Minecraft is a first-person fighter/sandbox construction game created by Mojang AB.
Compact Combination Lock
(view original)
Post a comment
Description
Very compact 4 digit/lever combination lock (3x10x4, WxLxH).
It contains a memory latch that opens the door and keeps it open even after the levers change position (so that you can open the door, change the levers to stop other people seeing the combination) and a button on the inside to lock the door after you enter.
Uses an AND and OR gate for checking for the correct combination (Gets inverted later on), an RS NOR latch for store the open/close state of the door and a NOT/inverter gate just above the door).
I have to be honest. Seeing this reminds of me games like Eye of the Beholder. Really takes me back :)