I'm working on an Arduinoe based home automation and security system. I'm currently looking for an electric door lock that I can control from the Arduino (through a relay of course). Preferable I would like a lock which could be locked/unlocked with a regular key in addition, just in case the Arduino should fail.
I have searched ebay and other similar places but don't find exactly what I'm looking for. Anyone here that knows where I might find such a lock?