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.
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This section assumes that you know how to connect your arduino microcontroller to you.
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 project i used an arduino uno a piezo speaker and a servo motor.
Secret knock detecting door lock step 1.
Tools supplies and skills.
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With ismailsan s electronic lock the secret knock automatically unlocks the door.
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.
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This project will take several hours to complete.