from the do-it-yourself-toll-gate dept.
MC68040 writes "The guy at this site managed to build something together that's actually quite neat in the way he built it, all hand-crafted system that uses a linux box to unlock his door. Maybe not the coolest of solutions, but actually a pretty good idea as for security in my humble opinion."
The best book on programming for the layman is "Alice in Wonderland";
but that's because it's the best book on anything for the layman.