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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

Wiring up an external LED

For our first hardware project, we're going to wire an LED to the Arduino. An LED, or a Light Emitting Diode, is a component that lights up when electric current is passed through it. They come in many colors and sizes and are one of the most easy-to-use and versatile components in hobbyist robotics.

Setting up the hardware

First, take an LED. We'll determine the positive and negative leads of the LED—for this component, it's straightforward: the positive lead is longer than the negative lead.

Setting up the hardware

Determining the positive and negative ends of an LED

To wire the LED to an Arduino, place the positive lead on pin 11 and the negative lead on the pin marked GND, just like in the following diagram:

Setting up the hardware

Wiring up our LED

You can also use a breadboard if you wish to—it will look like the following:

Setting up the hardware

Wiring an LED with a breadboard

Now that we've wired up the LED, we're going to make it blink as we did in the last chapter. The script looks very familiar...

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