Multiple Blinking LED On The Arduino : 4 Steps - Instructables

Introduction: Multiple Blinking LED on the Arduino

By The Electrodog ShowMy WebsiteFollowMoreMore by the author: In this tutorial I will show you how to make multiple LEDs blink with Arduino. You will need three LEDs, jumper wires, breadboard, and Arduino.

Step 1: Program the Arduino

Now you will need to paste the following code into the Arduino software and upload it to the Arduino. int led = 13; int led2 = 12; int led3 = 11; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); pinMode(led2, OUTPUT); pinMode(led3, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) delay(100); // wait for a second digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(100); {digitalWrite(led2, HIGH); delay(100); digitalWrite(led2, LOW); delay(100);} {digitalWrite(led3, HIGH); delay(100); digitalWrite(led3, LOW); delay(100);}// wait for a second }

Step 2: Connecting GND

First connect a jumper wire from GND to the negative rail on the breadboard.

Step 3: Connecting the LEDs.

Then plug in the other jumper wires like this: First, plug a wire from 13 on the Arduino to the top row on the breadboard. Next, plug a wire from 12 on the Arduino to the top row on the breadboard. Then plug a wire from 11 on the Arduino to the top row on the breadboard. Space these out well. Use the picture to help you. Now connect a wire going from the negative rail to the right of the other wires on the breadboard. Lastly, put the longer leg of the Led (+) under the wire that goes to the Arduino. The shorter leg of the LED goes under the port that connects to the negative rail.

Step 4: Video of It Working