IoT & Hardware
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You're reading from  Building Smart Homes with Raspberry Pi Zero

Product typeBook
Published inOct 2016
PublisherPackt
ISBN-139781786466952
Edition1st Edition
Tools
Raspberry Pi
Concepts
Single Board Computers
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Author (1)
Marco Schwartz
Marco Schwartz
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Marco Schwartz

Marco Schwartz is an electrical engineer, entrepreneur, and blogger. He has a master's degree in electrical engineering and computer science from Supélec, France, and a master's degree in micro engineering from the Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. He has more than five years' experience working in the domain of electrical engineering. Marco's interests center around electronics, home automation, the Arduino and Raspberry Pi platforms, open source hardware projects, and 3D printing. He has several websites about the Arduino, including the Open Home Automation website, which is dedicated to building home automation systems using open source hardware. Marco has written another book on home automation and the Arduino, called Home Automation With Arduino: Automate Your Home Using Open-source Hardware. He has also written a book on how to build Internet of Things projects with the Arduino, called Internet of Things with the Arduino Yun, by Packt Publishing.
Read more about Marco Schwartz

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Controlling the speed of a DC motor

In any smart home, chances are you will find a DC motor somewhere that you will need to automate. It could, for example, be on electric window blinds, or on an automated garage door. In this section, we are going to see how to control the speed of a simple DC motor and you will then be able to apply this to any motors you already have in your home.

Let's first see how to connect the DC motor to your Raspberry Pi Zero board. We actually won't connect the motor directly to the Raspberry Pi, as this would require a lot of external components, such as transistors, diodes, and so on. Instead, we'll use the L293D chip, which is a dedicated IC to control DC motors.

First, place the L293D on the board. The following diagram shows the pinout of the L293D:

You basically need to connect the components to the L293D as follows:

  • GPIO14 of the Raspberry Pi to pin 1A

  • GPIO15 of the Raspberry Pi to pin 2A

  • GPIO18 of the Raspberry Pi to pin 1,2EN

  • DC motor to pin 1Y and 2Y

  • 5V of the...

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Building Smart Homes with Raspberry Pi Zero
Published in: Oct 2016Publisher: PacktISBN-13: 9781786466952
© 2016 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Marco Schwartz

Marco Schwartz is an electrical engineer, entrepreneur, and blogger. He has a master's degree in electrical engineering and computer science from Supélec, France, and a master's degree in micro engineering from the Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. He has more than five years' experience working in the domain of electrical engineering. Marco's interests center around electronics, home automation, the Arduino and Raspberry Pi platforms, open source hardware projects, and 3D printing. He has several websites about the Arduino, including the Open Home Automation website, which is dedicated to building home automation systems using open source hardware. Marco has written another book on home automation and the Arduino, called Home Automation With Arduino: Automate Your Home Using Open-source Hardware. He has also written a book on how to build Internet of Things projects with the Arduino, called Internet of Things with the Arduino Yun, by Packt Publishing.
Read more about Marco Schwartz

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