The microcontroller unit (MCU) is the ultimate electronics tinker-toy, and in this book you’re going to see how to tinker away with it to your heart’s delight! My intended audience for this book is those who like to learn hands-on. Learning by doing and seeing has always been my preferred way to learn: If it’s yours too, let’s take the
ride together. For those who like to understand the “why” first of all, the book also includes some background material that explains why using microcontrollers in everyday situations can be such a powerful concept.

My only assumption is that you have some very basic knowledge of digital electronics. But, if that’s not you, don’t worry! There are some appendixes that will give you the start that you need—and the book’s web site (and various references through the text of the book) also point you to some valuable AVR MCU-related online resources.