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Learn to easily build gadgets, gizmos, robots, and more using Arduino

Written by Arduino expert Jeremy Blum, this unique book uses the popular Arduino microcontroller platform as an instrument to teach you about topics in electrical engineering, programming, and human-computer interaction. Whether you're a budding hobbyist or an engineer, you'll benefit from the perfectly paced lessons that walk you through useful, artistic, and educational exercises that gradually get more advanced. In addition to specific projects, the book shares best practices in programming and design that you can apply to your own projects. Code snippets and schematics will serve as a useful reference for future projects even after you've mastered all the topics in the book.
Includes a number of projects that utilize different capabilities of the Arduino, while interfacing with external hardware
Features chapters that build upon each other, tying in concepts from previous chapters to illustrate new ones
Includes aspects that are accompanied by video tutorials and other multimedia content
Covers electrical engineering and programming concepts, interfacing with the world through analog and digital sensors, communicating with a computer and other devices, and internet connectivity
Explains how to combine smaller topics into more complex projects
Shares downloadable materials and source code for everything covered in the book
Projects compatible with many official Arduino boards including Arduino Uno; Arduino Leonardo; Arduino Mega 2560; Arduino Due; Arduino Nano; Arduino Mega ADK; LilyPad Arduino and may work with Arduino-compatible boards such as Freeduino and new third party certified boards such as the Intel Galileo

Exploring Arduino takes you on an adventure and provides you with exclusive access to materials not found anywhere else!

Exploring Arduino: Tools and Techniques for Engineering Wizardry. With Downloads

Introduction xix

Part I Arduino Engineering Basics 1

Chapter 1 Getting Up and Blinking with the Arduino 3

Exploring the Arduino Ecosystem 4

Arduino Functionality 4

Atmel Microcontroller 6

Programming Interfaces 6

General I/O and ADCs 7

Power Supplies 7

Arduino Boards 8

Creating Your First Program 13

Downloading and Installing the Arduino IDE 13

Running the IDE and Connecting to the Arduino 14

Breaking Down Your First Program 16

Summary 18

Chapter 2 Digital Inputs, Outputs, and Pulse-Width Modulation 19

Digital Outputs 20

Wiring Up an LED and Using Breadboards 20

Working with Breadboards 21

Wiring LEDs 22

Programming Digital Outputs 24

Using For Loops 25

Pulse-Width Modulation with analogWrite() 27

Reading Digital Inputs 29

Reading Digital Inputs with Pulldown Resistors 29

Working with "Bouncy" Buttons 32
Building a Controllable RGB LED Nightlight 35

Summary 39

Chapter 3 Reading Analog Sensors 41

Understanding Analog and Digital Signals 42

Comparing Analog and Digital Signals 43

Converting an Analog Signal to a Digital One 44

Reading Analog Sensors with the Arduino: analogRead() 45

Reading a Potentiometer 45

Using Analog Sensors 50

Working with Analog Sensors to Sense Temperature 52

Using Variable Resistors to Make Your Own Analog Sensors 54

Using Resistive Voltage Dividers 55

Using Analog Inputs to Control Analog Outputs 56

Summary 59

Part II Controlling Your Environment 61

Chapter 4 Using Transistors and Driving Motors 63

Driving DC Motors 65

Handling High-Current Inductive Loads 65

Using Transistors as Switches 66

Using Protection Diodes 67

Using a Secondary Power Source 68

Wiring the Motor 68

Controlling Motor Speed with PWM 70

Using an H-Bridge to Control DC Motor Direction 72

Building an H-bridge Circuit 73

Operating an H-bridge Circuit 76

Driving Servo Motors 80

Understanding the Difference Between Continuous Rotation and Standard Servos 80

Understanding Servo Control 80

Controlling a Servo 85

Building a Sweeping Distance Sensor 86

Summary 90

Chapter 5 Making Sounds 91

Understanding How Speakers Work 92

The Properties of Sound 92

How a Speaker Produces Sound 94

Using tone() to Make Sounds 95

Including a Definition File 95

Wiring the Speaker 96

Making Sound Sequences 99

Using Arrays 99

Making Note and Duration Arrays 100

Completing the Program 101

Understanding the Limitations of the tone() Function 102

Building a Micro Piano 102

Summary 105

Chapter 6 USB and Serial Communication 107

Understanding the Arduino's Serial Communication Capabilities 108

Arduino Boards with an Internal or External FTDI USB-to-Serial Converter 110

Arduino Boards with a Secondary USB-Capable ATMega MCU Emulating a Serial Converter 112

Arduino Boards with a Single USB-Capable MCU 114

Arduino Boards with USB-Host Capabilities 114

Listening to the Arduino 115

Using print Statements 115

Using Special Characters 117

Changing Data Type Representations 119

Talking to the Arduino 119

Reading Information from a Computer or Other Serial Device 120

Telling the Arduino to Echo Incoming Data 120

Understanding the Differences Between Chars and Ints 121

Sending Single Characters to Control an LED 122

Sending Lists of Values to Control an RGB LED 125

Talking to a Desktop App 127

Talking to Processing 127

Installing Processing 128

Controlling a Processing Sketch from Your Arduino 129

Sending Data from Processing to Your Arduino 132

Learning Special Tricks with the Arduino Leonardo (and Other 32U4-Based Arduinos) 134

Emulating a Keyboard 135

Typing Data into the Computer 135

Commanding Your Computer to Do Your Bidding 139

Emulating a Mouse 140

Summary 144

Chapter 7 Shift Registers 145

Understanding Shift Registers 146

Sending Parallel and Serial Data 147

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