An electronic lock needs to be designed which is operated by entering a 4-bit password.
If the entered password is not correct, then the lock will not work.
In this project, you will design the electronic lock with the following requirements:
• A 4-bit password will be entered using 4 switches.
• There will be two output LED’s.
o A green LED is used to show if the lock is open or closed. It turns ON
when the password entered is found correct. Otherwise, the LED will
remain OFF.
o A red LED is used to show system lockout. It turns ON when a user does
not enter the correct password in three attempts.
o Only one LED must be ON at any time.
• A user is allowed only three tries for entering the correct password. After three
unsuccessful tries the system will lock out.
• There should be a reset switch which is used to reset the system.
• You should use a ROM device for storing the passwords.
Any extra features used to make the lock more sophisticated will receive bonus
points.
You will build and test your circuit in LogicWorks. You can use any type of gates and
MSI devices (such as ROM, Magnitude Comparators, Counters, etc.).