e all remember the iconic 80s TV series Knight Rider. One of the most memorable features was the car’s signature sweeping LED flash. For this project, I used an Arduino UNO to recreate that display using 10 LEDs. While there are many ways to program the Arduino microchip, here is the approach I took to get that classic 'scanner' look.
Knight Rider 1
void setup() {
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
for(int i=1;i<12;i=i+1)
{
digitalWrite(i,HIGH);
digitalWrite(i+1,HIGH);
digitalWrite(i+2,HIGH);
delay(100);
digitalWrite(i,LOW);
digitalWrite(i+1,LOW);
digitalWrite(i+2,LOW);
}
for(int i =12 ;i>=1;i--)
{
digitalWrite(i,HIGH);
digitalWrite(i-1,HIGH);
digitalWrite(i-2,HIGH);
delay(100);
digitalWrite(i,LOW);
digitalWrite(i-1,LOW);
digitalWrite(i-2,LOW);
}
}
Knight Rider 2
int pinArray[] = {2, 3, 4, 5, 6, 7,8,9,10,11};
int delayTime = 100;
void setup() {
// put your setup code here, to run once:
for (int i=0;i<11;i++) {
pinMode(pinArray[i], OUTPUT);
}
}
void loop() {
for (int i=2;i<11;i++) {
digitalWrite(pinArray[i], HIGH);
digitalWrite(pinArray[i+1], HIGH);
digitalWrite(pinArray[i+2], HIGH);
delay(delayTime);
digitalWrite(pinArray[i], LOW);
digitalWrite(pinArray[i+1], LOW);
digitalWrite(pinArray[i+2], LOW);
}
for (int i=11;i>=2;i--) {
digitalWrite(pinArray[i],HIGH);
digitalWrite(pinArray[i-1],HIGH);
digitalWrite(pinArray[i-2],HIGH);
delay(delayTime);
digitalWrite(pinArray[i],LOW);
digitalWrite(pinArray[i-1],LOW);
digitalWrite(pinArray[i-2],LOW);
}
}
