Digital Dice Circuit using Arduino Uno

Want to roll dice without touching it?

Make Digital Dice using Arduino Uno and with a LCD screen.

Press the button to get random number 1 to 6.

It works like real dice but uses electronics.

This is a simple and easy circuit.

Its a fun project for beginners.

Arduino Coding:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
int buttonPin = 2;
int buttonState = 0;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(buttonPin, INPUT);
  lcd.setCursor(0,0);
  lcd.print("Electronic Dice");
  delay(2000);
  lcd.clear();
}

void loop() {
  buttonState = digitalRead(buttonPin);
  if (buttonState == HIGH) {
    int number = random(1,7);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("You Rolled:");
    lcd.setCursor(6,1);
    lcd.print(number);
    delay(1000);
  }
}

Circuit Working:

Parts List:

Through the above circuit diagram.

When button is not pressed then pin 2 is LOW.

This happens because of 10k resistor.

LCD shows nothing or last number.

When button is pressed then 5V goes to pin 2.

Arduino reads HIGH signal.

Arduino makes random number from 1 to 6.

LCD shows that number as dice result.

When button is released then it waits for next press.

Formulas with Calculation:

Below is the basic formula for Digital Dice Circuit using Arduino Uno.

Pull-down resistor keeps pin low when button not pressed.

Formula is: R = (Vcc – Vinput) / I

here,

• Vcc is 5V
• Vinput is 0V
• I is 0.5mA (safe limit)

So R = (5 – 0) / 0.0005 = 10k (approx).

This value matches the 10k resistor used in circuit.

How to Build:

To build a Digital Dice Circuit using Arduino Uno follow the below steps for connection:

• Gather all the parts as shown in circuit diagram.
• Button one side connect to 5V
• Button other side connect to pin 2
• 10k resistor connect between pin 2 and GND.
• LCD I2C Module VCC pin connect to 5V
• LCD I2C Module GND pin connect to GND
• LCD I2C Module SDA pin connect to A4
• LCD I2C Module SCL pin connect to A5

Conclusion:

This Digital Dice Circuit using Arduino Uno is easy to make.

It works like electronic dice.

We learn how button works.

We can see how LCD shows number.

Arduino makes random number.

Its good for beginners which helps to practice coding and circuit.

We can add sound or LED for more fun.

References:

Arduino Digital Dice