Is there anything cooler than requiring visitors to know a secret knock in order to gain entrance to your magical maker fortress? Doubtful. Here you’ll find instructions and a list of the parts required to set up a circuit that unlocks a door (or a box!) only when the correct secret knock is given.
Click here to learn how to construct a Secret Knock Lock!
(You’ll find this project in the Arduino Project Handbook)
For additional Make & Collaborate projects, click here.