Imgur user [Criand] has been hard at work on his own project made entirely out of paper, a combination lock that can hold a secret message (reddit post). The motivation for the project was as a ...

Here’s a really fascinating circuit that implements a combination lock using relays and logic gates. Even with the schematic and written explanation of how it works we’re still left somewhat ...

With bike theft continuing to rise it's important to have some sort of bike lock and to always lock up your bike. Some of the best bike locks can be pretty cumbersome and heavy to carry around ...