Book Image

Arduino for Kids

By : Priya Kuber, Rishi Gaurav Bhatnagar, Vijay Varada
Book Image

Arduino for Kids

By: Priya Kuber, Rishi Gaurav Bhatnagar, Vijay Varada

Overview of this book

The mission of this book is to integrate technology with the tools that children already use for crafts so that they feel that the technology is an extension of their playtime. We use coding, sensors, and micro-controllers integrated with art and craft supplies, origami, and Playdough. There are 10 fun-filled chapters that talk to children directly, and give clear instructions for non-technical parents too. We use Arduino as the controller of choice due to its easy availability and large community. By the end of the book, children will comfortably be able to set up their Arduino, read and understand code, manipulate code, and ultimately write their own code for projects. They will also be able to use basic sensors and know how components connect to each other. All the learning takes place with lots of colorful pictures and the circuits are neatly presented using wiring.
Table of Contents (18 chapters)
Arduino for Kids
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Light sensitivity sensor - LDR


We know how resistor works right? Let's go back to Chapter 3, Components and Connections for a quick recap and come back here. It essentially restricts the flow of electrons in a circuit. Light Depended Resistor is a special kind of resistor that reduces its resistance when light falls on it. How does that work you ask? Good question.

Let's dig a little deeper into what is LDR and how it works. First of all, this is how the symbol of LDR looks like:

  

(Image source: https://cdn.instructables.com/F1H/DRCQ/IDCXJLG6/F1HDRCQIDCXJLG6.MEDIUM.jpg)

Symbol:

The arrow signs coming down show the light falling on the LDR. You know what everything in the world is made up of right? Remember we learnt about electrons in the beginning of the book? Electrons are the fundamental part of any material.

Let's start from there. So similar to electrons, photons are fundamental part of light. Light is not made up of only particles though, it has waves too (I know right? We think we...