T34. SKETCH SENSOR JARAK ULTRASONIK RESPON 3 LED

 

SKETCH YANG PERLU DIKETIK:

//sensor ultrasonik
//respon 3 lampu menyala berurutan

const int trigpin = 10;
const int echopin = 9;
const int led1 = 2;
const int led2 = 4;
const int led3 = 7; 

long durasi;
int jarak;
 void setup() {
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  Serial.begin(9600);
  long durasi = 0;
}
void loop() {
  
  digitalWrite(trigpin, LOW);
  delayMicroseconds(2);
   
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin, LOW);
   
  durasi = pulseIn(echopin, HIGH);
   
  jarak = durasi * 0.034 / 2;
   
  Serial.print("Jarak: ");
  Serial.print(jarak);
  Serial.println(" cm");
  delay(50);
  if(jarak<=50){
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    delay(100);
  }
  else if((jarak>50)&(jarak<=100)){
    digitalWrite(led1,LOW);
    digitalWrite(led2,HIGH);
    digitalWrite(led3,LOW);
    delay(100);
  }
  else if((jarak>100)&(jarak<=150)){
    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,HIGH);
    delay(100);
  }
  else{
    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW); 
  }
}