Raspberry Pi Projects For Dummies E-Book

Mike Cook

• Herausgeber: John Wiley & Sons
• Kategorie: Wissenschaft und neue Technologien
• Sprache: Englisch

Seitenzahl: 619

Veröffentlichungsjahr: 2015

Beschreibung

Join the Raspberry revolution with these fun and easy Pi projects The Raspberry Pi has opened up a whole new world of innovation for everyone from hardware hackers and programmers to students, hobbyists, engineers, and beyond. Featuring a variety of hands-on projects, this easy-to-understand guide walks you through every step of the design process and will have you creating like a Raspberry Pi pro in no time. You'll learn how to prepare your workspace, assemble the necessary tools, work with test equipment, and find your way around the Raspberry Pi before moving on to a series of fun, lively projects that brings some power to your plain ol' Pi. * Introduces Raspberry Pi basics and gives you a solid understanding of all the essentials you'll need to take on your first project * Includes an array of fun and useful projects that show you how to do everything from creating a magic light wand to enhancing your designs with Lego sensors, installing and writing games for the RISC OS, building a transistor tester, and more * Provides an easy, hands-on approach to learning more about electronics, programming, and interaction design for Makers and innovators of all ages Bring the power of Pi to your next cool creation with Raspberry Pi Projects For Dummies!

Leseprobe

Raspberry Pi® Projects For Dummies®

Published by: John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, www.wiley.com

Copyright © 2015 by John Wiley & Sons, Inc., Hoboken, New Jersey

Published simultaneously in Canada

No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the Publisher. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, [phone], fax [phone], or online at http://www.wiley.com/go/permissions.

Trademarks: Wiley, For Dummies, the Dummies Man logo, Dummies.com, Making Everything Easier, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc., and may not be used without written permission. Raspberry Pi is a registered trademark of the Raspberry Pi Foundation. All other trademarks are the property of their respective owners. John Wiley & Sons, Inc., is not associated with any product or vendor mentioned in this book.

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Library of Congress Control Number: 2015942453

ISBN 978-1-118-76669-9 (pbk); ISBN 978-1-118-76672-9 (ebk); ISBN 978-1-118-76671-2 (ebk)

Raspberry Pi® Projects For Dummies®

Visit www.dummies.com/cheatsheet/raspberrypiprojects to view this book's cheat sheet.

Table of Contents

Cover

Introduction

About This Book

Foolish Assumptions

Icons Used in This Book

Beyond the Book

Where to Go from Here

Part I: Getting Started with Raspberry Pi Projects

Chapter 1: Getting to Know the Raspberry Pi

Getting a Raspberry Pi

Discovering What You Can and Can’t Do with a Raspberry Pi

Getting Familiar with Your Raspberry Pi

Selecting Your Accessories

Setting Up Your Operating System

Flashing Your SD Card

Connecting Your Hardware

Setting Up with Raspi-config

Starting Up the Desktop Environment

Troubleshooting Your Raspberry Pi

Chapter 2: Setting Up Your Tools and Workbench

Getting Ready to Build Your Projects

Assembling Your Tools

Using Your Tools Safely and Effectively

Getting Ready to Build Raspberry Pi LEGO Projects

Chapter 3: Focusing on Technique

Getting Around Your Raspberry Pi

Using the Command-Line Interface

Programming Like a Pro

Chapter 4: The Raspberry Family

In the Beginning: Looking at the Evolution of the Raspberry Pi

Deciding Which Raspberry Pi to Buy

Figuring Out Which Raspberry Pi You Have

Part II: Working with LEDs and Switches

Chapter 5: The Sauce Bottle Game

The Game

The Software

Taking It Farther

Chapter 6: Stomp!

Getting Acquainted with the LED

Stomp 1

Stomp 2

Chapter 7: The Light Fantastic

Introducing the Light Fantastic

The Circuit

Construction

Bringing It All to Life

Chapter 8: Games for the Light Fantastic

Treasure Hunt

Sliding Block Puzzle

Color Match

Lights Out

Exploring a World of Possibilities

Part III: Developing Advanced Interfaces

Chapter 9: Advanced Interfaces

Converting Analog to Digital

Introducing the Analog-to-Digital Conversion Methods

Building an Analog-to-Digital Converter

Using a Potentiometer to Control the Breakdown Game

Creating an Analog Temperature Sensor

Interfacing with an Analog-to-Digital Microchip

Chapter 10: Raspberry Pi in the Sky

Understanding the Cloud

Storing Data in Google Docs from Your Raspberry Pi

Creating a Dashboard and Temperature Alerts Using PrivateEyePi

Creating a Database Logger

Chapter 11: Webcam and Computer Vision

Setting Up the Webcam or Raspberry Pi Camera Module

Understanding Images

Creating an Image File

Detecting Motion with a Webcam

Working with Image Recognition

Interpreting Color

Building a Connect Four Game Using Computer Vision

Chapter 12: The Raspberry Jazz Glitter Trio

Meeting the Gang

Testing the Webcam

Hacking the Glitter Lamp

Letting the Band Play

Part IV: Making the Raspberry Pi Your LEGO’s Magic Brick

Chapter 13: The Pi Meets LEGO

Exploring the MINDSTORMS Range

Creating a Tug-of-War LEGO Robot

Going on from Here

Chapter 14: The LEGO Dice Game

Introducing the Dice Game

Understanding the Game Theory

Detecting Dice

Looking at the Playing Mechanism

Writing the Code

Customizing the Code

Chapter 15: LEGO Direct

Creating a Reset Button for the Raspberry Pi

Making Batteries Last Longer

Using Connectors and Cables to Control the LEGO Motors and Sensors

Reading and Commanding

Rolling Your Own Motor Control

Listening to Sensors

Part V: Exploring RISC OS

Chapter 16: Introducing RISC OS

Knowing What Makes RISC OS Unique

Preparing for Action: Getting RISC OS

All Systems Go: Starting Up RISC OS

Handling Graphics with !Paint and !Draw

Connecting to the Outside World

Identifying the Resources That Are Already Installed

Chapter 17: RISC OS Coding

In the Beginning Was BASIC

Hello World

The Insult Generator

Understanding Full Desktop Applications

Working with Graphics in RISC OS

Chapter 18: Transistor Tester

Getting Acquainted with Transistors

Configuring Transistors

Designing the Circuit

Constructing the Circuit

Writing the Software

Chapter 19: The General-Purpose Input/Output Port in RISC OS

Using the GPIO Pins in RISC OS

Getting an LED to Blink

Mixing Languages

Part IV: The Part of Tens

Chapter 20: Ten Great LEGO Pi Projects

Panobot

MATLAB and Simulink

Raspberry Pi LEGO Case

Book Reader

A Stop-Motion LEGO Movie

SriShooter

browserBot

BrickPi Remote Sentry Cannon

LEGO Digital Clock

The Original LEGO MINDSTORMS

Chapter 21: Ten Suppliers of Components and Tools

Farnell/Newark

RS Components

Rapid Electronics

Mouser Electronics

Digi-Key

Proxxon

Adafruit

SparkFun

Electronic Goldmine

E.M.A. Model Supplies

About the Authors

Cheat Sheet

Advertisement Page

Connect with Dummies

End User License Agreement

Guide

Cover

Table of Contents

Begin Reading

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Introduction

Raspberry Pi Projects For Dummies is designed for people who are looking for something exciting to do with the Raspberry Pi. This book contains projects to amaze and inspire you! It takes you into a world of switches, lights, motors, home automation, and computer vision. It not only covers the theory behind what you’re doing, but also gives you examples of putting that theory into practice, so you can learn to work on your own projects and not just blindly follow a list of instructions.

Sure, we could just give you a list of steps to follow. But we believe that you should try to understand what you’re doing and why you’re doing it, and that’s what this book is all about. With this book as a resource, we encourage you to put your own stamp on projects, which is why many projects in this book aren’t just cut-and-dried lists of things to do, but suggestions about how you can customize the projects and make them your own.

About This Book

The projects in this book all make use of the computer language Python 2. This book shows you how to use a wide variety of input and output devices, from a simple switch to a webcam. You can explore LEDs and multicolored LEDs, learn about a keypad matrix and see how they can be integrated to become part of your code so you can make these devices do what you want. Reach out with your Raspberry Pi and become part of the cloud or build your own web server. This book shows you how.

The Raspberry Pi can interface with other electronic devices, and in this book we show you how to interact with LEGO’s latest robotic MINDSTORMS set, the EV3. You can send messages into the LEGO system or do your own thing and control the MINDSTORMS peripherals directly from the Raspberry Pi. Not only do we show you how these two systems interact, but we also show you some projects you can make using the Raspberry Pi and MINDSTORMS set together.

Linux is the staple operating system used in the Raspberry Pi world. However, there is a major alternative operating system you can run for just the price of another very small SD card, RISC OS. RISC OS is a mature, well-honed operating system, designed from the ground up to run on ARM chips, and as such, it’s fast and compact. This book shows you how you can explore the RISC OS and gives you a glimpse of another world.

A few final notes about the book: Sidebars (text in gray boxes) and Technical Stuff paragraphs are skippable. Finally, within this book, you may note that some web addresses break across two lines of text. If you’re reading this book in print and want to visit one of these web pages, simply key in the web address exactly as it’s noted in the text, pretending as though the line break doesn’t exist. If you’re reading this as an e-book, you’ve got it easy — just click the web address to be taken directly to the web page.

Foolish Assumptions

In writing this book, we made a few assumptions about you:

You have a Raspberry Pi.

You could certainly read this book without a Raspberry Pi, but you won’t get much out of it unless you have a Raspberry Pi to play with.

You have a computer other than the Raspberry Pi.

You need a computer to set up the Raspberry Pi.

Note:

We provide instructions on how to set up your Pi, but this information isn’t the main thrust of the book. If you need more information on setting up your Raspberry Pi, a good companion book to this one is

Raspberry Pi For Dummies,

by Sean McManus and Mike Cook (Wiley), which covers in much more detail your first steps with this remarkable machine.

Your Raspberry Pi has some connection to the Internet.

It may not be connected all the time, but you’re at least able to connect it for setting up the libraries you need to install.

You don’t mind voyaging into less charted waters and you have an open mind on what constitutes computing and operating systems.

You’re eager to begin exploring the world of physical computing.

Physical computing takes a fresh look at inputs and outputs to a computer. The computer produces physical outputs — signals that make lights flash, sounds play, or robots move. Inputs are more than just typing — they include everything from simple push buttons to color sensors to webcams.

You have access to some basic hand tools, like a small saw and drill along with a soldering iron.

If you don’t have these tools on hand, we assume you have the money to buy them — or you have a friend or family member whose toolkit you can raid!

You don’t mind spending some money on the components you need to make your projects.

Most of these components aren’t very expensive, but you’ll need to buy them (and we recommend sources in this book).

Icons Used in This Book

In this book, we use a handful of icons (little pictures in the margins) to draw your attention to key pieces of information. Here’s what those icons mean:

When we give you an especially useful bit of information — something that can make your life with the Raspberry Pi easier or help you do something faster — we mark it with the Tip icon.

You don’t need to commit this book to memory — it’s a resource for you to turn to whenever you need it. But every once in a while, we tell you something so important that you’ll want to remember it. When we do, we mark it with the Remember icon.

What can we say? We’re geeks. And as such, we sometimes get a little technical, telling you more than you really need to know to get the job done. When we veer into the technical, we mark that text with the Technical Stuff icon. If you’re short on time, you can skip anything marked with this icon without missing anything critical to the task at hand.

You’re bound to come across some pitfalls on your journey with the Raspberry Pi. We’ve walked this road before, so think of the Warning icon as orange cones in the road, helping you steer clear of those tire-destroying potholes or open manhole covers.

Beyond the Book

In addition to the material in the print or e-book you’re reading right now, this product also comes with some access-anywhere goodies on the web. Check out the free Cheat Sheet at www.dummies.com/cheatsheet/raspberrypiprojects for information on connecting the Arduino and the Raspberry Pi, GPIO pin alternate functions, and powering other devices from the Raspberry Pi.

Also, at www.dummies.com/extras/raspberrypiprojects, you can find free bonus articles on topics like contact bounce and facial recognition.

Finally, throughout the book, we mention files that you can download from the book’s companion website, www.dummies.com/go/raspberrypiprojects.

Where to Go from Here

If you’re a beginner, you can’t do better than starting at Chapter 1 and making sure you have your Raspberry Pi and your workspace set up. Even if you’re experienced, it’s worth reading the early chapters to pick up hints we’ve gathered from our extensive experience. If you’re champing at the bit to start playing with your Pi, feel free to dive into the parts of the book that interest you most!

Part I

Getting Started with Raspberry Pi Projects

For Dummies can help you get started with lots of subjects. Visit www.dummies.com to learn more and do more with For Dummies.

In this part …

Learn about your Raspberry Pi.

Set up the hardware and operating system and your project-building workspace.

Learn construction techniques.

Understand the basics of programming.

Install language extensions.

Discover the Raspberry Pi family of computers.

Chapter 1

Getting to Know the Raspberry Pi

In This Chapter

Getting a Raspberry Pi

Finding out what’s possible with your Raspberry Pi

Connecting your Raspberry Pi

Setting up your operating system

Troubleshooting any problems

You probably wouldn’t have picked up this book if you hadn’t already heard about the amazing, low-cost computer for everyone, the Raspberry Pi. Besides being inexpensive, what’s made the Raspberry Pi so appealing is that it’s pretty easy to use. You can even change it to do things its designers never dreamed of. Unlike most consumer electronics, tablets, and desktop computers, the Raspberry Pi is designed to let you investigate how it works and change how it operates by writing your own software programs.

This is all possible because the Raspberry Pi uses an inexpensive but powerful processor and a free operating system, which is based upon the popular Linux platform. In this chapter, we take a look at what you need to get going and show you how to set it up.

We also tell you where to get a Raspberry Pi and the accessories you need to run it. We explain how to set up the operating system, how to connect the hardware, and what to do if you run into any problems along the way. Before long, you’ll be able to make your Raspberry Pi say, “Hello, world!”

Getting a Raspberry Pi

If you’re interested in building projects with a Raspberry Pi, you probably already have one. But if you don’t yet have your own Raspberry Pi, this is the section for you! You’ll be glad to know that there are a few places you can pick one up quickly and cheaply.

The Raspberry Pi comes in several versions: Model A is shown in Figure 1-1, and Model B is shown in Figure 1-2. There are other versions of the Raspberry Pi, though — Chapter 4 has a full rundown. The Model A and Model B use the same kind of processor, but the Model A is cheaper and uses less power; it has a single USB port and connections for your screen and audio. Model B has everything Model A has, plus an additional USB port and an Ethernet port for connecting to a network, so it costs a little more. For the projects in this book, you’ll want to get a Model B.