Book Image

Mastering Arduino

By : Jon Hoffman
Book Image

Mastering Arduino

By: Jon Hoffman

Overview of this book

Mastering Arduino is an all-in-one guide to getting the most out of your Arduino. This practical, no-nonsense guide teaches you all of the electronics and programming skills that you need to create advanced Arduino projects. This book is packed full of real-world projects for you to practice on, bringing all of the knowledge in the book together and giving you the skills to build your own robot from the examples in this book. The final two chapters discuss wireless technologies and how they can be used in your projects. The book begins with the basics of electronics, making sure that you understand components, circuits, and prototyping before moving on. It then performs the same function for code, getting you into the Arduino IDE and showing you how to connect the Arduino to a computer and run simple projects on your Arduino. Once the basics are out of the way, the next 10 chapters of the book focus on small projects centered around particular components, such as LCD displays, stepper motors, or voice synthesizers. Each of these chapters will get you familiar with the technology involved, how to build with it, how to program it, and how it can be used in your own projects.
Table of Contents (23 chapters)

Casting

The cast operator will convert the variable type to a different type. This will enable us to perform operations, like arithmetic operations, on variables of different types. For example, if we want to add two variables where one is of the float type and the other is of the integer type, then we will need to cast one of them, so the two variables are of the same type.

One thing to note is when we cast a float value to an integer value the value is truncated and not rounded. This means that if the float variable contains the value 2.9 and we cast it to an integer, the value will be 2. With this in mind, we generally want to cast integer values to float values rather than float values to integer values even if it means the operation will take longer.

The following code shows how we could cast an integer variable as a float variable to perform arithmetic calculations:

int...