Cylon Centurion / KITT

README.md

Cylon Centurion / KITT in Arduino

About

This Arduino sketch controls a series of ten leds similar to the visor of a Cylon Centurion or Knight Rider's car, KITT. Pressing the button cycles through different speed settings.

The circuitry on a breadboard

The ten leds are connected to digital pins 1 through 10 and each have a 220Ω resistor. The button has a 10KΩ pull-down resistor.

Dependencies

I use the excellent Bounce library to debounce the button.

cylon.ino

#include <Bounce.h>
const int ledOne    = 1;
const int ledTwo    = 2;
const int ledThree  = 3;
const int ledFour   = 4;
const int ledFive   = 5;
const int ledSix    = 6;
const int ledSeven  = 7;
const int ledEight  = 8;
const int ledNine   = 9;
const int ledTen    = 10;
const int button = 11;
int delayTime = 300;
long lastMillis;
long currentMillis;
Bounce bouncer = Bounce(button,5);

void setup() {
    pinMode(ledOne, OUTPUT);
    pinMode(ledTwo, OUTPUT);
    pinMode(ledThree, OUTPUT);
    pinMode(ledFour, OUTPUT);
    pinMode(ledFive, OUTPUT);
    pinMode(ledSix, OUTPUT);
    pinMode(ledSeven, OUTPUT);
    pinMode(ledEight, OUTPUT);
    pinMode(ledNine, OUTPUT);
    pinMode(ledTen, OUTPUT);
    pinMode(button, INPUT);
    lastMillis = millis();
}

void adjustDelayTime(){
    bouncer.update();
    if (bouncer.risingEdge()) {
        delayTime = delayTime - 100;
        if (delayTime <= 0) delayTime = 300;
    }
}

void delayUsingMillis() {
    currentMillis = millis();
    while ((currentMillis - lastMillis) < delayTime) {
        currentMillis = millis();
        adjustDelayTime();
    }
    lastMillis = millis();
}

void loop() {
    digitalWrite(ledOne, HIGH);
    delayUsingMillis();
    digitalWrite(ledOne, LOW);
    digitalWrite(ledTwo, HIGH);
    delayUsingMillis();
    digitalWrite(ledTwo, LOW);
    digitalWrite(ledThree, HIGH);
    delayUsingMillis();
    digitalWrite(ledThree, LOW);
    digitalWrite(ledFour, HIGH);
    delayUsingMillis();
    digitalWrite(ledFour, LOW);
    digitalWrite(ledFive, HIGH);
    delayUsingMillis();
    digitalWrite(ledFive, LOW);
    digitalWrite(ledSix, HIGH);
    delayUsingMillis();
    digitalWrite(ledSix, LOW);
    digitalWrite(ledSeven, HIGH);
    delayUsingMillis();
    digitalWrite(ledSeven, LOW);
    digitalWrite(ledEight, HIGH);
    delayUsingMillis();
    digitalWrite(ledEight, LOW);
    digitalWrite(ledNine, HIGH);
    delayUsingMillis();
    digitalWrite(ledNine, LOW);
    digitalWrite(ledTen, HIGH);
    delayUsingMillis();
    digitalWrite(ledTen, LOW);
    digitalWrite(ledNine, HIGH);
    delayUsingMillis();
    digitalWrite(ledNine, LOW);
    digitalWrite(ledEight, HIGH);
    delayUsingMillis();
    digitalWrite(ledEight, LOW);
    digitalWrite(ledSeven, HIGH);
    delayUsingMillis();
    digitalWrite(ledSeven, LOW);
    digitalWrite(ledSix, HIGH);
    delayUsingMillis();
    digitalWrite(ledSix, LOW);
    digitalWrite(ledFive, HIGH);
    delayUsingMillis();
    digitalWrite(ledFive, LOW);
    digitalWrite(ledFour, HIGH);
    delayUsingMillis();
    digitalWrite(ledFour, LOW);
    digitalWrite(ledThree, HIGH);
    delayUsingMillis();
    digitalWrite(ledThree, LOW);
    digitalWrite(ledTwo, HIGH);
    delayUsingMillis();
    digitalWrite(ledTwo, LOW);
}