Keypad Password Door Lock Demo

Project Overview

Create a local access-control demonstration with lockout after repeated failures.

Objectives & Learning Outcomes

Key scanning, PIN validation, state machine and timeout handling

Required Hardware

Arduino Uno, 4×4 keypad, servo, LCD, pushbutton

Suggested Build Stages

1. Review the components and create a low-voltage wiring plan.
2. Assemble the prototype and test each sensor or module individually.
3. Implement firmware, display or communications in small verified steps.
4. Integrate the modules and document operating states and failures.
5. Run validation tests and prepare demonstration documentation.

Testing & Validation

Verify wrong PIN lockout, reset and power-cycle behavior.

Suggested Deliverables

Working demonstration, wiring diagram, commented firmware, test observations, component list, project report outline and presentation outline.

Educational project concept. Verify circuit values, actual component compatibility and safe operating limits before assembly. Illustrations are representative, not exact build photographs.