In the old movies a little sliding door would open so the doorman could check you out and let you in.
Secret knock locking door.
Get it as soon as fri sep 18.
Unlock the door with a secret knock.
Lay out and test the.
This project will take several hours to complete.
Secret knock detecting door lock step 1.
Tools supplies and skills.
This section assumes that you know how to connect your arduino microcontroller to you.
More buying choices 16 11 2 used new offers.
A microphone okay really a speaker presses against the door and listens for knocks.
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.
If a piezo speaker hears the right number of.
Agptek 60kg 130lbs holding force electric magnetic lock for door access control system electromagnet fail safe nc mode.
With ismailsan s electronic lock the secret knock automatically unlocks the door.