Secret keylock – with Arduino
I’ve seen many electronic keylocks, but this project is probably unique :)
In a nutshell – Arduino listens to knocking on a door and, if you are knocking with a specific rhythm, then it unlocks the door. Along with this, a simple method of learning the new cipher and it’s finished :)
If someone is interested, the details can be found on ArduinoFun a blog – code, diagrams, etc.