DKS... Kelas Arduino bersambung... budak2 ni power...

 

Khamis. 30 Julai 2026... sesi belajar Arduino dengan Satsuki dan SHiwasu bersambung. den guna ultarsonic sensor dengan 4 bijik LED jek... coding den ajar guna chatGPT... bende 3 jam jadi 1 jam jek...

// HC-SR04

const int trigPin = 9;

const int echoPin = 10;

// LED

const int ledMerah = 2;

const int ledBiru = 3;

const int ledKuning = 4;

const int ledHijau = 5;

long duration;

float distance;

void setup() {

  Serial.begin(9600);

  pinMode(trigPin, OUTPUT);

  pinMode(echoPin, INPUT);

  pinMode(ledMerah, OUTPUT);

  pinMode(ledBiru, OUTPUT);

  pinMode(ledKuning, OUTPUT);

  pinMode(ledHijau, OUTPUT);

}

void loop() {

  // Menghasilkan denyutan ultrasonik

  digitalWrite(trigPin, LOW);

  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);

  // Membaca masa pantulan

  duration = pulseIn(echoPin, HIGH);

  // Mengira jarak dalam cm

  distance = duration * 0.0343 / 2;

  // Papar pada Serial Monitor

  Serial.print("Jarak: ");

  Serial.print(distance);

  Serial.println(" cm");

  // Tutup semua LED dahulu

  digitalWrite(ledMerah, LOW);

  digitalWrite(ledBiru, LOW);

  digitalWrite(ledKuning, LOW);

  digitalWrite(ledHijau, LOW);

  // Kawalan LED mengikut jarak

  if (distance <= 5) {

    digitalWrite(ledHijau, HIGH);

  }

  else if (distance <= 10) {

    digitalWrite(ledKuning, HIGH);

  }

  else if (distance <= 20) {

    digitalWrite(ledBiru, HIGH);

  }

  else if (distance <= 30) {

    digitalWrite(ledMerah, HIGH);

  }

  delay(100);

}