This project will take several hours to complete.
Secret knock locking door.
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In the old movies a little sliding door would open so the doorman could check you out and let you in.
Secret knock detecting door lock step 1.
This section assumes that you know how to connect your arduino microcontroller to you.
If a piezo speaker hears the right number of.
A microphone okay really a speaker presses against the door and listens for 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.
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Lay out and test the.
Tools supplies and skills.
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In this project i used an arduino uno a piezo speaker and a servo motor.
With ismailsan s electronic lock the secret knock automatically unlocks the door.
Get it as soon as fri sep 18.