Arduino - 可變電阻 + 跑馬燈(Variable Resistor + Marquee)


目的：


以可變電阻來改變LED跑馬燈的速度

 速度區間：
1.電阻值0-255 >> DELAY 4000ms

 2.電阻值256-511 >> DELAY 1000ms

 1.電阻值512-767 >> DELAY 500ms

 1.電阻值768-1023 >> DELAY 100ms

成果：


Arduino Code：

  1. const byte LED1 = 8;
  2. const byte LED2 = 9;
  3. const byte LED3 = 10;
  4. const byte LED4 = 11;
  5. const byte Cds = A0; //　電阻
  6. int val;
  7.  
  8. void setup() {
  9.     pinMode(LED1, OUTPUT);
  10.     pinMode(LED2, OUTPUT);
  11.     pinMode(LED3, OUTPUT);
  12.     pinMode(LED4, OUTPUT);
  13.     Serial.begin(9600);
  14. }
  15.  
  16. void loop() {
  17.     val = analogRead(A0);
  18.     if (val <= 255) {
  19.         digitalWrite(LED1, HIGH);
  20.         digitalWrite(LED2, LOW);
  21.         digitalWrite(LED3, LOW);
  22.         digitalWrite(LED4, LOW);
  23.         delay(4000);
  24.         digitalWrite(LED1, LOW);
  25.         digitalWrite(LED2, HIGH);
  26.         digitalWrite(LED3, LOW);
  27.         digitalWrite(LED4, LOW);
  28.         delay(4000);
  29.         digitalWrite(LED1, LOW);
  30.         digitalWrite(LED2, LOW);
  31.         digitalWrite(LED3, HIGH);
  32.         digitalWrite(LED4, LOW);
  33.         delay(4000);
  34.         digitalWrite(LED1, LOW);
  35.         digitalWrite(LED2, LOW);
  36.         digitalWrite(LED3, LOW);
  37.         digitalWrite(LED4, HIGH);
  38.         delay(4000);
  39.         Serial.println(val);
  40.     }
  41.     else if (val > 255 && val <= 511) {
  42.         digitalWrite(LED1, HIGH);
  43.         digitalWrite(LED2, LOW);
  44.         digitalWrite(LED3, LOW);
  45.         digitalWrite(LED4, LOW);
  46.         delay(1000);
  47.         digitalWrite(LED1, LOW);
  48.         digitalWrite(LED2, HIGH);
  49.         digitalWrite(LED3, LOW);
  50.         digitalWrite(LED4, LOW);
  51.         delay(1000);
  52.         digitalWrite(LED1, LOW);
  53.         digitalWrite(LED2, LOW);
  54.         digitalWrite(LED3, HIGH);
  55.         digitalWrite(LED4, LOW);
  56.         delay(1000);
  57.         digitalWrite(LED1, LOW);
  58.         digitalWrite(LED2, LOW);
  59.         digitalWrite(LED3, LOW);
  60.         digitalWrite(LED4, HIGH);
  61.         delay(1000);
  62.         Serial.println(val);
  63.     }
  64.     else if (val > 511 && val <= 767) {
  65.         digitalWrite(LED1, HIGH);
  66.         digitalWrite(LED2, LOW);
  67.         digitalWrite(LED3, LOW);
  68.         digitalWrite(LED4, LOW);
  69.         delay(500);
  70.         digitalWrite(LED1, LOW);
  71.         digitalWrite(LED2, HIGH);
  72.         digitalWrite(LED3, LOW);
  73.         digitalWrite(LED4, LOW);
  74.         delay(500);
  75.         digitalWrite(LED1, LOW);
  76.         digitalWrite(LED2, LOW);
  77.         digitalWrite(LED3, HIGH);
  78.         digitalWrite(LED4, LOW);
  79.         delay(500);
  80.         digitalWrite(LED1, LOW);
  81.         digitalWrite(LED2, LOW);
  82.         digitalWrite(LED3, LOW);
  83.         digitalWrite(LED4, HIGH);
  84.         delay(500);
  85.         Serial.println(val);
  86.     }
  87.     else if (val > 768 && val <= 1023) {
  88.         digitalWrite(LED1, HIGH);
  89.         digitalWrite(LED2, LOW);
  90.         digitalWrite(LED3, LOW);
  91.         digitalWrite(LED4, LOW);
  92.         delay(100);
  93.         digitalWrite(LED1, LOW);
  94.         digitalWrite(LED2, HIGH);
  95.         digitalWrite(LED3, LOW);
  96.         digitalWrite(LED4, LOW);
  97.         delay(100);
  98.         digitalWrite(LED1, LOW);
  99.         digitalWrite(LED2, LOW);
  100.         digitalWrite(LED3, HIGH);
  101.         digitalWrite(LED4, LOW);
  102.         delay(100);
  103.         digitalWrite(LED1, LOW);
  104.         digitalWrite(LED2, LOW);
  105.         digitalWrite(LED3, LOW);
  106.         digitalWrite(LED4, HIGH);
  107.         delay(100);
  108.         Serial.println(val);
  109.     }
  110. }

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