Make Led traffic light using Arduino uno.

Step 1: Parts Required

1. Arduino UNO
2. 3 pc. LED (red, green, yellow)
3. Breadborad
4. Wire jumper

Step 2: Hardware Connection

Connet Your anrduino with led as shown in figure.

Step 3: Programming

Copy and paste this code to Arduino programming software on pc.

int green = 10;
int amber = 11;
int red = 12;

void setup(){
pinMode (green,OUTPUT);
pinMode(amber,OUTPUT);
pinMode(red,OUTPUT);
}

void loop()
{
digitalWrite(green,HIGH);
delay(1000);
digitalWrite(green,LOW);
digitalWrite(amber,HIGH);
delay(1000);
digitalWrite(amber,LOW);
digitalWrite(red,HIGH);
delay(1000);
digitalWrite(red,LOW);
}