MJ Light Up

A cool and interactive way to personalize and illuminate LEDs on your Arduino Uno.

BeginnerFull instructions provided2 hours712

Things used in this project

Hardware components

5 mm LED: Red

5 mm LED: Green

Resistor 221 ohm

Resistor 1k ohm

Jumper wires (generic)

SparkFun Pushbutton switch 12mm

Arduino UNO

Software apps and online services

Arduino IDE

Story

Our project is meant to be a cool illuminating idea that can be personalized for different people. We created this project initially for our Intro to Engineering Class. We decided to personalize this class project by adding our initials. Any one wanting to try new variations and patterns using LEDs on an Arduino Uno would have loads of fun.

Tutorial for Wiring:

Plug in two jumper wires connecting the breadboard to the Arduino Uno.

Place the LEDs in the specific order and design wanted.

Add the switch where there is excess space, preferably somewhere to the side.

Add the resistors to the cathode side of each row of LEDs that connect to the negative rows on the sides.

Add the jumper wires to the anode side of each row of LEDs that connect to the Arduino Uno.

Connect one jumper wire to one leg of the switch and the positive row on the side it is closest to and another jumper wire connected to the Arduino.

Add the resistor to the same row as the wire connected to the Arduino Uno that connects to the negative row on the side.

Refer to pictures for further explanation

Picture 1 shows first step.

Picture 2 shows step referring to switch.

Picture 3 shows how jumper wires are connected to the Arduino Uno from their row of LEDs.

Picture 4 shows how our project looked after finishing all of the wiring steps.

Code

Code

int switchState = 0;
void setup (){
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(2, INPUT);
}
void loop(){
  switchState = digitalRead(2);
  if (switchState == LOW) {
    //the button is not pressed
    digitalWrite(4, LOW); // green LED
    digitalWrite(5, LOW); // green LED
    digitalWrite(6, LOW); // green LED
    digitalWrite(8, LOW); // red LED
    digitalWrite(9, LOW); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED
  }
  else { // the button is pressed
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, LOW); // green LED
    digitalWrite(6, LOW); // green LED
    digitalWrite(8, LOW); // red LED
    digitalWrite(9, LOW); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, LOW); // green LED
    digitalWrite(8, LOW); // red LED
    digitalWrite(9, LOW); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, LOW); // red LED
    digitalWrite(9, LOW); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(500); // wait for half a second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, LOW); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, HIGH); // red LED
    digitalWrite(10, LOW); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, HIGH); // red LED
    digitalWrite(10, HIGH); // red LED
    digitalWrite(11, LOW); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, HIGH); // red LED
    digitalWrite(10, HIGH); // red LED
    digitalWrite(11, HIGH); // red LED
    digitalWrite(12, LOW); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, HIGH); // red LED
    digitalWrite(10, HIGH); // red LED
    digitalWrite(11, HIGH); // red LED
    digitalWrite(12, HIGH); // red LED
    digitalWrite(13, LOW); // red LED

    delay(250); // wait for a quarter second
    digitalWrite(4, HIGH); // green LED
    digitalWrite(5, HIGH); // green LED
    digitalWrite(6, HIGH); // green LED
    digitalWrite(8, HIGH); // red LED
    digitalWrite(9, HIGH); // red LED
    digitalWrite(10, HIGH); // red LED
    digitalWrite(11, HIGH); // red LED
    digitalWrite(12, HIGH); // red LED
    digitalWrite(13, HIGH); // red LED

    delay(1000); // wait for a second
  }
}