Intrusion Detection Home Security System

My Intrusion Detection Home Security System

I've always wanted to protect my room when I'm not around. That simple desire sparked the idea for my project: a home-made intrusion detection security system built using an Arduino. My goal was to create something functional, affordable, and reliable — and something I could proudly say I made myself.

The system is based on a few key components: IR sensors, light sensors, a temperature sensor, a buzzer, and LED indicators. Here’s how it all works:

When the system is powered on, it can be placed in two main states: armed or disarmed.

In the armed state, the red LED turns on. The system becomes alert to changes in light, motion, and temperature. If an intruder passes in front of the IR sensor, or if the light level drops below a certain threshold (like someone covering the sensor), or there's an unusual temperature spike, the system detects it as a potential intrusion.

• In the armed state, the red LED turns on. The system becomes alert to changes in light, motion, and temperature. If an intruder passes in front of the IR sensor, or if the light level drops below a certain threshold (like someone covering the sensor), or there's an unusual temperature spike, the system detects it as a potential intrusion.

When an intrusion is detected, the yellow LED lights up, and a buzzer sounds an alert, warning anyone nearby. At the same time, a message saying "Intrusion Detected!" is printed on the serial monitor.

• When an intrusion is detected, the yellow LED lights up, and a buzzer sounds an alert, warning anyone nearby. At the same time, a message saying "Intrusion Detected!" is printed on the serial monitor.

In the disarmed state, the green LED is turned on, and the system stops monitoring for intrusions. The serial monitor displays "System Disarmed", confirming that the sensors are inactive and it’s safe to enter without triggering an alert.

• In the disarmed state, the green LED is turned on, and the system stops monitoring for intrusions. The serial monitor displays "System Disarmed", confirming that the sensors are inactive and it’s safe to enter without triggering an alert.

This project taught me a lot about sensor calibration, threshold setting, and how to handle real-time input from multiple components. More importantly, it gave me the satisfaction of solving a personal need using technology.

Now, whenever I leave my room, I know my Arduino-based system is quietly standing guard.