The Reverse Geocache Puzzle
When Mikal Hart's friend got married he built a box that could only be opened in a special location. An absolutely brilliant idea and he share's how he did it!
http://arduiniana.org/projects/the-reverse-geo-cache-puzzle/
Arduino Experimentation Kit:. (ARDX)
Oomlout's supercool arduino tutorial on Make, complete with breadboard overlays!
Free: The Future of a Radical Price
I train endurance riding which means long hours in the saddle, mainly at a brisk walk. Often I take the opportunity of so much uninterupted time listen to an ebook or a podcast. Yesterday I downloaded Chris Andersons Free: The Future of a Radical Price and found him a wonderfully entertaining companion. The book has received criticism for being heavily wikipedia researched and maybe it shows in the print version but hardly in the audio version. Chris reads it well and I find myself chuckling frequently. He entertains and is thought-provoking. Highly recommended!
(Chris Anderson is editor of chief of Wired magazine. He was U.S. business editor at The Economist. He began his career at the two premier science journals Science and Nature. He holds a Bachelor of Science degree in Physics from George Washington University and studied Quantum Mechanics and Science Journalism at the University of California at Berkeley.)