11 Stateful Lock

11 : Stateful Lock

How it works

A little two-bit state machine decides which code is required to enter the next state. The fourth state equals to the lock being open. A wrong code in any state resets to the first state.

How to test

To test the project, refer to its Wokwi, which is public.


# Input Output
0 unused lock status
1 reset unused
2 enter unused
3 code digit 0 unused
4 code digit 1 unused
5 code digit 2 unused
6 code digit 3 unused
7 code digit 4 unused