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Internet of Things Programming Projects

You're reading from   Internet of Things Programming Projects Build modern IoT solutions with the Raspberry Pi 3 and Python

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789134803
Length 436 pages
Edition 1st Edition
Languages
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Author (1):
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Colin Dow Colin Dow
Author Profile Icon Colin Dow
Colin Dow
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Table of Contents (21) Chapters Close

Preface 1. Installing Raspbian on the Raspberry Pi FREE CHAPTER 2. Writing Python Programs Using Raspberry Pi 3. Using the GPIO to Connect to the Outside World 4. Subscribing to Web Services 5. Controlling a Servo with Python 6. Working with the Servo Control Code to Control an Analog Device 7. Setting Up a Raspberry Pi Web Server 8. Reading Raspberry Pi GPIO Sensor Data Using Python 9. Building a Home Security Dashboard 10. Publishing to Web Services 11. Creating a Doorbell Button Using Bluetooth 12. Enhancing Our IoT Doorbell 13. Introducing the Raspberry Pi Robot Car 14. Controlling the Robot Car Using Python 15. Connecting Sensory Inputs from the Robot Car to the Web 16. Controlling the Robot Car with Web Service Calls 17. Building the JavaScript Client 18. Putting It All Together 19. Assessments 20. Other Books You May Enjoy

Wiring up a servo motor to the Raspberry Pi

This project involves wiring up a servo motor to our Raspberry Pi. Many people confuse servo motors with stepper and DC motors. Let's take a look at the differences between these types of motors.

Stepper motors

Stepper motors are brushless DC electrical motors that move a full rotation of equal steps. The position of the motor is controlled without the use of a feedback system (open-loop system). This makes stepper motors relatively inexpensive and popular for robotics, 3-D printers, and CNC-type applications.

The following is a crude diagram of the internal workings of a stepper motor:

By turning on and off the coils A and B in sequence, the Permanent Magnet (which is attached...

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