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In this Blog, We going to completely learn about, How to Interface PIR Sensor with Arduino.?

1. A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

2. A few sensors, for example, the PIR, have a jumper that decides how the yield acts when movement is recognized. In one mode, the yield stays HIGH while movement is identified, or it can be set so that the yield goes HIGH quickly and after that LOW when activated. The connection diagram is shown.            

PROGRAM:

#include<LiquidCrystal.h>

LiquidCrystal lcd(2,3,4,5,6,7);

void setup() {                                                                    

  // put your setup code here, to run once:

pinMode(9,INPUT);                           

pinMode(13,OUTPUT);

Serial.begin(115200);

lcd.begin(16,2);

lcd.clear();

lcd.SetCursor(0,0);

lcd.print(“welcome”);

}

void loop() {

  // put your main code here, to run repeatedly:

if(digitalRead(9)==HIGH)

{

digitalWrite(13,HIGH);

  Serial.print(“sensor detected”);

lcd.clear();

lcd.SetCursor(0,0);

lcd.print(“sen detected”);

delay(1000);}

else

{

  digitalWrite(13,LOW);

  Serial.print(“sensor not detected”);

lcd.SetCursor(0,1);

lcd.print(“not detected”);

delay(1000);

}

}

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