Book Image

Mastering IOT

By : Colin Dow, Perry Lea
Book Image

Mastering IOT

By: Colin Dow, Perry Lea

Overview of this book

The Internet of Things (IoT) is the fastest growing technology market. Industries are embracing IoT technologies to improve operational expenses, product life, and people's well-being. We’ll begin our journey with an introduction to Raspberry Pi and quickly jump right into Python programming. We’ll learn all concepts through multiple projects, and then reinforce our learnings by creating an IoT robot car. We’ll examine modern sensor systems and focus on what their power and functionality can bring to our system. We’ll also gain insight into cloud and fog architectures, including the OpenFog standards. The Learning Path will conclude by discussing three forms of prevalent attacks and ways to improve the security of our IoT infrastructure. By the end of this Learning Path, we will have traversed the entire spectrum of technologies needed to build a successful IoT system, and will have the confidence to build, secure, and monitor our IoT infrastructure. This Learning Path includes content from the following Packt products: Internet of Things Programming Projects by Colin Dow Internet of Things for Architects by Perry Lea
Table of Contents (34 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Free Chapter
1
The IoT Story
Index

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 to the shaft of the motor) is spun. Precise steps are used, allowing precise control of the motor, as the number of steps may be controlled easily.

Stepper motors tend to be heavier and bulkier than other types of small motors.

The following photo shows a typical stepper motor...