Arduino Traffic Light Tutorial

in this tutorial u will be shown how to make a simple traffic light with arduino uno and led's

please do visit our site its new made. fountainoftoughts.net

one green LED

one yellow LED

one red LED

three 220 ohm resistors

wires

bread board

Arduino uno

connect the components like shown in the picture. connect the cathode pin of LED to one of the resistors and connect the resistor to ground. and connect the anode’s to the arduino ports .

void setup() {

pinMode(13, OUTPUT);

pinMode(12, OUTPUT);

pinMode(11, OUTPUT);

}

void loop() {

digitalWrite(13, HIGH);

delay(3000);

digitalWrite(13, LOW);

digitalWrite(12, HIGH);

delay(1000);

digitalWrite(12, LOW);

digitalWrite(11, HIGH);

delay(3000);

digitalWrite(11, LOW);

}