Laser Perimeter Intruder Security Alarm with LDR Sensor & Active Buzzer

Educational Notes

This project is designed to be accessible to students from Class 4 to Masters level, with complexity scalable to match different age groups and skill levels.

Learning Objectives:

• Understand basic electronics and circuitry principles
• Learn sensor applications and data collection techniques
• Develop problem-solving skills through hands-on building and troubleshooting
• Apply programming concepts to control hardware and process data
• Connect projects to real-world Nepalese contexts and challenges

Adaptability:

• For younger students (Class 4-8): Focus on assembling pre-built circuits, observing results, and understanding basic concepts
• For intermediate students (Class 9-12): Modify code, experiment with parameters, and explore underlying principles
• For advanced students (Undergraduate/Masters): Optimize designs, add features, conduct research extensions, and analyze performance

Safety Note: Always supervise younger students when working with electricity, heat, or moving parts.

Designed specifically for Class 11 & 12 / Plus Two Physics Project, this hands-on project provides a complete step-by-step guide to building class 5 to 10 students creating high-decibel room security alarms.

Hardware Bill of Materials (In Stock at Ghumti Pasal):

• Microcontroller: Development Board (Arduino / ESP32)
• Sensors & Input: Specialized Sensor & Interface Module
• Actuators & Display: Relay / Motor / Display Module
• Power Supply: Rechargeable Battery or Adapter
• Jumper Wires: Male to Female Dupont Wires

Circuit Pinout & Wiring Connections:

Complete Source Code

void setup() {
  Serial.begin(9600);
}

void loop() {
  delay(1000);
}

Procurement & Delivery Across Nepal

All hardware components featured in this guide are available at Ghumti Pasal with fast Cash on Delivery across Nepal.