Final Project: Digital Lock System

Objective: Design and implement a digital lock system using both combinational and sequential circuits.

Project Description: Students will design a digital lock system where a specific sequence of inputs $($like a

combination code$)$ must be entered correctly to unlock a digital lock. The system will have the following components:

Input Unit: Keypad or switch matrix to enter the combination.

Control Unit: Handles the sequence of inputs and determines if the correct sequence has been entered.

Output Unit: Indicates whether the lock is in the locked or unlocked state using LEDs or a display.

Components and Requirements:

Input Unit:

Design a keypad matrix or a set of switches for input.

Each key press should generate a unique binary code.

Control Unit:

Use combinational logic to decode the inputs from the keypad.

Implement a finite state machine $($FSM$)$ using sequential circuits to handle the input sequence.

The FSM should move through states based on the sequence of inputs and determine if the correct Implement a finite state machine $($FSM$)$ using sequential circuits to handle the input sequence.

The FSM should move through states based on the sequence of inputs and determine if the correct

combination has been entered.

Output Unit:

Use LEDs or a $7-$segment display to show the lock status $($locked$/$unlocked$).$

Implement a reset mechanism to re$-$lock the system after a certain period of inactivity or after an incorrect

combination is entered.

Deliverables:

Design Documentation:

Schematic diagrams of the combinational and sequential circuits.

State diagrams and truth tables for the FSM$.$

Detailed explanation of the design and how each part works.

Simulation:

Use software tools $($like Multisim, Logisim, or any other digital circuit simulation tool$)$ to simulate the circuit.

Demonstrate the working of the lock system through the simulation.

Prototype $($Optional$)$: Use software tools $($like Multisim, Logisim, or any other digital circuit simulation tool$)$ to simulate the circuit.

Demonstrate the working of the lock system through the simulation.

Prototype $($Optional$)$:

Build a physical prototype using digital logic ICs or a microcontroller $($e$.$g$.,$ Arduino$).$

Demonstrate the working prototype to the class.

Report and Presentation:

Write a final report summarizing the project, design process, challenges faced, and solutions implemented.

Prepare a presentation to showcase the project to the class.

Evaluation Criteria:

Correctness and completeness of the design.

Functionality and reliability of the simulation$/$prototype$.$

Clarity and thoroughness of the documentation and report.

Quality of the presentation and ability to explain the project.

This project will help students apply their knowledge of both combinational and sequential circuits in a practical, rea

world application. It will also enhance their skills in circuit design, simulation, and documentation.