If the precision is turned all the way up it can even detect people apart.
The secret knock detecting door lock.
Programming electronics academy 15 491 views 12 57.
Secret knock detecting door lock.
Secret knock detecting door lock.
In this project i used an arduino uno a piezo speaker and a servo motor.
Protect your secret hideout from intruders with a lock that will only open when it hears the secret knock.
If you want more instructions than are listed here go here and read all of the steps see all the photos and enjoy.
November 02 2009 electronics problem solving software.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
Programming electronics academy 15 490 views 12 57.
Programming electronics academy 15 942 views 12 57.
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.
If a piezo speaker hears the right number of.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.
Easy secret knock detector to trigger anything with only an arduino and a few cheap components duration.
Share this protect your secret hideout from intruders with a lock that will only open when it hears the secret knock.
This started out as a bit of a joke project but turned out to be surprisingly accurate at judging knocks.
The instructable is complete.