Book Image

C Programming for Arduino

By : Julien Bayle
Book Image

C Programming for Arduino

By: Julien Bayle

Overview of this book

Physical computing allows us to build interactive physical systems by using software & hardware in order to sense and respond to the real world. C Programming for Arduino will show you how to harness powerful capabilities like sensing, feedbacks, programming and even wiring and developing your own autonomous systems. C Programming for Arduino contains everything you need to directly start wiring and coding your own electronic project. You'll learn C and how to code several types of firmware for your Arduino, and then move on to design small typical systems to understand how handling buttons, leds, LCD, network modules and much more. After running through C/C++ for the Arduino, you'll learn how to control your software by using real buttons and distance sensors and even discover how you can use your Arduino with the Processing framework so that they work in unison. Advanced coverage includes using Wi-Fi networks and batteries to make your Arduino-based hardware more mobile and flexible without wires. If you want to learn how to build your own electronic devices with powerful open-source technology, then this book is for you.
Table of Contents (21 chapters)
C Programming for Arduino
About the Author
About the Reviewers

Building LED arrays

LED arrays are basically LEDs wired as a matrix.

We are going to build a 3 x 3 LEDs matrix together. This is not that hard, and we'll approach this task with a really nice, neat and smart concept that can really optimize your hardware designs.

Let's check the simplest schematic of this book:

An LED can blink when a current feeds it, when a voltage is applied to its legs

In order to switch off the LED shown in the preceding screenshot, we can stop to create the 5 V current at its node. No voltage means no current feeding. We can also cut the circuit itself to switch off the LED. And at last, we can change the ground by putting adding a 5 V source current.

This means that as soon as the difference of potential is cancelled, the LED is switched off.

An LED array is based on these double controls possible.

We are going to introduce a new component right here, the transistor.

A new friend named transistor

A transistor is a special component that we introduced a bit in the first part...