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Raspberry Pi 3 Cookbook for Python Programmers

Raspberry Pi 3 Cookbook for Python Programmers

By : Steven Lawrence Fernandes, Tim Cox
3.8 (10)
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Raspberry Pi 3 Cookbook for Python Programmers

Raspberry Pi 3 Cookbook for Python Programmers

3.8 (10)
By: Steven Lawrence Fernandes, Tim Cox

Overview of this book

Raspberry Pi 3 Cookbook for Python Programmers – Third Edition begins by guiding you through setting up Raspberry Pi 3, performing tasks using Python 3.6, and introducing the first steps to interface with electronics. As you work through each chapter, you will build your skills and apply them as you progress. You will learn how to build text classifiers, predict sentiments in words, develop applications using the popular Tkinter library, and create games by controlling graphics on your screen. You will harness the power of a built in graphics processor using Pi3D to generate your own high-quality 3D graphics and environments. You will understand how to connect Raspberry Pi’s hardware pins directly to control electronics, from switching on LEDs and responding to push buttons to driving motors and servos. Get to grips with monitoring sensors to gather real-life data, using it to control other devices, and viewing the results over the internet. You will apply what you have learned by creating your own Pi-Rover or Pi-Hexipod robots. You will also learn about sentiment analysis, face recognition techniques, and building neural network modules for optical character recognition. Finally, you will learn to build movie recommendations system on Raspberry Pi 3.
Table of Contents (23 chapters)
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Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Responding to a button


Many applications using the Raspberry Pi require that actions are activated without requiring a keyboard and screen to be attached to it. The GPIO pins provide an excellent way for the Raspberry Pi to be controlled by your own buttons and switches without a mouse/keyboard and screen.

Getting ready

You will need the following equipment:

  • 2 x DuPont female-to-male patch wires
  • Mini breadboard (170 tie points) or a larger one
  • Push-button switch (momentary close) or a wire connection to make/break the circuit
  • Breadboard wire (solid core)
  • 1K ohm resistor

The switches are as shown in the following diagram:

The push-button switch and other types of switch

Note

The switches used in the following examples are single-pole, single-throw (SPST), momentary close, push-button switches. Single pole (SP) means that there is one set of contacts that makes a connection. In the case of the push switch used here, the legs on each side are connected together with a single-pole switch in the middle...

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