Arduino Code for ultrsonic RADAR

Micocontroller,  ROBOTICS,  Arduino Uno Board Project Example fro School and Science exibiation and College Projects.

#define echoPin 7
#define trigPin 8
#define LEDPin 13
int relay1=2;
int relay2=3;
int relay3=4;
int relay4=5;
int maximumRange = 200;
int minimumRange = 0;
long duration, distance;

void setup() {
 Serial.begin (9600);
 pinMode(trigPin, OUTPUT);
 pinMode(echoPin,  OUTPUT);
  pinMode(relay1,  OUTPUT);
   pinMode(relay2,  OUTPUT);
    pinMode(relay3,  OUTPUT);
     pinMode(relay4, OUTPUT);
}

void loop() {

 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);

 digitalWrite(trigPin, LOW);
 duration = pulseIn(echoPin, HIGH);


 distance = duration/58.2;

 if (distance >25)

 {
   digitalWrite(relay1,HIGH);
   delay(5000);
   digitalWrite(relay1,LOW);
   digitalWrite(relay2,HIGH);
   delay(5000);
 
   digitalWrite(relay2,LOW);
   digitalWrite(relay3,HIGH);
   delay(5000);
 
   digitalWrite(relay3,LOW);
   digitalWrite(relay4,HIGH);
   delay(5000);
 
   digitalWrite(relay4,LOW);

   delay(5000);
 
 }

 delay(50);
}


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#include <Servo.h>

Servo myservo;


int pos = 0; 

void setup()
{
  Serial.begin(9600);
  myservo.attach(9);
}

void loop()
{
  int sensorValue = analogRead(A0);

Serial.println(sensorValue);
  if(sensorValue>850)
  {
    myservo.write(0); 
      delay(5000);                               
  }
 else
 {
  myservo.write(90);
           
}
}

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void setup()
{
Serial.begin(9600);
}

void loop()
{
  int state = analog Read(A0) ;
  int state2 = analog Read(A1) ;
  int state3 = analog Read(A3) ;
Serial. println ( state ) ;
delay ( 1000);
Serial. println ( state2 ) ;
delay ( 1000 );
Serial. println ( state3 ) ;
delay ( 1000 )  ;
}


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