How to build a LED dice using Arduino Uno!

Parts you will need:

• Arduino UNO Board                                        x1
• LED (generic)                                                    x6
• Push Button                                                       x1
• Jumper Wires                                                   x10
• Resistors                                                            x7
• Breadboard                                                       x1

This project can be used for many different things, games, decision maker, random number generator, etc.

To make the project you must put the materials listed above in the pattern that is shown on the image below:

To get the project working you must install the Arduino software onto your computer.

link to the download: https://www.arduino.cc/en/software

Once downloaded you may enter this code into the website:

/* 
 Arduino Dice :)

 This example shows how to simulate throwing a dice with 6 LEDs.

 The circuit:
 * 6 LEDs attached to consecutive digital pins (with 220 Ohm resistors)
 * Button switch connected to digital pin (see circuit on https://www.arduino.cc/en/Tutorial/Button)

 Created 5 Jan 2017
 By Esther van der Stappen
 
 This example code is in the public domain.

 */

// set to 1 if we're debugging
#define DEBUG 0

// 6 consecutive digital pins for the LEDs
int first = 2;
int second = 3;
int third = 4;
int fourth = 5;
int fifth = 6;
int sixth = 7;

// pin for the button switch
int button = 12;
// value to check state of button switch
int pressed = 0;

void setup() {
  // set all LED pins to OUTPUT
  for (int i=first; i<=sixth; i++) {
    pinMode(i, OUTPUT);
  }
  // set buttin pin to INPUT
  pinMode(button, INPUT);
  
  // initialize random seed by noise from analog pin 0 (should be unconnected)
  randomSeed(analogRead(0));

  // if we're debugging, connect to serial 
  #ifdef DEBUG
    Serial.begin(9600);
  #endif

}

void buildUpTension() {
  // light LEDs from left to right and back to build up tension
  // while waiting for the dice to be thrown
  // left to right
  for (int i=first; i<=sixth; i++) {
    if (i!=first) {
      digitalWrite(i-1, LOW);
    }
    digitalWrite(i, HIGH);
    delay(100);
  }
  // right to left
  for (int i=sixth; i>=first; i--) {
    if (i!=sixth) {
      digitalWrite(i+1, LOW);
    }
    digitalWrite(i, HIGH);
    delay(100);
  }
}

void showNumber(int number) {
  digitalWrite(first, HIGH);
  if (number >= 2) {
    digitalWrite(second, HIGH);
  }
  if (number >= 3) {
    digitalWrite(third, HIGH);    
  }
  if (number >= 4) {
    digitalWrite(fourth, HIGH);    
  }
  if (number >= 5) {
    digitalWrite(fifth, HIGH);    
  }
  if (number == 6) {
    digitalWrite(sixth, HIGH);    
  }
}

int throwDice() {
  // get a random number in the range [1,6]
  int randNumber = random(1,7);
  
  #ifdef DEBUG
    Serial.println(randNumber);
  #endif
  
  return randNumber;
}

void setAllLEDs(int value) {
  for (int i=first; i<=sixth; i++) {
    digitalWrite(i, value);
  }
}

void loop() {
  // if button is pressed - throw the dice
  pressed = digitalRead(button);

  if (pressed == HIGH) {
    // remove previous number
    setAllLEDs(LOW);
    
    buildUpTension();
    int thrownNumber = throwDice();
    showNumber(thrownNumber);
  } 

}

Once uploaded the project should be working!

In conclusion, this project is fun to make! All the materials needed are included in the Arduino UNO R3 Super Starter Kit. Make sure to stay motivated, and have fun!

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