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Learning Javascript Robotics

Learning Javascript Robotics

By : Kassandra Perch
4.3 (6)
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Learning Javascript Robotics

Learning Javascript Robotics

4.3 (6)
By: Kassandra Perch

Overview of this book

There has been a rapid rise in the use of JavaScript in recent times in a variety of applications, and JavaScript robotics has seen a rise in popularity too. Johnny-Five is a framework that gives NodeBots a consistent API and platform across several hardware systems. This book walks you through basic robotics projects including the physical hardware builds and the JavaScript code for them. You'll delve into the concepts of Johnny-Five and JS robotics. You'll learn about various components such as Digital GPIO pins, PWM output pins, Sensors, servos, and motors to be used with Johnny-Five along with some advanced components such as I2C, and SPI. You will learn to connect your Johnny-Five robots to internet services and other NodeBots to form networks. By the end of this book, you will have explored the benefits of the Johnny-Five framework and the many devices it unlocks.
Table of Contents (11 chapters)
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10
Index

Special concerns when using motors and servos


Projects that use servos and motors have some special considerations for them that are mostly focused around power and the fact that Johnny-Five projects are tethered to the computer running the Johnny-Five code.

Power concerns

Servos and motors draw a lot of power. This can be an issue when you are using several of them. If you are using 5V servos and motors and more than two or three at a time, you should use an external power supply for your Arduino to draw this extra current without affecting performance. These power supplies are usually plugged in to an external outlet, and look like the following figure.

Note

WARNING!

Before plugging any external power supply into your board, make sure that the board you are using is voltage regulated for the voltage of the power supply; for an Arduino Uno, this is 12V. When in doubt, use a 5V power supply for Arduinos. Also, follow proper safety protocols when dealing with outside power sources. SparkFun...

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