Serial Kickstarter and hardware developer Patrick Thomas Mitchell has this week launched his 19th Kickstarter campaign to raise the funds he requires to take his new Arduino compatible secret knock ...

Wouldn’t it be cool if you could just knock on your front door, and have it open automatically without having to fumble around with your keys? If that sounds like a dream come true, then you might ...

This repository explains how to build a Knock Sensor Lock using an Arduino UNO. The lock system listens to the knocks on the door. If the knock matches, the servo motor unlockes the door; on the other ...

this project and is attached to Arduino pin A0. When someone knocks, the knock is sensed by the piezo and a voltage value is sent to the A0 analog pin of the Arduino depending on the strength of the ...

[Rob Hemsley] sent in an update to an RFID-based door lock. Previously, if you wanted to enter the MIT media lab, a RFID-enabled card was required to get in. Now, with [Rob]’s update, you only need to ...

Watch any movie about the years of prohibition, and you’ll probably see character gain admittance to a speakeasy by using a secret knock on the door. In the old movies, a little sliding door would ...