Laser Security Alarm System @KarthikProjects

Uploaded February 2019 | Updated September 2026, 1 week ago

Laser light security alarm

Here we use a light dependent resistor (LDR) light sensor for sensing laser light. The output of LDR is connected to BC548 transistor which drives a buzzer and LED. When the laser beam falls on LDR then the transistor is in OFF condition. When any obstacle crosses the laser beam then transistor is turned ON producing alarm sound.

GSM based Water Pump Control || SMS Controlled Agricultural Motor Starter

Parts of Circle Working Model || Property of Circle || Maths Project

Automatic Braking System to Prevent Vehicle Accidents

Wireless Power Transmission via Solar Power Satellite

Automatic Water Spray 💧💧Liquid Dispenser 🚿 Science Project

Groundnut Shell Removing Machine | Hand Operated Manual Peanut Sheller

IOT based Smart Grid Monitoring System 🔌💡| Electrical Power Measurement with Fault Detection

Door Open Alarm ♦ Science Working Model ♦ ECE mini project ♦ School Project

Underground Cable Fault Detection and Distance Locator using Arduino

Bed Wetting Alarm | Enuresis Alarm | Science Project Concept | Working Model #projectideas