Traffic Light

• 1 LED(Red, Green, Yellow)
• 3 Arduino UNO (download)
• computer(with Arduno app!)
• program
• programmer

plug the LED(Green)into pins 13 (+) GND (-)

make sure the + and - are in the right way.

plug the LED(Green)into pins 13 (+) GND (-)

make sure the + and - are in the right way.

plug the LED(Green)into pins 13 (+) GND (-)

make sure the + and - are in the right way.

Copy and paste this code!

/*
Blink   Turns on an LED on for one second, then off for one second, repeatedly.
  Most Arduinos have an on-board LED you can control. On the Uno and   Leonardo, it is attached to digital pin 13. If you're unsure what   pin the on-board LED is connected to on your Arduino model, check   the documentation athttp://arduino.cc
  This example code is in the public domain.
  modified 8 May 2014   by Scott Fitzgerald  *
/ the setup function runs once when you press reset or power the board void setup() {   // initialize digital pin 13 as an output.   pinMode(13, OUTPUT); }
// the loop function runs over and over again forever void loop() {   digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)   delay(1000);              // wait for a second   digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW   delay(1000);              // wait for a second }

Blink Turns on an LED on for one second, then off for one second, repeatedly.

Most Arduinos have an on-board LED you can control. On the Uno and Leonardo, it is attached to digital pin 13. If you're unsure what pin the on-board LED is connected to on your Arduino model, check the documentation at http://arduino.cc

This example code is in the public domain.

modified 8 May 2014 by Scott Fitzgerald *

/ the setup function runs once when you press reset or power the board void setup() { // initialize digital pin 13 as an output. pinMode(13, OUTPUT); }

// the loop function runs over and over again forever void loop() { digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(13, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }