Creative Pradeep The Home Of Electronics

 VIDEO: https://youtu.be/-uGC-ngwZVo  CIRCUIT DIAGRAM: CODE: //Creative Pradeep The Home of Electronics// #include<Servo.h> Servo myservo; const int trigPin=3; const int echoPin=5;  long tmeduration; int distance; void setup() {   myservo.attach(9);   pinMode(trigPin,OUTPUT);   pinMode(echoPin,INPUT);   Serial.begin(9600);       } void loop() {   digitalWrite(trigPin,LOW);   delayMicroseconds(2);   digitalWrite(trigPin,HIGH);   delayMicroseconds(10);    digitalWrite(trigPin,LOW);    tmeduration=pulseIn(echoPin,HIGH); distance=(0.034*tmeduration)/2; if(distance<=20){      myservo.write(90);   }   else{     myservo.write(0);}      Serial.print("distance:");     Serial.println(distance);        delay(1);    } https://youtube.com/c/CreativePradeep