Interactive LED Chase Effect

Parts require:

10 5mm RED LEDs

10 Current Limiting Resistors

4.7KΩ Rotary Potentiometer

Enter The Code

byte ledPin[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}; // Create array for LED pins

int ledDelay; // delay between changes

int direction = 1;

int currentLED = 0;

unsigned long changeTime;

int potPin = 2; // select the input pin for the potentiometer

void setup() {

for (int x=0; x<10; x++) { // set all pins to output

pinMode(ledPin[x], OUTPUT); }

changeTime = millis();

}

void loop() {

ledDelay = analogRead(potPin); // read the value from the pot

if ((millis() - changeTime) > ledDelay) { // if it has been ledDelay ms since

last change

changeLED();

changeTime = millis();

}

}

void changeLED() {

for (int x=0; x<10; x++) { // turn off all LED's

digitalWrite(ledPin[x], LOW);

}

digitalWrite(ledPin[currentLED], HIGH); // turn on the current LED

currentLED += direction; // increment by the direction value

// change direction if we reach the end

if (currentLED == 9) {direction = -1;}

if (currentLED == 0) {direction = 1;}

}

NOTE:- here i've not used resistors because i am supplying needed current but you don't forget to use it. If you have any queries/problems regarding this project then let me know in comment section.