How to Make an Automated Electric Anti-Theft System

Project Title

Design and Construction of an Automated Electric Anti-Theft Security System Using Arduino and Motion Sensors

Project Images

System Components

Main Hardware Used in the Project

Working Principle of the System

Motion Detection → Processing → Alarm → SMS Alert

Security Light Activation

Automatic Illumination During Intrusion

Construction and Assembly

Building the Automated Anti-Theft System

Applications of the Project

Where the System Can Be Used

Future Improvements

Advanced Smart Security Features

Operational Flow Diagram (Insert in Report)

System Powered ON
        │
        ▼
Monitor PIR Sensor
        │
        ▼
Motion Detected?
   ┌────┴────┐
   │         │
  NO        YES
   │         │
Continue   Activate Alarm
Monitoring     │
               ▼
        Turn ON Security Light
               │
               ▼
          Send SMS Alert
               │
               ▼
         Continue Monitoring

Introduction

The Automated Electric Anti-Theft System is a smart security device that detects unauthorized entry and automatically activates an alarm, lights, and notification system. The project can be used in homes, schools, shops, offices, and farms to prevent theft.

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Objectives

1. To detect unauthorized movement automatically.
2. To trigger an alarm when intrusion occurs.
3. To activate security lights automatically.
4. To send notifications to the owner.
5. To improve security using affordable technology.

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Materials Required

Item	Quantity
Arduino Uno	1
PIR Motion Sensor	1
Buzzer/Siren	1
Relay Module	1
LED Security Light	1
GSM Module (SIM800L)	1
Jumper Wires	Several
Breadboard	1
12V Power Supply	1
Switch	1
Resistors	2
SIM Card	1

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System Components

6

Working Components

• PIR Sensor – Detects human movement.
• Arduino – Processes signals from sensors.
• Relay – Switches security lights ON.
• Buzzer – Produces alarm sound.
• GSM Module – Sends SMS alerts.
• LED Light – Illuminates the area.

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Circuit Diagram

PIR Sensor
    │
    ▼
Arduino Uno
 ├──► Buzzer
 ├──► Relay ─► Security Light
 └──► GSM Module ─► SMS Alert

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Construction Procedure

Step 1: Connect the PIR Sensor

• VCC → 5V Arduino
• GND → GND Arduino
• OUT → Digital Pin 2

Step 2: Connect Buzzer

• Positive terminal → Pin 8
• Negative terminal → GND

Step 3: Connect Relay Module

• IN → Pin 7
• VCC → 5V
• GND → GND

Step 4: Connect GSM Module

• TX → Arduino RX
• RX → Arduino TX
• Connect SIM card

Step 5: Upload Arduino Program

Program Arduino to:

1. Monitor PIR sensor.
2. Trigger buzzer when motion is detected.
3. Switch ON security lights.
4. Send SMS alert.

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Operational Flow Chart

System Powered ON
        │
        ▼
Monitor PIR Sensor
        │
        ▼
Motion Detected?
   ┌────┴────┐
   │         │
  NO        YES
   │         │
Continue   Activate Alarm
Monitoring     │
               ▼
        Turn ON Security Light
               │
               ▼
          Send SMS Alert
               │
               ▼
         Continue Monitoring

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Sample Arduino Code

int pir = 2;
int buzzer = 8;
int relay = 7;

void setup() {
pinMode(pir, INPUT);
pinMode(buzzer, OUTPUT);
pinMode(relay, OUTPUT);
}

void loop() {

if(digitalRead(pir)==HIGH){

digitalWrite(buzzer,HIGH);
digitalWrite(relay,HIGH);

delay(5000);

digitalWrite(buzzer,LOW);
digitalWrite(relay,LOW);
}

}

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Testing Procedure

Test	Expected Result
No movement	System remains idle
Motion detected	Alarm sounds
Motion detected	Light turns ON
GSM connected	SMS sent

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Expected Results

• Intruders detected automatically.
• Alarm activates immediately.
• Security lights illuminate the area.
• Owner receives warning message.
• Reduced theft incidents.

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Possible Improvements

1. Add fingerprint authentication.
2. Add face recognition camera.
3. Integrate with mobile application.
4. Add solar charging system.
5. Store intrusion records in cloud database.
6. Use AI to distinguish humans from animals.

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Applications

• Homes
• Schools
• Shops
• Warehouses
• Farms
• Offices
• Laboratories

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Conclusion

The Automated Electric Anti-Theft System provides a reliable, low-cost, and intelligent method of protecting property from unauthorized access. By combining motion detection, alarms, lighting, and GSM communication, the system enhances security while reducing the need for continuous human monitoring.