Raspberry Pi LED Blueprints

Agus Kurniawan

• Publisher: Packt Publishing
• Year: 2015
• ISBN:
  9781782175759
• Edition: 1
• Topic: Computer Science
• Subtopic: Programming in Python
• Index: Computer Science

Design, build, and test LED-based projects using the Raspberry Pi

About This Book

• Implement real LED-based projects for Raspberry Pi
• Learn to interface various LED modules such as LEDs, 7-segment, 4-digits 7 segment, and dot matrix to Raspberry Pi
• Get hands-on experience by exploring real-time LEDs with this project-based book

Who This Book Is For

This book is for those who want to learn how to build Raspberry Pi projects utilising LEDs, 7 segment, 4-digits 7 segment, and dot matrix modules. You also will learn to implement those modules in real applications, including interfacing with wireless modules and the Android mobile app. However, you don't need to have any previous experience with the Raspberry Pi or Android platforms.

What You Will Learn

• Control LEDs, 7 segments, and 4-digits 7 segment from a Raspberry Pi
• Expand Raspberry Pi's GPIO
• Build a countdown timer
• Build a digital clock display
• Display numbers and characters on dot matrix displays
• Build a traffic light controller
• Build a remote home light control with a Bluetooth low energy module and Android
• Build mobile Internet-controlled lamps with a wireless module and Android

In Detail

Blinking LED is a popular application when getting started in embedded development. By customizing and utilising LED-based modules into the Raspberry Pi board, exciting projects can be obtained. A countdown timer, a digital clock, a traffic light controller, and a remote light controller are a list of LED-based inspired project samples for Raspberry Pi.

An LED is a simple actuator device that displays lighting and can be controlled easily from a Raspberry Pi. This book will provide you with the ability to control LEDs from Raspberry Pi, starting from describing an idea through designing and implementing several projects based on LEDs, such as, 7-segments, 4-digits 7 segment, and dot matrix displays.

Beginning with step-by-step instructions on installation and configuration, this book can either be read from cover to cover or treated as an essential reference companion to your Raspberry Pi. Samples for the project application are provided such as a countdown timer, a digital clock, a traffic light controller, a remote light controller, and an LED-based Internet of Things, so you get more practice in the art of Raspberry Pi development.

Raspberry Pi LED Blueprints is an essential reference guide full of practical solutions to help you build LED-based applications.

Style and approach

This book follows a step-by-step approach to LED-based development for Raspberry Pi, explained in a conversational and easy-to-follow style. Each topic is explained sequentially in the process of building an application, and detailed explanations of the basic and advanced features are included.

Raspberry Pi LED Blueprints

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Table of Contents

Raspberry Pi LED Blueprints

Credits

About the Author

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Getting Started with LED Programming through Raspberry Pi GPIO

Setting up Raspberry Pi

Introducing Raspberry Pi GPIO

Blinking LEDs

Turning an LED on/off using a push button

Changing color through an RGB LED

Summary

2. Make Your Own Countdown Timer

Introducing a 7-segment display

Introducing a shift register

Driving a 7-segment display using a shift register

Working with a 4-digit 7-segment display

Building a countdown timer

Summary

3. Make Your Own Digital Clock Display

Introducing a 4-digit 7-segment display for a digital clock

Introducing an I2C OLED graphic display

Enabling I2C on Raspberry Pi

The I2C library for Python

Displaying numbers and characters

Building a digital clock using an I2C OLED graphic display

Summary

4. LED Dot Matrix

Introducing LED dot matrix display (8 x 8 LEDs)

Introducing an LED dot matrix driver

Enabling Raspberry Pi SPI

Deploying a matrix 7219 driver

Displaying a random number on the LED dot matrix display

Displaying a random character on the LED dot matrix display

Building a ball reflection game

Cascading LED dot matrix modules

Summary

5. Building Your Own Traffic Light Controller

Introducing a traffic light controller

Designing a traffic light controller

Controlling AC/DC lamps using channel relay modules

Expanding Raspberry Pi GPIO

Building a traffic light controller

Cascading traffic light controllers

Summary

6. Building Your Own Light Controller-based Bluetooth

Introducing Bluetooth

Working with Bluetooth using Raspberry Pi

Setting up a Bluetooth USB

Turning on/off Bluetooth

Enabling discoverable

Scanning for Bluetooth Devices

Introducing iBeacon

Bluetooth programming on Android

Building a remote light controller-based Bluetooth

Wiring

Building a program for Raspberry Pi

Building a Bluetooth app for Android

Testing

Summary

7. Making Your Own Controlled Lamps Through Internet Network

Connecting the Raspberry Pi to a network

Connecting to a wired network

Connecting to a wireless network

Introducing Node.js

Controlling LEDs and lamps using Node.js

Building a simple web server using Node.js

Building RESTful using Node.js

Controlling LEDs through RESTful

Building a PhoneGap application for Android

Connecting PhoneGap Android to Raspberry Pi through RESTful

Summary

Index

Raspberry Pi LED Blueprints

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: September 2015

Production reference: 1210915

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78217-575-9

www.packtpub.com

Credits

Author

Agus Kurniawan

Reviewers

David Alcoba

Parul Sharma

Commissioning Editor

Neil Alexander

Acquisition Editor

Vivek Anantharaman

Content Development Editor

Aparna Mitra

Technical Editor

Tejaswita Karvir

Copy Editor

Dipti Mankame

Project Coordinator

Izzat Contractor

Proofreader

Safis Editing

Indexer

Hemangini Bari

Graphics

Jason Monteiro

Production Coordinator

Shantanu N. Zagade

Cover Work

Shantanu N. Zagade

About the Author

Agus Kurniawan is a lecturer, IT consultant, and author. He has experience in various software and hardware development projects, delivering materials in training and workshops, and delivering technical writing for 14 years. He has been awarded the Microsoft Most Valuable Professional (MVP) award for 11 years in a row.

He is currently doing some research and teaching activities related to networking and security systems at the Faculty of Computer Science, ...

Table of contents

• Raspberry Pi LED Blueprints