Arduino的教學04-霹靂燈與陣列宣告練習

一、教學目標：將LED燈依序點亮
http://ming-shian.blogspot.tw/2013/05/ardunioled_5.html

二、接線圖

三、程式碼

const int analogPin = A0;   // the pin that the potentiometer is attached to
const int ledCount = 5;    // the number of LEDs
int ledPins[] = { 
7, 8,9,10,11};   // an array of pin numbers to which LEDs are attached


void setup() {
  // loop over the pin array and set them all to output:
  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    pinMode(ledPins[thisLed], OUTPUT); 
  }
}

void loop() {
// read the potentiometer:
 // int sensorReading = analogRead(analogPin);
  // map the result to a range from 0 to the number of LEDs:
  //int ledLevel = map(sensorReading, 0, 1023, 0, ledCount);

// loop over the LED array:
  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    digitalWrite(ledPins[thisLed], HIGH);
    delay(100);
    digitalWrite(ledPins[thisLed], LOW);
  } 

  for (int thisLed = ledCount-1; thisLed >= 0; thisLed--) {
    digitalWrite(ledPins[thisLed], HIGH);
    delay(100);
    digitalWrite(ledPins[thisLed], LOW);

    if (thisLed ==0){
      digitalWrite(ledPins[thisLed], HIGH );
      delay(100);
    }
  }
}

四、作業練習：
如何利用可變電阻來調整霹靂燈速？