How to create knight rider light in Arduino Uno R3

01. List out the items needed for the circuit

Arduino Uno R3, Small Breadboard, 6 Red LEDs, 6 Resistors, Wires

02. Add Arduino Uno R3 and small bread board to the circuit

03.Place 6 LEDs in small breadboard in terminal strips with equal amount of distance between them

04.Place diodes in terminal strips to make connection to Upper and Lower terminals and place them connecting LEDs cathode.

05.Connect GRD pin in Arduino Uno R3 to breadboard’s negative side.

06.Make Connection between negative power rails and anode of the LEDs using wires.

07.Making Connection between resistors and digital pins in Arduino Uno R3

08.Coding part

First lights must be switch on and off from left to right and right to left until power terminated to Arduino Uno R3

int led1 = 7;
int led2 = 6;
int led3 = 5;
int led4 = 4;
int led5 = 3;
int led6 = 2;
const int delayTime = 50;

void setup()
{
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
}

void loop()
{

digitalWrite(led1, HIGH);
delay(delayTime);
digitalWrite(led1, LOW);
digitalWrite(led2, HIGH);
delay(delayTime);

digitalWrite(led2, LOW);
digitalWrite(led3, HIGH);
delay(delayTime);

digitalWrite(led3, LOW);
digitalWrite(led4, HIGH);
delay(delayTime);

digitalWrite(led4, LOW);
digitalWrite(led5, HIGH);
delay(delayTime);

digitalWrite(led4, LOW);
digitalWrite(led5, HIGH);
delay(delayTime);

digitalWrite(led5, LOW);
digitalWrite(led6, HIGH);
delay(delayTime);

digitalWrite(led6, LOW);
digitalWrite(led5, HIGH);
delay(delayTime);

digitalWrite(led5, LOW);
digitalWrite(led4, HIGH);
delay(delayTime);

digitalWrite(led4, LOW);
digitalWrite(led3, HIGH);
delay(delayTime);

digitalWrite(led3, LOW);
digitalWrite(led2, HIGH);
delay(delayTime);

digitalWrite(led2, LOW);
digitalWrite(led1, HIGH);
delay(delayTime);;

digitalWrite(led1, LOW);

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