminal Playing Sound Using the Wiimote Program Running Your Program: NeoPixels, Sound Effects, and the Wiimote Control Adding Beeping to the Obstacle Avoidance Program Integrating the Beep Sound into the Obstacle Avoidance Program Running Your Program: Beeping Obstacle Avoidance Challenge Yourself: Add Sound Effects to Your Other Projects Summary chapter 7: Line Following Creating a Track The Theory Behind Line Following Using an IR Sensor to Detect a Line The Parts List Wiring Up Your TCRT5000 Line-Following Sensor Module x Contents in Detail

5 Programming Your Raspberry Pi to Detect a Line Running Your Program: Detect a Line! Make Your Robot Follow a Line Autonomously Wiring Up the Second TCRT5000 Line-Following Sensor Module Mounting Your Sensors Programming Your Robot to Follow a Line Running Your Program: Make Your Robot Follow a Line! Summary chapter 8: Computer Vision: Follow a Colored Ball The Computer Vision Process The Parts List The Target: A Colored Ball The Official Raspberry Pi Camera Module Connecting and Setting Up Your Camera Module Mounting Your Camera Enabling the Camera and VNC, and Setting the Screen Resolution Taking a Test Photo Controlling Your Pi s Desktop Remotely with VNC Installing and Making a Connection with VNC Viewer Taking and Viewing a Photo Using the Raspberry Pi Camera Module Make Your Robot Seek and Follow a Ball Understanding the Theory Behind Colored Object Recognition Installing the Software Identifying the HSV Color of Your Colored Ball Running the HSV Test Program Programming Your Raspberry Pi to Follow a Ball Running Your Program: Make Your Robot Follow a Colored Ball! Summary xi Contents in Detail

6 Next Steps The Raspberry Pi Guy Get in Touch! Other Websites Clubs and Events Books and Publications Raspberry Pi GPIO Diagram Resistor Guide How to Solder What You Need Solder Soldering Iron Stand and Soldering Tip Cleaner Soldering Components Together Preparing to Solder Tinning the Tip Setting Up the Components Soldering the Perfect Joint Summary Run Program on Startup Editing the rc.local File A Practice Example xii Contents in Detail