Arduino Based Motion sensor Alarm using PIR Sensor Module

Equipped with advanced PIR sensors, our alarm system detects changes in infrared radiation emitted by warm objects within its range, instantly triggering an audible alarm or sending notifications to your smartphone. With added features like lights and sirens, intruders won't stand a chance!

Ideal for residential and commercial environments, our motion sensor alarm system provides peace of mind, deters theft, and safe guards your loved ones. Explore the possibilities of enhanced security at robotshapers.com today! 

Motion sensor alarm is a system designed to detect and alert you of any unauthorized movement or entry into a protected area. It uses a Motion sensor (usually a PIR (passive infrared) sensor) to detect changes in infrared radiation emitted by hot objects within its range such as people. 

When the sound sensor detects motion, it triggers an audible security alarm or activates other alarms such as sending a notification to a smartphone or triggering a security. Some sound sensor sirens also have features like lights or sirens to further deter intruders.     

Motion Sensor Security Alarm is widely used in residential and commercial environments to increase security.They are often installed in entryways, windows or other sensitive areas to provide early warning of possible theft or unauthorized entry. These sirens provide peace of mind, protection and act as a deterrent against theft or intrusion, making them an essential part of any security system.

Components required:

1. Arduino Uno
2. LCD (16X2)
3. 10K variable resistor
4. PIR HC SR-501 motion sensor
5. 5V DC power supply
6. Single Relay Channel
7. Bulb
8. 220 V AC supply

PIR sensor:

The HCSR504 PIR (Passive Infrared) sensor is a widely used sensor popular with amateurs and DIYers. It is designed to detect human or animal movement within its range. The sensor works by detecting changes in infrared radiation emitted by objects in the field of view.

HCSR504 sensor module consists of pyroelectric infrared sensor, Fresnel lens and signal processing circuit. It has a wide measurement of up to 7 meters and a viewing angle of 120 degrees.
The sensor is easy to use as it operates at low voltage (usually 5V) and provides a digital output signal. When motion is detected, the sensor outputs a high signal (logic level 1); otherwise it gives a low signal (logic level 0).
HCSR504 PIR sensors are frequently used in many applications such as security systems, automatic lighting and energy saving products. It provides great results for motion detection, making it a popular choice for many electronic devices.

Code:

#include 
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
const int S = 8;//  sensor pin 
const int B= 9;// Buzzer pin  
int motion =0;// motion state
void setup() 
{
  Serial.begin(9600);
  lcd.begin(16,2);
  pinMode(S, INPUT);// Define SENSOR_PIN as Input
  pinMode(B, OUTPUT);// Define RELAY_PIN as OUTPUT 
}

void loop() 
{
  if(motion==0 && digitalRead(S)==HIGH)//  motion is detected
  {
    motion=1;
    delay(1500);
  }
  if(motion==1)//
  {
    digitalWrite(B,HIGH); 
    delay(500);
    digitalWrite(B,LOW); 
    delay(500);
  } 
}

Applications:

Motion sensor security alarms are widely used in many places to increase security and provide peace of mind. Some applications of motion sensor security alarms are:

1. Residential security: Motion sensor alarms are widely used in homes to prevent theft and intrusion. 
   
   
2. Security: Businesses use motion-sensor security alarms to protect their facilities during downtime. 
   
   
3. Outdoor Security: Motion sensor for outdoor use such as garden, driveway or parking lot.
   
   Property Protection: The motion sensor is used to protect valuables such as artwork, jewelry or electronics.
4. Personal Security: The motion sensor is good for personal security, especially for vulnerable people like the elderly or people  living alone. 

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