simple arduino coding

copy codes and upload in arduino IDE that's all

coding:

coding for ultrasonic sensor 

#define trig 5
#define echo 6
void setup() {
  Serial.begin(9600);
  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);
  pinMode(13,OUTPUT);
}

void loop() {
  long duration , distance;
  
  digitalWrite(trig,LOW);
  delay(2);
  digitalWrite(trig,HIGH);
  delay(2);
  digitalWrite(trig,LOW);
  
  duration= pulseIn(echo,HIGH);
  distance=(duration/2)/29.1;

  if(distance <= 10)
  {
    digitalWrite(13,HIGH);
  }
  else
  {
    digitalWrite(13,LOW);
  }
  
 delay(1000);
  

}
---------------------------***********----------------------------***************------------------

This is the codings for ultrasonic sensor... 
For reference visit my youtube channel..
youtube video ultrasonic sensor video part2

coding for relay 

void setup() {
 pinMode(13,OUTPUT);
 pinMode(12,OUTPUT);
 pinMode(11,OUTPUT);
 pinMode(10,OUTPUT);
 Serial.begin(9600);
}

void loop() {
 digitalWrite(13,HIGH);
 Serial.println("channl 1 is on");
 delay(1000);
 digitalWrite(13,LOW);
 digitalWrite(12,HIGH);
 Serial.println("channl 2 is on");
 delay(1000);
 digitalWrite(12,LOW);
 digitalWrite(11,HIGH);
 Serial.println("channl 3 is on");
 delay(1000);
 digitalWrite(11,LOW);
 digitalWrite(10,HIGH);
 Serial.println("channl 4 is on");
 delay(1000);
 digitalWrite(10,LOW);

}
---------------------------***********----------------------------***************------------------

This is the codings for relay... 
For reference visitmy youtube channel..
youtube videos arduino with relay simple codings

coding for bluetooth

void setup() {
  pinMode(13,OUTPUT);
 Serial.begin(9600);
}

void loop() {
  if(Serial.available()>0)
  {
    int val=Serial.read();
    delay(20);
    if(val=='1')
    {
      digitalWrite(13,HIGH);
      delay(20);
    }
     if(val=='0')
    {
      digitalWrite(13,LOW);
      delay(20);
    }
  }
}
---------------------------***********----------------------------***************------------------



this is the codings for bluetooth module(HC-06)...
For reference visitmy youtube channel..
youtube videos what is bluetooth
youtube videos for bluetooth programming



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