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Showing posts from September, 2025

Laser Security System

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Laser Security System Using Arduino Laser Security System Using Arduino This project creates a laser-based security system that triggers an audible and visual alarm when the laser beam is interrupted. The system uses a laser module and LDR sensor to detect intrusions, with a buzzer and LED providing immediate feedback. The alarm features a distinctive "tuuuuu tuuuuu" pattern that lasts for 5 seconds when triggered. How the System Works Laser Module emits a continuous beam of light directed at the LDR sensor LDR (Light Dependent Resistor) detects the laser beam and maintains system in standby mode When the beam is interrupted: System triggers a 5-second alarm cycle Buzzer sounds with a distinctive "tuuuuu tuuuuu" pattern (700ms on, 300ms off) LED flashes in sync with the buzzer for visual indication After 5 seconds: S...