Secret Knock Detecting Door Lock

Use your favorite song morse code whatever.

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. If the sequence isn t recognized the system resets and listens for knocks again. Protect your secret hideout from intruders with a lock that will only open when it hears the 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.

Press the programming button and knock a new knock and it will now only open with your new knock. Some examples are pir based security system rfid based security system digital lock system bio matrix systems electronics code lock. If it hears the right number of knocks in the right cadence it triggers the motor to turn the deadbolt and unlock the door. 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.

We use the arduino uno but any standard arduino is appropriate for this project. By default the knock is shave and a haircut but you can program it with anything up to 20 knocks long. Build this project at our next weekend long arduino workshop. If a piezo speaker hears the right number of.

In the old movies a little sliding door would open so the doorman could check you out and let you in. Press the button to record a knock pattern then test it by knocking. A microphone okay really a speaker presses against the door and listens for knocks. With ismailsan s electronic lock the secret knock automatically unlocks the door.

In this project i used an arduino uno a piezo speaker and a servo motor. Unlock the door with a secret knock.