Traffic Light Controller

CIRCUIT:
(4 Way Traffic Light Controller)

Circuit is pretty simple, so I won't be posting a picture of the schematic. Still if you are having any trouble see the pictures of the original circuit below:

(1) The North - South LEDs are the same, so they will be connected together and then the output would go to the assign pins (See the code, to know which pins I used to the LEDs).
 - The Red led to Pin 2
 - The Yellow led to Pin 3
 - The Green led to Pin 4

(2) Same goes for the East - West LEDs.
 - The Red led to Pin 6
 - The Yellow led to Pin 7
 - The Green led to Pin 8

(3) Make sure to use resistor with every single LED to prevent it from any high current damage.

(4) I included the switch to turn ON and OFF the traffic lights (This step is optional).

CODE:

// 4 Way Traffic Light Controller

// Programmed by, Umar Rao

// For Circuit Schematic go to http://arduinocoder.blogspot.com

int redNS = 2;

int yellowNS = 3;

int greenNS = 4;

int redEW = 6;

int yellowEW = 7;

int greenEW = 8;

void setup() {

  

pinMode (redNS, OUTPUT);

pinMode (yellowNS, OUTPUT);

pinMode (greenNS, OUTPUT);

pinMode (redEW, OUTPUT);

pinMode (yellowEW, OUTPUT);

pinMode (greenEW, OUTPUT);

}

void loop() { 

    

digitalWrite(redNS, HIGH);

digitalWrite(greenEW, HIGH);

delay(8000);

digitalWrite(redNS, LOW);

digitalWrite(greenEW, LOW);

digitalWrite(greenNS, HIGH);

digitalWrite(yellowEW, HIGH);

delay(1000);

digitalWrite(yellowEW, LOW);

digitalWrite(redEW, HIGH);

delay(7000);

digitalWrite(greenNS, LOW);

digitalWrite(yellowNS, HIGH);

delay(1000);

digitalWrite(yellowNS, LOW);

digitalWrite(redEW, LOW);

}