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.
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.
If a piezo speaker hears the right number of.
If the precision is turned all the way up it can even detect people apart.
November 02 2009 electronics problem solving software.
Some examples are pir based security system rfid based security system digital lock system bio matrix systems electronics code lock.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
The instructable is complete.
If the precision is turned all the.
Programming electronics academy 15 942 views 12 57.
Programming electronics academy 15 490 views 12 57.
Secret knock detecting door lock.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
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.
Programming electronics academy 15 491 views 12 57.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.