MOTION DETECTOR ( guideline ) 👇🏻👇🏻

📘 Motion Detector

1. Introduction 🌟

This project is a Motion Detector using Arduino. It detects movement using a PIR sensor and gives alert using LED and buzzer. It is useful in security systems.

Ye Arduino ka Motion Detector project hai. Ye PIR sensor se movement detect karta hai aur LED 💡 aur buzzer 🔔 se alert deta hai. Ye security ke liye useful hai.

2. Components 🧠

Arduino: Controls the whole project

PIR Sensor: Detects motion

LED: Shows light signal

Buzzer: Produces sound

Resistor: Controls current

Ohm: Unit of resistance

Arduino: Project ko control karta hai

PIR Sensor: Movement detect karta hai

LED: Light deti hai

Buzzer: Awaaz karta hai

Resistor: Current control karta hai

Ohm: Resistance ki unit

3. Connections 🔌

PIR → 5V, GND, D2

LED → D7 + Resistor → GND

Buzzer → D10 → GND

PIR → 5V, GND, D2

LED → D7 + Resistor → GND

Buzzer → D10 → GND

4. Arduino Code 💻

int pirSensor = 2;   // PIR OUT pin D2 pe lagao
int redLED = 7;
int greenLED = 6;
int buzzer = 10;

void setup() {
  pinMode(pirSensor, INPUT);
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(buzzer, OUTPUT);
  
  Serial.begin(9600);
}

void loop() {
  int motion = digitalRead(pirSensor);

  Serial.println(motion);

  if (motion == HIGH) {
    digitalWrite(redLED, HIGH);   // Red ON
    digitalWrite(greenLED, LOW);  // Green OFF
    tone(buzzer, 1000);           // Buzzer ON
  } 
  else {
    digitalWrite(redLED, LOW);
    digitalWrite(greenLED, HIGH);
    noTone(buzzer);               // Buzzer OFF
  }

  delay(100);
}

5. Working ⚙️

PIR detects motion → sends signal → Arduino turns ON LED & buzzer.

PIR motion detect karta hai → signal bhejta hai → LED aur buzzer ON ho jate hain.

6. Demo ⚡

7. Tutorial 🎥

8. Questions ❓

• What is Arduino?
• What is PIR sensor?
• Why resistor is used?
• What is LED?

• Arduino kya hai?
• PIR sensor kya hai?
• Resistor kyun use hota hai?
• LED kya hoti hai?