Fingerprint Sensor With Blink Board

Introduction

Security is a top priority in both residential and commercial spaces. A fingerprint-based gate access system offers a simple, secure, and automated solution for managing entry. By leveraging a fingerprint sensor, a Blink Board, and a relay, this project provides restricted access to authorized individuals while denying entry to unauthorized personnel.

The system is designed for convenience, security, and minimal hardware complexity. Fingerprint data is stored directly in the sensor, removing the need for external storage. Successful authentication triggers the relay to open the gate/door for a limited time, while unauthorized access attempts are met with an audible buzzer alert.

This project is ideal for automating access control for gates, office doors, or other restricted areas.

Objectives

• Automate access control using fingerprint authentication.
• Deny entry to unauthorized individuals and alert them with a buzzer.
• Provide seamless and secure access for enrolled users.

Hardware Requirements

• Blink Board: Acts as the primary controller, processing fingerprint data and managing system responses.
• Fingerprint Sensor: Handles enrollment and verification of fingerprints.
• Relay Module: Controls the locking mechanism of the gate/door.
• Buzzer: Alerts unauthorized users attempting access.

How it works

• Fingerprint Enrollment: Fingerprints are stored directly on the fingerprint sensor during setup.
• Authentication:When a user places their finger on the sensor, the system verifies the fingerprint against the stored database.
• If matched, the relay is activated, opening the gate/door for 5 seconds.
• If unmatched, the buzzer sounds to indicate unauthorized access.
• Auto-lock: After 5 seconds, the relay deactivates, locking the gate/door

Circuit Diagram

CONNECTING 20by4 I2C LCD WITH BLINK BOARD

close up of fingerprint sensor connection to blink board

This fingerprint-based gate access system demonstrates the potential of biometric authentication for secure and automated access control. Using the Blink Board and a fingerprint sensor, you can enhance security while maintaining simplicity and cost-efficiency. You can modify the project further and use a real-time clock (RTC) module to allow access only during specified times