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Learning JavaScript Robotics

By : Kassandra Perch
Book Image

Learning JavaScript Robotics

By: Kassandra Perch

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Learning JavaScript Robotics
Kassandra Perch
Nov, 2015 | 160 pages
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Table of Contents (16 chapters)
Learning JavaScript Robotics
Learning JavaScript Robotics
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with JS Robotics
Getting Started with JS Robotics
Understanding JS Robotics, NodeBots, and Johnny-Five
Setting up your development environment
Hello, World! – Blinking an onboard LED
Summary
2
Working with Johnny-Five
Working with Johnny-Five
What you'll need for this chapter
How a Johnny-Five program works
Understanding events in Johnny-Five
Wiring up an external LED
Using the Read-Eval-Print-Loop (REPL)
Summary
3
Using Digital and PWM Output Pins
Using Digital and PWM Output Pins
What you'll need for this chapter
How GPIO pins work
Multiple pins with several LEDs
Using PWM pins with the Piezo element
Summary
4
Using Specialized Output Devices
Using Specialized Output Devices
What you'll need for this chapter
Outputs that require multiple pins
Checking compatibility with Johnny-Five
Obtaining documentation, wiring diagrams, and so on
Project – character LCD display
Summary
5
Using Input Devices and Sensors
Using Input Devices and Sensors
What you'll need for this chapter
How analog input pins work
Johnny-Five sensor events
Using basic inputs – buttons and potentiometers
Using sensors – Light and Temperature
Summary
6
Moving Your Bot
Moving Your Bot
What you'll need for this chapter
The different kinds of servos and motors
Special concerns when using motors and servos
Wiring up servos and motors
Creating a project with a motor and using the REPL
Creating a project with a servo and a sensor
Summary
7
Advanced Movement with the Animation Library
Advanced Movement with the Animation Library
What you'll need for this chapter
What is the Animation API?
Looking at the Animation API
Writing Servo Animations
Animation events
Summary
8
Advanced Components – SPI, I2C, and Other Devices
Advanced Components – SPI, I2C, and Other Devices
What you'll need for this chapter
Why do we need the I2C and SPI protocols?
Exploring SPI (Serial Peripheral Interface) devices
Exploring I2C devices
External Devices
Summary
9
Connecting NodeBots to the World, and Where to Go Next
Connecting NodeBots to the World, and Where to Go Next
What you'll need for this chapter
Connecting NodeBots to the Web
Johnny-Five and the wide world of microcontrollers
Other JS libraries and platforms
Where to go from here
Index
Index

Chapter 3. Using Digital and PWM Output Pins

In this chapter, we'll explore the pins of our microcontroller: how they work, how to manipulate them with Johnny-Five, and how different pins can be programmed to behave in different ways. We'll also build two new projects—one in which we will use several LEDs to explore the Led API more, and another in which we will use a Piezo element to make some music! We will cover the following topics in this chapter:

  • How GPIO pins work

  • Using multiple outputs with several LEDs

  • Using a PWM output with a Piezo element

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