How to Create Redstone Combinations Locks in Minecraft « Minecraft :: WonderHowTo
4-Digit Locked door example. - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Assistance Needed] A 4 button combo lock, that with different combos, will power different outputs - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Tutorials/Combination locks – Minecraft Wiki
How to Make a Door That Locks in Minecraft: 12 Steps