This project will take several hours to complete.
Secret knock locking door.
Tools supplies and skills.
Secret knock detecting door lock step 1.
Free shipping on your first order shipped by amazon.
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.
A microphone okay really a speaker presses against the door and listens for knocks.
Unlock the door with a secret knock.
If a piezo speaker hears the right number of.
Lay out and test the.
Agptek 60kg 130lbs holding force electric magnetic lock for door access control system electromagnet fail safe nc mode.
In the old movies a little sliding door would open so the doorman could check you out and let you in.
4 4 out of 5 stars 166.
If the sequence isn t recognized the system resets and listens for knocks again.
If it hears the right number of knocks in the right cadence it triggers the motor to turn the deadbolt and unlock the door.