Computers. Electronics. Laptop. Pc. Seminar_Information. Secret Knock Detecting Door Lock - Made by Steve Hoefer. Update #4: Nov 23: The Instructable is complete.
If you want more instructions than are listed here, go here and read all of the steps, see all the photos, and enjoy! Update #3: Nov 11: If you'd like to get updates about the progress of the kits (like when they'll be for sale and how much) you can sign up for the mailing list here.