Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Arduino Development Cookbook

You're reading from   Arduino Development Cookbook Over 50 hands-on recipes to quickly build and understand Arduino projects, from the simplest to the most extraordinary

Arrow left icon
Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781783982943
Length 246 pages
Edition 1st Edition
Tools
Concepts
Arrow right icon
Author (1):
Arrow left icon
Cornel M Amariei Cornel M Amariei
Author Profile Icon Cornel M Amariei
Cornel M Amariei
Arrow right icon
View More author details
Toc

Table of Contents (11) Chapters Close

Preface 1. Power on – Arduino Basics FREE CHAPTER 2. Blinking LEDs 3. Working with Buttons 4. Sensors 5. Motor Control 6. More Output Devices 7. Digital Communication with Arduino 8. Hacking A. Electronics – the Basics Index

Detecting motion – PIR sensor


Ever wondered how those motion sensors work? Usually, we find them in lights that turn up when we move. Almost all of them use a simple and common sensor called a Passive Infrared (PIR) sensor.

Here, we will build one of those annoying movement-sensitive lights, using an Arduino, its built-in LED, and a PIR sensor.

Getting ready

The following are the ingredients needed to execute this recipe:

  • An Arduino board connected to a computer via USB

  • Jumper wires

  • A PIR sensor

How to do it…

Hooking up a PIR sensor is easy:

  1. It has three terminals. One is the voltage input, one is the ground, and the last one is the data pin.

  2. Connect the ground on the PIR to one of the GND pins on the Arduino. Connect the voltage input to 5V, and finally, connect the data pin to one digital pin. Here we used pin 2.

Schematic

This is one possible implementation using pin D2 as the input:

Here is an example of how to wire it:

Code

The following code will read the value of the digital pin on which the PIR...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at £16.99/month. Cancel anytime