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：

const byte LED1 = 8;
const byte LED2 = 9;
const byte LED3 = 10;
const byte LED4 = 11;
const byte Cds = A0; //　電阻
int val;

void setup() {
    pinMode(LED1, OUTPUT);
    pinMode(LED2, OUTPUT);
    pinMode(LED3, OUTPUT);
    pinMode(LED4, OUTPUT);
    Serial.begin(9600);
}

void loop() {
    val = analogRead(A0);
    if (val <= 255) {
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(4000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, HIGH);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(4000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, HIGH);
        digitalWrite(LED4, LOW);
        delay(4000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, HIGH);
        delay(4000);
        Serial.println(val);
    }
    else if (val > 255 && val <= 511) {
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(1000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, HIGH);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(1000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, HIGH);
        digitalWrite(LED4, LOW);
        delay(1000);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, HIGH);
        delay(1000);
        Serial.println(val);
    }
    else if (val > 511 && val <= 767) {
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(500);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, HIGH);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(500);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, HIGH);
        digitalWrite(LED4, LOW);
        delay(500);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, HIGH);
        delay(500);
        Serial.println(val);
    }
    else if (val > 768 && val <= 1023) {
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(100);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, HIGH);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, LOW);
        delay(100);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, HIGH);
        digitalWrite(LED4, LOW);
        delay(100);
        digitalWrite(LED1, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
        digitalWrite(LED4, HIGH);
        delay(100);
        Serial.println(val);
    }
}