What components do I need for the Electronic Dice Roller project?

For the Electronic Dice Roller project, you need: 1x Arduino Uno R3 (5V), 1x 7-Segment Display (Common Cathode), 7x Resistors (220 Ohm), 1x Push Button (Momentary), 1x Resistor (10k Ohm pull-down), 1x Breadboard + Wires (Full-size).

How do I build an Electronic Dice Roller with Arduino?

Press a button and get a random 1–6 on a 7-segment display — your first random number generator. Follow these 3 steps: Step 1: Wire the Display. Step 2: Wire the Button. Step 3: Upload and Roll.

How long does the Electronic Dice Roller project take?

The Electronic Dice Roller Arduino project typically takes 30–60 minutes to complete, including wiring and uploading the code. It is rated as a Basic-level project, suitable for beginners with no prior electronics experience.

Is the Electronic Dice Roller Arduino code free to use?

Yes. All Arduino code on Volt X, including the Electronic Dice Roller sketch, is completely free to use, copy, and modify for personal or educational projects.

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Basic . Project #09

🎲 Electronic Dice Roller

Press a button and get a random 1–6 on a 7-segment display — your first random number generator.

📋 Overview

A 7-segment display has 7 LED segments (a-g) that can be turned on/off individually. By lighting specific combinations, you can display digits 0–9. Combined with Arduino's random(), you get a digital dice.

What you'll learn: 7-segment display wiring, segment mapping arrays, random(), and button debouncing.

Estimated time: 45–60 minutes. Difficulty: ⭐⭐ Easy.

🧩 Components Needed

Component	Specification	Qty	Notes
Arduino Uno R3	5V	1
7-Segment Display	Common Cathode	1	1-digit, 0.56"
Resistors	220 Ohm	7	One per segment
Push Button	Momentary	1	Roll button
Resistor	10k Ohm pull-down	1	For button
Breadboard + Wires	Full-size	1

📖 Step-by-Step Tutorial

Wire the Display

Connect segments a-g to Arduino pins 2???8 via 220 Ohm resistors. Connect common cathode to GND.

Wire the Button

Button -> pin 9 and 5V. 10k Ohm pull-down from pin 9 to GND.

Upload and Roll

Press the button to roll! A random 1???6 appears on the display.

💡

Use randomSeed(analogRead(A0)) with an unconnected analog pin to get truly random seeds on every power cycle.

💻 Arduino Code

dice_roller.ino

INO

// Electronic Dice Roller — Volt X
// Segments a-g connected to pins 2-8 (common cathode)
const int seg[7] = {2,3,4,5,6,7,8};
const int btn = 9;

// Segment patterns for 1-6
const byte digits[7][7] = {
  {0,1,1,0,0,0,0}, // 1
  {1,1,0,1,1,0,1}, // 2
  {1,1,1,1,0,0,1}, // 3
  {0,1,1,0,0,1,1}, // 4
  {1,0,1,1,0,1,1}, // 5
  {1,0,1,1,1,1,1}  // 6
};

void showDigit(int n) {
  for(int i=0;i<7;i++)
    digitalWrite(seg[i], digits[n][i]);
}

void setup() {
  for(int i=0;i<7;i++) pinMode(seg[i], OUTPUT);
  pinMode(btn, INPUT);
  randomSeed(analogRead(A0));
  showDigit(0);

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