Book Image

Raspberry Pi By Example

By : Arush Kakkar
Book Image

Raspberry Pi By Example

By: Arush Kakkar

Overview of this book

Want to put your Raspberry Pi through its paces right out of the box? This tutorial guide is designed to get you learning all the tricks of the Raspberry Pi through building complete, hands-on hardware projects. Speed through the basics and then dive right in to development! Discover that you can do almost anything with your Raspberry Pi with a taste of almost everything. Get started with Pi Gaming as you learn how to set up Minecraft, and then program your own game with the help of Pygame. Turn the Pi into your own home security system with complete guidance on setting up a webcam spy camera and OpenCV computer vision for image recognition capabilities. Get to grips with GPIO programming to make a Pi-based glowing LED system, build a complete functioning motion tracker, and more. Finally, get ready to tackle projects that push your Pi to its limits. Construct a complete Internet of Things home automation system with the Raspberry Pi to control your house via Twitter; turn your Pi into a super-computer through linking multiple boards into a cluster and then add in advanced network capabilities for super speedy processing!
Table of Contents (22 chapters)
Raspberry Pi By Example
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Building a binary clock


In this example, we will be building a binary clock using the club PiGlow in which each hour, minute, and second is represented by the three arms of PiGlow. The numbers are displayed in the binary format. We will now look at the code and learn what each part does:

import piglow
from time import sleep
from datetime import datetime

piglow.auto_update = True

show12hr = 1
ledbrightness = 10

piglow.all(0)

hourcount = 0
currenthour = 0

Like the previous example, we import PiGlow and the time libraries, but we also import an additional library, datetime, which gives us the current time. Then, we set the auto-update parameter to true so that PiGlow updates as soon as we make a change to it rather than pushing all the changes at once. We will now set some customization parameters, namely selecting between a 12-hour format or a 24-hour format and the brightness of the LEDs. With that completed, we refresh the LED to the 0 level and set the hour counters. Now we are ready...