Share this protect your secret hideout from intruders with a lock that will only open when it hears the secret knock.
The secret knock detecting door lock.
November 02 2009 electronics problem solving software.
If a piezo speaker hears the right number of.
If the precision is turned all the.
Unlock the door with a secret knock.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.
Protect your secret hideout from intruders with a lock that will only open when it hears the secret knock.
Some examples are pir based security system rfid based security system digital lock system bio matrix systems electronics code lock.
Secret knock detecting door lock.
Programming electronics academy 15 942 views 12 57.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
In this project i used an arduino uno a piezo speaker and a servo motor.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.
The instructable is complete.
Programming electronics academy 15 490 views 12 57.
If the precision is turned all the way up it can even detect people apart.
Secret knock detecting door lock.
If you want more instructions than are listed here go here and read all of the steps see all the photos and enjoy.