Arduino Traffic Light Tutorial

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

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Step 1: Things You Need

one green LED

one yellow LED

one red LED

three 220 ohm resistors

wires

bread board

Arduino uno

Step 2: Connect Components

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 .

Step 3: Arduino IDE Code

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);

}