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 ...

Combination locks are generally regarded as a simple, effective way to secure luggage. They’re small, light, and apparently reliable — the ideal travel accessory. But are they as safe as ...

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 ...

Since these locks are built into our luggage, we don't have to worry about losing them. Plus, you can usually choose your own ...