www.it-ebooks.info Raspberry Pi Projects for Kids Start your own coding adventure with your kids by creating cool and exciting games and applications on the Raspberry Pi Daniel Bates BIRMINGHAM - MUMBAI www.it-ebooks.info Raspberry Pi Projects for Kids Copyright © 2014 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 Production Reference: 1180314 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78398-222-6 www.packtpub.com Cover Image by ©iStock.com/pringletta Credits Author Project Coordinator Daniel Bates Mrudula Manjrekar Reviewers Proofreader Georg Bisseling Maria Gould Colin Deady Prasanna Gautam Indexer Priya Subramani Sungjin Han Claes Jakobsson Graphics Ian McAlpine Ronak Dhruv Acquisition Editors Production Coordinator Harsha Bharwani Komal Ramchandani Kunal Parikh Cover Work Content Development Editor Komal Ramchandani Mohammed Fahad Technical Editors Krishnaveni Haridas Ankita Thakur Copy Editors Insiya Morbiwala Kirti Pai 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 goes 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, Packt Publishing. About the Reviewers Georg Bisseling is a software developer with two decades of experience in many fields as diverse as neural networks, cryptography, radio monitoring, high performance computing, and business intelligence systems. He lives in Bonn, the former capital city of Western Germany. Colin Deady started his career in IT in the late 1990s when he discovered software testing ("They want me to break it?"), having previously fallen in love with computers, thanks to his parents buying a ZX81 and ZX Spectrum+ for him and his brother in the 1980s. He graduated to using an Amiga 1200 in the early 1990s and spent countless hours learning the insides of the operating system. Now, with 14 years of experience in testing, he works as a Test Manager with an emphasis on test automation, extolling the virtues of Agile using Kanban and behavior-driven development to great effect (test early, test often; fix early, fix often). In his spare time, Colin is part of the editorial team for The MagPi (www.themagpi.com), a community-written magazine for the Raspberry Pi. With several published articles and having reviewed and edited many more, he has built up extensive knowledge on this tiny platform. He can also be found jointly running The MagPi stand at regular Bristol DigiMakers events in the UK, demonstrating things such as a remote control robot arm, a roverbot, and LED display boards, all of which he has programmed in Python on the Raspberry Pi. He currently runs a blog related to all features of the Raspberry Pi at www.rasptut.co.uk. Prasanna Gautam is an engineer who wears many different hats depending on the occasion. He graduated from Trinity College in 2011 and is currently working as a software engineer at ESPN on cool projects. He has worked on building robots that extinguish fires in firefighting contests and robots that autonomously moved around obstacles. He was involved with the One Laptop Per Child (OLPC) event in Nepal and is fascinated by educational projects that teach programming and logic to kids. In his free time, Prasanna attempts to play the guitar and make sense of music theory. Sungjin Han likes to ride a bicycle and loves to tinker around on the dark terminal; he also enjoys newly released gadgets and technologies. Now, he is working for a startup in South Korea, looking for some more interesting stuff to dive in to. Claes Jakobsson started his career in the mid-90s and quickly became involved in the open source community, hacking code and organizing stuff in his hometown of Stockholm. Although Perl is his primary focus, he made forays into PostgreSQL, cURL, and other projects. His daytime occupation has been mostly financial systems, but at night, playing with embedded systems, microcontrollers, virtual machines, compilers, and the interest du jour kept the mind at bay. He is a technologist at heart with a mind to share, and he is always eager to see what happens next. Ian McAlpine was first introduced to computers at his school, to the research machine RML-380Z and his Physics teacher's Compukit UK101. That was followed by a Sinclair ZX81 and then a BBC Micro Model A, which he has to this day. That interest resulted in an MEng in Electronic Systems Engineering from Aston University and an MSc in Information Technology from the University of Liverpool. Ian is currently a senior product owner at SAP. The introduction of the Raspberry Pi rekindled his desire to "tinker", but also provided an opportunity to give back to the community. Consequently, Ian is a very active volunteer working on The MagPi, a monthly magazine for the Raspberry Pi, which you can read online or download for free from www.themagpi.com. I would like to thank my darling wife, Louise, and my awesome kids, Emily and Molly, for their patience and support. www.PacktPub.com Support files, eBooks, discount offers and more You might want to visit www.PacktPub.com for support files and downloads related to your book. Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub. com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at [email protected] for more details. At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks. 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Table of Contents Preface 1 Chapter 1: Getting Started with the Raspberry Pi 5 Materials needed 6 Power supply 6 Storage 6 Input 7 Video 7 Network 8 Preparing the SD card 8 Starting up the Raspberry Pi 10 Using your Raspberry Pi 13 The command line 13 Updating and installing new software 14 Other uses for Raspberry Pi 15 Troubleshooting 16 Summary 17 Chapter 2: Making Your Own Angry Birds Game 19 Scratch 20 Hello world! 21 Code tour 22 Creating a character 23 Creating a level 25 Moving the character 26 Initialization 26 Moving with the keyboard 27 Launch! 28 Flight 30