605雙向跑馬燈

 

// 雙向跑馬燈

const int leds[] = {2, 3, 4}; // LED 腳位陣列

const int numLeds = sizeof(leds) / sizeof(leds[0]);

void setup() {

  for (int i = 0; i < numLeds; i++) {

    pinMode(leds[i], OUTPUT);

  }

}

void loop() {

  // 從左到右

  for (int i = 0; i < numLeds; i++) {

    digitalWrite(leds[i], HIGH);

    delay(200);

    digitalWrite(leds[i], LOW);

  }

  // 從右到左

  for (int i = numLeds - 2; i > 0; i--) { // 避免重複最左邊 LED

    digitalWrite(leds[i], HIGH);

    delay(200);

    digitalWrite(leds[i], LOW);

  }

}