Amal Graafstra, author of the ExtremeTech guide RFID Toys, has posted a free bonus chapter on his website. The PDF document describes, step-by-step, how to install a deadbolt lock that can be controlled by an RFID (radio frequency ID) tag. While some of the other RFID-controlled home automation projects use a home computer, this one uses a door-mounted BASIC Stamp 2 microcontroller.
[Via hackAday]