The Atomic Heart station master door code puzzle requires you to find the button code ... the combination lock module blocking the station master’s office, look to the right of the Chatty ...

With an eight-button combination ... the Atomic Heart VDNH door code head through the office door opposite the combination lock and look at the blackboard on the right wall of the office ...

and an Enter/Lock Button, which you need to click after entering the door code or to relock the door after yourself. The keypad does require you to tap it and wake it up before you enter the code ...

If you're home and have your hands full with a project, you can even use a PIN code ... button on the bottom of the lock, it's not where people expect to look, and they may just knock on your door ...

You can see who opened the lock and when ... sometimes I walked right up to the door and . . . nothing. I could still unlock the door using the app or I could enter my code number.

That’s what [MakerMan] did with some off-the-shelf parts and just a little bit of code ... to the lock. For this, [MakerMan] added a button and LED to the outside of the door.

Philips created a new smart lock that doesn’t require a key or a code — all you need is your ... a built-in palm scanner that unlocks your door when it detects your unique palm print.