Minecraft wiki entry for Combination_locks, associated text: 1 Order-insensitive combination locks
1.1 Lever lock
1.2 Item frame lock
1.3 RS NOR Combo Lock
2 Order-sensitive combination locks
2.1 Order-sensitive changing code XNOR Combo Lock
2.2 Order-sensitive RS NOR Combo Lock
2.2.1 Tutorial Video
2.2.2 Tutorial video
2.2.3 Combination lock with order-sensitive reset