Colophon

This book was written in the Markdown format with some extensions from leanpub. Then Leanpub used the Markdown sources to create the PDF, EPUB and MOBI versions.

The circuit for the UPS in chapter 3 was created using gschem from the gEDA project and then converted to PNG.

All images were processed using the GNU Image Manipulation Program (GIMP).

The device on the cover page is an open-case ALIX 2D3 with a CompactFlash card inserted in the card drive. I used these devices to test what I wrote in this book.