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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

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Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781783982943
Length 246 pages
Edition 1st Edition
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Author (1):
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Cornel M Amariei Cornel M Amariei
Author Profile Icon Cornel M Amariei
Cornel M Amariei
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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

Connecting a button

One of the basic interactions you can have with the Arduino is pushing a button, which causes another action. Here, we will see how to connect and use a button.

To keep the example simple, we will connect a button to the Arduino, and whenever we press and hold it, the internal Arduino LED will light up. But first, we need to talk a little about buttons. There are a few common configurations found in everyday electronics. We can categorize buttons/switches based on three main characteristics:

  • Momentary and maintained buttons
  • Open or closed buttons
  • Poles and throws

Momentary buttons are active as long as they are pressed, while maintained buttons keep the state we let them in. Keyboards have momentary buttons while the typical light switch is a maintained button.

Momentary buttons can either be opened or closed. This reflects the connection state when not pressed. A closed momentary switch will conduct current while not pressed and interrupt the current when pressed. An opened...

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