I've used a combination padlock for years, but never really understood how it worked until I made this video. The combination ...

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 ...

A secure locking mechanism, like a double-locking shackle or high-security combination, is also essential for resisting tampering or brute force attacks. Equally important is the padlock’s ...