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Internet of Things with Raspberry Pi 3

You're reading from Internet of Things with Raspberry Pi 3

Product type Book

Published in Apr 2018

Publisher Packt

ISBN-13 9781788627405

Pages 248 pages

Edition 1st Edition

Languages

Concepts

Single Board Computers

Author (1):

Maneesh Rao

Table of Contents (11) Chapters

Preface

1. Introduction to IoT

2. Know Your Raspberry Pi

3. Let's Communicate

4. Weather Station

5. Controlling the Pi

6. Security Surveillance

7. Image Recognition

8. Bot Building

9. Security in IoT

10. Other Books You May Enjoy

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L293D

L293D is an integrated circuit chip most commonly used to drive the DC motor/stepper motor/gear motor. This IC consists of two H-bridges that can drive two DC motors simultaneously and in both clockwise and anticlockwise direction. It acts as an interface between the Raspberry Pi (or any other microprocessor) and the motor.

The DC motor needs a significant amount of current to start, which the Raspberry Pi is unable to provide as an output through GPIO. For example, a 5V DC motor needs around 300 to 400 mA current, which is way beyond what is available in the Raspberry Pi's GPIO, and if we directly connect the motor to the GPIO, it can damage the Pi. So, it is recommended you avoid directly connecting of the motor to Pi.

Let's look at the pin diagram for IC L293D to get an understanding of its operation:

L293D has a 16-pin configuration. There are two Enable pins...

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Authors (1)

Maneesh Rao

Maneesh Rao holds over 7 years of experience in software development, primarily in IoT. He has been a part of Thingworx IoT team. Thingworx is one of the most sought after IoT platforms. Furthermore, he has worked for one of the biggest consumer electronics company in India and developed IoT products for smart homes, smart factories, connected vehicles, and smart consumer appliances. He also assists start-ups in developing IoT products.

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