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​Arduino Project 048 - Human Body Infrared Detector and Relay Light

RonWang9个月前 (12-14)电子编程569

Project 48 Human Body Infrared Detector and Relay Light

Arduino Body Infrared Detector and Relay Light Circuit

/*
 * Coding by Ronwang 
 * This example code is in the public domain
 * Hardware Support by Autaba Website :https://www.autabaec.com
 * HC-SR501 PIR Sensor Works & Interface It With Arduino
 * https://lastminuteengineers.com/pir-sensor-arduino-tutorial/
 * Project 48 Human Body Infrared Detector and Relay Light
*/
int ledPin = 13;                // choose the pin for the LED
int inputPin = 8;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
 
void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input
  Serial.begin(9600);
}
 
void loop(){
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH)// check if the input is HIGH
  {            
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) 
{
      Serial.println("Motion detected!");// print on output change
      pirState = HIGH;
    }
  } 
  else 
  {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH)
{
      Serial.println("Motion ended!");// print on output change
      pirState = LOW;
    }
  }
}



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