Secret Knock Detecting Door Lock

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

Secret knock detecting door lock.

Unlock the door with a secret knock. This is the changes that i ve made added a hall effect sensor to determine if the door is open or closed swapped the gear motor with a servo added a serial lcd feedback screen added a yellow led added a bunch of extra features. This started out as a bit of a joke project but turned out to be surprisingly accurate at judging 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.

If a piezo speaker hears the right number of. Some examples are pir based security system rfid based security system digital lock system bio matrix systems electronics code lock. With ismailsan s electronic lock the secret knock automatically unlocks the door. Press the button to record a knock pattern then test it by knocking.

By default the knock is shave and a haircut but you can program it with anything up to 20 knocks long. 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. In this post let us build a secret knock detecting door lock using arduino which can detect the pattern of your knocks at the door and will only open the lock if the knocking pattern matches with the correct pattern. Build this project at our next weekend long arduino workshop.

Press the programming button and knock a new knock and it will now only open with your new knock. We use the arduino uno but any standard arduino is appropriate for this project. Secret knock detecting door lock. In this project i used an arduino uno a piezo speaker and a servo motor.

Hi all i ve done a bunch of modifications to steve hoefer s code for his secret knock detecting door lock. A microphone okay really a speaker presses against the door and listens for knocks.