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- Herausgeber: Packt Publishing
- Kategorie: Fachliteratur
- Sprache: Englisch
This book is for kids who wish to develop games and applications using the Raspberry Pi. No prior experience in programming is necessary; you need only a Raspberry Pi and the required peripherals.
Das E-Book können Sie in Legimi-Apps oder einer beliebigen App lesen, die das folgende Format unterstützen:
Seitenzahl: 167
Veröffentlichungsjahr: 2015
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Table of Contents
Raspberry Pi Projects for Kids Second Edition
Raspberry Pi Projects for Kids Second Edition
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: March 2014
Second edition: April 2015
Production reference: 1240415
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78528-152-5
www.packtpub.com
Credits
Author
Daniel Bates
Reviewers
Ed Baker
Colin Deady
Ian McAlpine
Commissioning Editor
Priya Singh
Acquisition Editors
Harsha Bharwani
Sonali Vernekar
Content Development Editor
Nikhil Potdukhe
Technical Editor
Rohith Rajan
Copy Editors
Sonia Cheema
Merilyn Periera
Project Coordinator
Akash Poojary
Proofreaders
Simran Bhogal
Safis Editing
Indexer
Tejal Soni
Graphics
Sheetal Aute
Production Coordinator
Arvindkumar Gupta
Cover Work
Arvindkumar Gupta
About the Author
Daniel Bates is a computer science researcher at the University of Cambridge. His day job involves inventing designs for future mobile phone processors and when he gets home, he likes playing games or working on one of his coding projects (or both!). Daniel has been a volunteer for the Raspberry Pi Foundation since 2011 and is enthusiastic about introducing new people to computing. He has previously written Instant Minecraft: Pi Edition Coding How-to and Raspberry Pi Projects for Kids (First Edition), both published by Packt Publishing.
About the Reviewers
Ed Baker graduated with a BSc in physics from Imperial College, London, in 2007 and somehow ended up working in the Entomology Department of the Natural History Museum shortly after. His work focuses on how technology, both hardware and software, can improve the way research is performed, from field data collection to final publication. Outside the technology world, he is a specialist on stick insects, cockroaches, and grasshoppers.
Recently, his work has focused on automated acoustic and environmental monitoring, protocols for sensor networks, and starting the biodiversity technology company http://www.infocology.co.uk.
Ed's first book, provisionally titled Arduino for Biologists, will be published in 2015 with Pelagic Publishing.
I would like to thank Philippa for believing that the writing and 'tinkering' would bring reward in the end.
Colin Deady's career in IT started in the late 1990s, when he discovered software testing ("they want me to break it?"), having previously fallen in love with computers when his parents brought him and his brother a ZX81 and ZX Spectrum+ in the 1980s and later an Amiga 1200 in the early 1990s. With over 15 years of experience in testing, he works as a Technical Test Manager, emphasizing the benefits of test automation and extolling the virtues of agile using Kanban and Behavior-Driven Development to great effect: define behaviors, then test early, test often. He combines BDD with a fix early, fix often approach that he terms Zero Known Defects.
Colin was one of the technical reviewers for Tim Cox's excellent Raspberry Pi Cookbook for Python Programmers, by Packt Publishing, and has written several articles for The MagPi, a community magazine for the Raspberry Pi. He has also reviewed and edited many more, building up extensive knowledge on this tiny platform.
He currently runs a blog related to all things Raspberry Pi, which can be found at www.rasptut.co.uk.
Ian McAlpine was first introduced to computers when he used his school's Research Machines RML 380Z and his physics teacher's Compukit UK101. This was followed by a Sinclair ZX81 and then a BBC Micro Model A, which he still has to this day. The interest he has in computers resulted in an MEng degree in electronic systems engineering from Aston University and an MSc in information technology from the University of Liverpool. Ian is currently a product expert in the Business Intelligence and Analytics Competence Center at SAP Labs in Vancouver, Canada.
The introduction of the Raspberry Pi rekindled his desire to "tinker" but also provided him with an opportunity to give back to the community. Ian is also a very active volunteer, who works for The MagPi, a monthly magazine for the Raspberry Pi community, which you can read online or download for free from www.themagpi.com. He also holds an amateur radio license (callsign VE7FTO) and is a communications volunteer for his local community emergency management office. He was a technical reviewer for Raspberry Pi Cookbook for Python Programmers, by Packt Publishing.
I would like to thank my darling wife, Louise, and my awesome kids, Emily and Molly, who've allowed me to disappear into my office and have, consequently, trained our dog to fetch me!
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Preface
The Raspberry Pi is a credit card-sized computer designed to make computing accessible to all. With the trend towards making computers easier and easier to use, the art of programming has been in decline. Programming is a powerful tool that lets us tell the computer exactly what we want to do. In much the same way as we use a hammer or screwdriver to help us with a physical task, we can use programming to help us with a mental task. The Raspberry Pi exposes programming software to make it as easy as possible to get started.
After introducing the Raspberry Pi computer and showing you how to set it up, this book will guide you through six separate mini-projects. Each project is fun, visual, and has plenty of scope for personalization. By the end of this book, you will understand and be able to use three different programming languages, and will be able to use them to build creative programs of your own.
What this book covers
Chapter 1, Getting Started with Raspberry Pi, shows you what Raspberry Pi is and how you can get one set up and ready to use.
Chapter 2, Animating with Scratch, introduces the Scratch programming language and uses it to create simple (and not-so-simple) animations.
Chapter 3, Making Your Own Angry Birds Game, teaches you how to make your very own computer game using the Scratch programming language.
Chapter 4, Creating Random Insults, explores how random funny phrases can be generated using the Python programming language.
Chapter 5, Testing Your Speed, helps you to connect electronic components to your Raspberry Pi to create a physical game controlled by your computer code written in Python.
Chapter 6, Making an Interactive Map of Your City, teaches you more about Python and shows you how to access Google Maps to create a personal map of your area.
Chapter 7, Building Beats with Sonic Pi, introduces the Sonic Pi application and shows you how the programming concepts learned so far can be applied to the creation of music.
What you need for this book
All the projects in this book require Raspberry Pi and all the necessary peripherals (listed at the beginning of Chapter 1, Getting Started with Raspberry Pi). Chapter 5, Testing Your Speed, adds simple electronic components, listed at the beginning of that chapter. Chapter 7, Building Beats with Sonic Pi, requires headphones or speakers.
Who this book is for
This book is designed to help adults and children jump into creative coding using the Raspberry Pi. You will need patience, a sense of adventure, and a vivid imagination!
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Chapter 1. Getting Started with Raspberry Pi
In the mid-2000s, some of the staff at the University of Cambridge noticed that there were fewer students applying to study computer science each year, and that they didn't have very much experience. Something had to be done about this situation. The answer was the Raspberry Pi: a small, inexpensive computer which makes programming as accessible and as fun as possible. The idea is that students can play with the Raspberry Pi in their spare time, and in the process, learn valuable core computer science skills. Since its creation, many other groups have discovered how useful the Raspberry Pi can be, including schools, adults who want to brush up on their skills with technology, and electronics hobbyists.
This chapter describes how to get a Raspberry Pi computer up and running. Once this is done, the Pi behaves just like any other ordinary computer, and is capable of standard tasks, such as browsing the web and playing games. We will learn in later chapters that the Raspberry Pi is also capable of some things which ordinary computers can't easily do.
The following image shows an example of the Raspberry Pi that we will be using in the rest of the book:
Materials needed
Any model of the Raspberry Pi will work for the projects used in this book. The preceding image shows a Raspberry Pi Model B+, with four USB ports and a network connection. The Model A+ (with one USB port and no network connection) will also work, but a USB hub (which is described later) will be needed to allow both a keyboard and mouse to be used at the same time.
The Models A+ and B+ replace the older Models A and B, and have the same capabilities, but neater designs. You can identify the Plus models by looking at the mounting holes surrounded by metal. The Plus (+) models have four mounting holes in a rectangle, whereas the previous models have two or zero mounting holes. In the preceding image, two mounting holes are in the corners at the left end of the board, and the other two mounting holes are on the mid-right of the board.
The Raspberry Pi 2 looks almost the same as Model B+, but has a faster processor. This is not important for the projects in this book. Along with a Raspberry Pi computer, you will need other peripherals. In order to keep costs down, the Raspberry Pi was designed to work with devices that people already owned; you may find many of these components around your house already. Just make sure they're not in use before you take them!
Tip
http://elinux.org/RPi_VerifiedPeripherals is a useful website to check whether a particular device will work with the Raspberry Pi.
Power supply
The Raspberry Pi requires a micro-USB connection, which is capable of supplying at least 700 mA (or 0.7A) at 5V. Power supplies, which can give 1000 mA or more are available (and will be more reliable), but it must supply exactly 5 V. Most standard mobile phone chargers are suitable for this purpose, and have their capabilities written on them, so you can check. Do not attempt to power your Pi from the USB port of another computer or hub; they are often incapable of supplying the required current.
Storage
The operating system and files of Raspbian are stored on an SD card, which is similar to what you may find in a digital camera. The Raspberry Pi models A and B use a standard-sized SD card, while the A+, B+ and Pi 2 models use smaller microSD cards. You will need at least 4 GB of space (preferably 8 GB or more). The Raspberry Pi Foundation sells very affordable 8 GB SD cards with the operating system pre-installed, and these can be found at http://swag.raspberrypi.org/.
If you start with a blank SD card, you will also need a way of writing to it from another computer. Many computers have SD writers built in, but it is possible to buy USB dongles which do the job too.
Input
For inputs, we will use a USB keyboard and mouse:
Keyboard
Mouse
Video
We will use a monitor or a television with HDMI or DVI input, and a video cable connected from the Pi's HDMI port to the screen's input, as shown in the following figures. It is possible to connect to an older VGA or composite screen, but this is more complicated. Take a look at this website more information http://elinux.org/RPi_VerifiedPeripherals.
The following images show the display monitor and cables that you might use to connect the Pi to your monitor:
Monitor
DVI connector
HDMI connector
Network
An Internet connection
