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 ...

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 ...

Hideouts can’t be protected with a simple lock and key, those jobs require passwords or secret knocks. For the latter, you can go the extra mile and build a knock ...

[Paul Mandel] just finished building this knock box project. It’s a familiar concept that uses a solenoid to tap on the side of the box. The Arduino driven setup monitors vibrations on the lid. When ...

[Paul Mandel] just finished building this knock box project. It’s a familiar concept that uses a solenoid to tap on the side of the box. The Arduino driven setup monitors vibrations on the lid. When ...