For those of you who purchased the first edition of Mastering Microcontrollers Helped by Arduino, the extra chapter of the second and revised edition of this book is also available as a PDF file.
For this second edition, the author has designed a versatile printed circuit board that can be stacked on an Arduino board. The assembly can be used not only to try out many of the projects presented in this book but also allows for new exercises that in turn provide the opportunity to discover new techniques. Also available is a kit of parts including the PCB and all components. With this kit you can build most of the circuits described in the book and more.