RFID reader lock

From Alpha One Labs

• Get request code
• code the application
• Use arduino $30
• Buy 10 cards $15
• Send string like ?id=2

card -> reader-> arduino -> ethernet -> server -> lock

Tables: users

• id
• name
• dates
• status

tokens

• id
• user_id
• status
• ringtone

access_log

• id
• access_time
• token_id

strike plate - http://www.smarthome.com/5190/Electric-Door-Strike-8-16VAC-220/p.aspx

What about https://256.makerslocal.org/wiki/index.php/USB_Auth , it can be adapted to any door with a deadbolt and uses something that most everyone already have.

If we use a stepper motor there will be less turning resistance, though we'd have to use switches or Hall Effect to know where the deadbolt was. Alternately, set the nails at 90° instead of parallel (maybe closer to 120°), then have the servo turn 90° then return to center, so it will always try to put the deadbolt where it wants to, but will just turn freely if the deadbolt is already there.

Here's a video explaining how it works: http://www.youtube.com/watch?v=JKTXRlaXLDQ

http://hackaday.com/2009/11/17/rfid-door-lock-the-right-way/