Project Details

Published February 11, 2025

DAIO - Die, All In One - The only die you'll ever need

DAIO is an unique die that contains all the dice needed to play RPG. This project was made for a college project study in UTFPR-PG, Brazil.

BeginnerWork in progress8 hours73

DAIO - Die, All In One - The only die you'll ever need

Things used in this project

Hardware components

Arduino Nano Every

Buzzer

SparkFun Pushbutton switch 12mm

ElectroPeak 0.96" OLED 64x128 Display Module

Story

In RPGs (Role-Playing Games), dice probability is used to determine outcomes that impact game progression. There are seven types of dice categorized by the number of faces: d4, d6, d8, d10, d12, d20, and d100 (where the d100 die is marked in tens and, together with the d10, determines any number between 1-100). It is also important to note that, in most cases, a higher number on a dice roll means a more beneficial outcome for the character.

The idea behind the DieAll-in-One (DAIO) project is to create a single die capable of simulating all types of dice. This would be useful for all players, as it replaces multiple dice with a single object—since losing dice is common—and could also serve as a fun and cool accessory for RPG sessions.

Project Details:

A selection button will allow the user to choose the type of die to roll.
To roll the die, it must be shaken, similar to how regular dice are used. A vibration sensor will detect when DAIO is moved in this way.
A display will show the rolled number, functioning like a roulette, and present the result of the roll.

Depending on the roll's outcome, the device will play different sound effects:

Bad roll → sad lose sound.
Average roll → simple beep indicating the result.
Good roll → victory sound.

Note: The Wokwi simulator does not have a vibration sensor to complete item 2. For this reason, the simulation replaces it with a pusshbutton to represent the shaking action.

Here is a clip of the simulation:

Test here: https://wokwi.com/projects/421961578368089089

Code

Code

#include <U8g2lib.h>

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);
const byte BUTTON_RODA = 10;
const byte BUTTON_SELECT = 7;
const byte SOUND_PIN = 6;

#define NOTE_C4  262
#define NOTE_E4  330
#define NOTE_G4  392
#define NOTE_C5  523

int lados=20;
int numero=1;

long timerR=0;
long timerS=0;

bool botaoEstadoAnteriorR = HIGH;  
bool botaoEstadoAnteriorS = HIGH;  


void setup() {
  pinMode(BUTTON_RODA, INPUT_PULLUP);
  pinMode(BUTTON_SELECT, INPUT_PULLUP);

  u8g2.begin();
  u8g2.clearBuffer();
  u8g2.drawRFrame(16,16,100,28,5);
  u8g2.setFont(u8g2_font_ncenB08_tr);  
  u8g2.drawStr(32, 32, "Roll the die!");
  u8g2.sendBuffer();

  Serial.begin(9600);
  randomSeed(analogRead(0));  
}

void loop() {
  
  

  if (digitalRead(BUTTON_RODA)==LOW) {
    timerR=millis();
    while(digitalRead(BUTTON_RODA)==LOW){}
    if(millis()-timerR<1000){

      rolar();

      desenharDado();

         
    }
    delay(100);
  }
    

if (digitalRead(BUTTON_SELECT)==LOW) {
    timerS=millis();
    while(digitalRead(BUTTON_SELECT)==LOW){}
    if(millis()-timerS<1000){
      mudar_dado();
    }

    desenharDado();

    delay(100);    
  }

}

void rolar(){
  for(int i=0;i<10;i++){
    numero=random(1,lados+1);
    if(numero==100){ numero=0; }
    desenharDado();         

    u8g2.sendBuffer();
    tone(SOUND_PIN, 800, 30);
    delay(i*50);
  }
  tocarSom(); 
}

void mudar_dado(){
  tone(SOUND_PIN, 1200, 100);
  if(lados==100){ lados=4; }
  else if(lados==4){ lados=6;}
  else if(lados==6){ lados=8; }
  else if(lados==8){ lados=10; }
  else if(lados==10){ lados=12; }
  else if(lados==12){ lados=20; }
  else if(lados==20){ lados=100; }
}

void desenharDado(){
  String str_num=String(numero);
  String str_lados="D"+String(lados);

  u8g2.clearBuffer();
  u8g2.drawRFrame(36,8,56,46,5);
  u8g2.setFont(u8g2_font_ncenB08_tr);
  u8g2.drawStr(0, 8, str_lados.c_str()); 
  u8g2.setFont(u8g2_font_ncenB24_tr);

  if(numero<=9){
      u8g2.drawStr(55, 43, str_num.c_str());
    }
    else{
      u8g2.drawStr(45, 43, str_num.c_str());
    }     

  u8g2.sendBuffer();
}

void tocarSom(){
  delay(100);
  if(numero==lados){
    tone(SOUND_PIN,NOTE_C4, 200);
    delay(250);
    tone(SOUND_PIN,NOTE_E4, 200);
    delay(250);
    tone(SOUND_PIN,NOTE_G4, 200);
    delay(250);
    tone(SOUND_PIN,NOTE_C5,400);
  }
  else if(numero==1){
    tone(SOUND_PIN,NOTE_C5, 300);
    delay(400);
    tone(SOUND_PIN,NOTE_G4, 300);
    delay(400);
    tone(SOUND_PIN,NOTE_E4, 300);
    delay(400);
    tone(SOUND_PIN,NOTE_C4,600);
  }
  else{
    tone(SOUND_PIN, 1000, 300);
  }
}

DAIO - Die, All In One - The only die you'll ever need

Things used in this project

Hardware components

Story

Project Details:

Schematics

Circuit - simulation

Code

Code

Credits

DANIEL DWULATKA BORCATH JESUS

Comments

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DAIO - Die, All In One - The only die you'll ever need

DAIO - Die, All In One - The only die you'll ever need

Things used in this project

Hardware components

Story

Project Details:

Schematics

Circuit - simulation

Code

Code

Credits

DANIEL DWULATKA BORCATH JESUS

Comments

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