• Cảm Biến Chuyển Động PIR HC-SR501
• Module 1 Relay 5V
• SFM-27 Còi Báo Động
• Arduino

//define the pins
int Load = A1;
int PIR = A0;
int pirState = 2;
 
void setup() {
  //define the Relay pin as output
  pinMode(Load, OUTPUT);
  pinMode(pirState, OUTPUT);
  Serial.begin(9600);
  //define the sensor pin as input
  pinMode(PIR, INPUT);
}
 
void loop() {
  //using the digitalRead function we will read the signal of the sensor
  int value = digitalRead(PIR);
  //if its high or if an any object is detected it will activate the Relay Module
  if (value == HIGH){
  Serial.println("Phat hien chuyen dong !!!");
  bat_Den();
  digitalWrite(pirState, HIGH); //For activating the Relay we will send a LOW as the Relay input pin works inversely.
   delay(1000);
  }
  else {
    //digitalWrite(LED, LOW);
  tat_Den();
  digitalWrite(pirState, LOW);
  Serial.println("Khong phat hien chuyen dong");
  delay(1000);
  }
}
void coi_bao()
{
  digitalWrite(Load, HIGH);
  delay(250);
  digitalWrite(Load, LOW);
  delay(250);
}
void bat_Den(){
  digitalWrite(Load, HIGH);
}
void tat_Den(){
  digitalWrite(Load, LOW);
}
 

HC-SR501 cam bien chuyen dong pir, tlc47 truong cong ly, trương công lý