This Security Circuit Can’t Be Fooled by Light! | Intruder Detection Circuit

#IntruderDetected #LM324IC #SecurityAlarm In this video, I have made a simple and powerful Infrared Security System / Intruder Detection Circuit using LM324 IC and easily available electronic components.
This Security Circuit Can’t Be Fooled by Light! Intruder Detection Circuit make at home
This circuit works on an IR transmitter and IR receiver principle. When the infrared beam is interrupted by any object or person, the circuit instantly detects the intrusion and turns ON an LED, buzzer, or relay.

🔧 Components Used

LM324 IC

Infrared Transmitter Diode (from remote control)

Infrared Receiver Diode

50k Variable Resistor

2M Variable Resistor

470Ω Resistor (1/4W)

12V DC Battery / Power Supply

⚙️ How It Works

The IR transmitter continuously sends an infrared beam.

The IR receiver detects the beam.

When someone crosses the beam, the signal changes.

LM324 IC compares the signal and activates the output.

You can use LED, buzzer, relay, or alarm as output.

This circuit is not affected by torch light or room light, making it very reliable.
I have tested this circuit up to 10 meters, and it works perfectly.

🏠 Applications

Home security system

Door or gate security

Shop security

Garage or boundary protection

DIY alarm projects

📌 For your convenience, the circuit diagram is included inside the video.

👉 If you want a relay version, long-range upgrade, or Arduino version, comment below.

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