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Arduino Essentials

You're reading from   Arduino Essentials Enter the world of Arduino and its peripherals and start creating interesting projects

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Product type Paperback
Published in Feb 2015
Publisher Packt
ISBN-13 9781784398569
Length 206 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (12) Chapters Close

Preface 1. Meeting the Arduino Family 2. The Arduino Development Environment FREE CHAPTER 3. Interacting with the Environment the Digital Way 4. Controlling Outputs Softly with Analog Outputs 5. Sensing the Real World through Digital Inputs 6. Analog Inputs to Feel Between All and Nothing 7. Managing the Time Domain 8. Communicating with Others 9. Dealing with Interrupts 10. Arduino in a Real Case – Greenhouse Control Index

The analog output circuit

Once we know what is going to happen when we deal with analog outputs, I'll show you the circuit we are going to work with.

The analog output circuit

The circuit to connect an LED to a PWM pin

As you can see in the previous schematic, it's very similar to the circuit we used in Chapter 3, Interacting with the Environment the Digital Way, to deal digitally with an LED. However, in this case, we have to connect it to a PWM pin of the Arduino, pin 11 for this example, so that later in the program we can use the corresponding code to deal with it analogically.

The rest of the circuit is just the same as the blinking LED one, and we will use the same 220 Ohms resistance to limit the current that will flow through the LED to no more than 20 mA.

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