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Arduino Essentials

By : Perea

5 (5)

Arduino Essentials

5 (5)

By: Perea

Overview of this book

If you are a hobbyist who wants to develop projects based on Arduino as the main microcontroller platform or an engineer interested in finding out what the Arduino platform offers, then this book is ideal for you. Some prior knowledge of the C programming language is required.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Disclaimer

Free Chapter

1. Meeting the Arduino Family

1. Meeting the Arduino Family

A game changer

Common features

Just one to rule them all

Users teaching users

Summary

2. The Arduino Development Environment

2. The Arduino Development Environment

A multiplatform tool

Downloading the package

Installing the software

Installing the drivers

Running the Arduino development environment for the first time

Preflight checks

Uploading our first sketch

Main menus and commands

The Arduino language

Summary

3. Interacting with the Environment the Digital Way

3. Interacting with the Environment the Digital Way

Digital versus analog signals

Our first circuit

Summary

4. Controlling Outputs Softly with Analog Outputs

4. Controlling Outputs Softly with Analog Outputs

Dealing with analog signals

The analog output circuit

Connections diagram

Analog control through code

Motor control with a transistor

Summary

5. Sensing the Real World through Digital Inputs

5. Sensing the Real World through Digital Inputs

Sensing by using inputs

Connecting a button as a digital input

The momentary push button

Complete circuit schematic

Breadboard connections diagram

Writing code to react to a press

Timing and debouncing

Other types of digital sensors

Using an optocoupler as a coin detector

The schematic of the coin detector

The breadboard connections diagram

The complete example code

A real working project

Summary

6. Analog Inputs to Feel Between All and Nothing

6. Analog Inputs to Feel Between All and Nothing

Sensing analog values

The Arduino map function

An ambient light meter

An ambient light meter circuit

DC motor speed control revisited

Summary

7. Managing the Time Domain

7. Managing the Time Domain

Time control functions

Making some noise

A bigger project – a metronome

Summary

8. Communicating with Others

8. Communicating with Others

Serial communications concepts

Other types of serial communication

Calibrating sensors serially

Sending data to Arduino

A computer connected dial thermometer

Summary

9. Dealing with Interrupts

9. Dealing with Interrupts

The concept of an interruption

The tachograph project

A dial tachograph

Summary

10. Arduino in a Real Case – Greenhouse Control

10. Arduino in a Real Case – Greenhouse Control

A greenhouse controller

The greenhouse controller code

Summary

Index

Index

Customer Reviews

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The Arduino map function

Mapping a value from one range to another is a very simple thing. It's just a matter of finding which value will be at the same point of the output range as compared to the input range. Let's see it with a simple example.

If we have a possible input value of 0 to 100 and an allowed output range of 0 to 500 and we take a sample value of 75, we can say that it is at 75 percent of its input range, can't we? Well, which value will be at 75 percent of the output range, then? We will usually just make a simple correspondence:

Output Value = (Input Value x Maximum Output Value) / Maximum Input Value

Or, we will use the values in our example:

Output Value = (75 x 500) / 100 = 375

Here, 375 is just 75 percent of 500. Simple, isn't it?

It is so simple but also so common in the Arduino environment that we have a specific function to make this kind of mapping in the Arduino language, which is appropriately called the map() function.

As you can see by following...

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