Secret Knock Detecting Door Lock

If the sequence isn t recognized the system resets and listens for knocks again.

Secret knock detecting door lock.

Use your favorite song morse code whatever. Press the programming button and knock a new knock and it will now only open with your new knock. Press the button to record a knock pattern then test it by knocking. Unlock the door with a secret knock.

Build this project at our next weekend long arduino workshop. In the old movies a little sliding door would open so the doorman could check you out and let you in. In this project i used an arduino uno a piezo speaker and a servo motor. A microphone okay really a speaker presses against the door and listens for knocks.

If it hears the right number of knocks in the right cadence it triggers the motor to turn the deadbolt and unlock the door. Hi all i ve done a bunch of modifications to steve hoefer s code for his secret knock detecting door lock. This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks. By default the knock is shave and a haircut but you can program it with anything up to 20 knocks long.

With ismailsan s electronic lock the secret knock automatically unlocks the door. We use the arduino uno but any standard arduino is appropriate for this project. The secret door knocker uses a piezo element to record and detect your secret knock pattern then turns a servo motor that you can connect to your door lock. Some examples are pir based security system rfid based security system digital lock system bio matrix systems electronics code lock.

Secret knock detecting door lock. If a piezo speaker hears the right number of.