This section assumes that you know how to connect your arduino microcontroller to you.
Secret knock locking door.
If a piezo speaker hears the right number of.
With ismailsan s electronic lock the secret knock automatically unlocks the door.
Agptek 60kg 130lbs holding force electric magnetic lock for door access control system electromagnet fail safe nc mode.
In this project i used an arduino uno a piezo speaker and a servo motor.
If the sequence isn t recognized the system resets and listens for knocks again.
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Lay out and test the.
A microphone okay really a speaker presses against the door and listens for knocks.
Tools supplies and skills.
This project will take several hours to complete.
If it hears the right number of knocks in the right cadence it triggers the motor to turn the deadbolt and unlock the door.
Unlock the door with a secret knock.
Secret knock detecting door lock step 1.