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Published December 3, 2020

Easy Arduino Digital Dice

This project allows you to create a really simple digital dice using a one-digit seven segment display and a photoresistor.

BeginnerFull instructions provided1,202

Things used in this project

Hardware components

Arduino UNO

Photo resistor

7 Segment LED Display, Red

Any color is fine

Jumper wires (generic)

Breadboard (generic)

Resistor 220 ohm

Resistor 10k ohm

Software apps and online services

Arduino IDE

Story

About this project:

This is an easy Digital Dice project using a one-digit 7 segment display. It is so simple because all you need to do is touch the top of the photoresistor (LDR).

If you would like to see how it works, go ahead and click on this link!

1-digit 7 segment display breakdown:

The Connections of the display

Each pin is labeled a different letter and connected to light up a different LED in the display. I will be referencing this to explain the connections. (ex. C goes to Pin 5).

Connections:

Photoresistor/LDR first pin is connected to 5V

Photoresistor/LDR second pin is connected by a 10 KΩ resistor to GND, also the same pin is connected to A0 on the Arduino Uno

The1digit7segmentdisplay is connected by multiple 220Ω resistors to various pins.

These are the connections

Those are the specific connections. Refer above to see what the letter pins on the display refer to.

NOTE: You can configure the lighting in the code to the lighting in your room. Just use this link to figure out your photoresistor readings.

NOTE #2: If you do not want to use 8 220 Ω resistors, you can change all of the HIGHs in the digitalWrite(_, HIGH); to a DEFAULT: digitalWrite(_, DEFAULT);. These will be in the if statements and will set the LEDs in the segments to a medium level so the display won't burn out. :)

Code

Code

int a = 7;
int b = 6;
int c = 5;
int d = 11;
int e = 10;
int f = 8;
int g = 9;
int dp = 4;
int a = 7;
int b =    6;
int c = 5;
int d = 11;
int e = 10;
int f = 8;
int g = 9;
int start = 400;

void setup() {
  Serial.begin(9600);
  digitalWrite(a, OUTPUT);
  digitalWrite(b, OUTPUT);
  digitalWrite(c, OUTPUT);
  digitalWrite(d, OUTPUT);
  digitalWrite(e, OUTPUT);
  digitalWrite(f, OUTPUT);
  digitalWrite(g, OUTPUT);
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}


void loop() {
  int ran = random(1, 6);
  Serial.print(ran);
  int value = analogRead(A0);
  if (start < start && ran == 1)
  {
    digitalWrite(c, HIGH);
    digitalWrite(b, HIGH);
    delay(9000);
    digitalWrite(c, LOW);
    digitalWrite(b, LOW);
  }
  else if (value < start && ran == 2)
  {
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(e, HIGH);
    digitalWrite(d, HIGH);
    delay(9000);
    digitalWrite(a, LOW);
    digitalWrite(b, LOW);
    digitalWrite(g, LOW);
    digitalWrite(e, LOW);
    digitalWrite(d, LOW);
  }
  else if (value < start && ran == 3)
  {
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(d, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    delay(9000);
    digitalWrite(a, LOW);
    digitalWrite(b, LOW);
    digitalWrite(c, LOW);
    digitalWrite(d, LOW);
    digitalWrite(g, LOW);
  }
  else if (value < start && ran == 4)
  {
    digitalWrite(f, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(c, HIGH);
    delay(9000);
    digitalWrite(f, LOW);
    digitalWrite(g, LOW);
    digitalWrite(b, LOW);
    digitalWrite(c, LOW); 
  }
  else if (value < start && ran == 5)
  {
    digitalWrite(a, HIGH);
    digitalWrite(f, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);
    delay(9000);
    digitalWrite(a, LOW);
    digitalWrite(f, LOW);         
    digitalWrite(g, LOW);
    digitalWrite(c, LOW);
    digitalWrite(d, LOW);
  }
  else if (value < start && ran == 6)
  {
    digitalWrite(a, HIGH);
    digitalWrite(f, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);
    digitalWrite(e, HIGH);
    delay(9000);
    digitalWrite(a, LOW);
    digitalWrite(f, LOW);
    digitalWrite(g, LOW);
    digitalWrite(c, LOW);
    digitalWrite(d, LOW);
    digitalWrite(e, LOW);
  }
  delay(500);
}

Credits

arduinobot12

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Easy Arduino Digital Dice

Things used in this project

Hardware components

Software apps and online services

Story

Connections:

Schematics

Schematic

Code

Code

Credits

arduinobot12

Comments

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Easy Arduino Digital Dice

Easy Arduino Digital Dice

Things used in this project

Hardware components

Software apps and online services

Story

Connections:

Schematics

Schematic

Code

Code

Credits

arduinobot12

Comments

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