LED Matrix Dice Roller

Parts:

Wiring

Arduino	LED Matrix
5V	VCC
GND	GND
12	DIN
10	CS
11	CLK

Also add button to pin 8. Please see previous tutorials if you don't remember how to add a button.

Code:

/* To install this library, go to
  Sketch --> Include Library--> Manage Libraries
  now search for "LedControl"
  Choose install
*/
#include "LedControl.h"

LedControl lc = LedControl(12, 11, 10, 1);
/* we always wait a bit between updates of the display */

unsigned long delaytime = 300;

//variables for the button
const int buttonPin = 8;
bool released = true;


void setup() {
  //sets up the butonPin as an input
  pinMode(buttonPin, INPUT_PULLUP);

  //this command allows the random function to work better.
  randomSeed(analogRead(0));

  /*
    The MAX72XX is in power-saving mode on startup,
    we have to do a wakeup call
  */
  lc.shutdown(0, false);
  /* Set the brightness to a medium values */
  lc.setIntensity(0, 8);
  /* and clear the display */
  lc.clearDisplay(0);
}

void loop() {

  //check if the button is pressed and it has been released
  if (digitalRead(buttonPin) == LOW and released == true)
  {
    released = false;
    loading();
    showRandom();
    delay(50);
  }

  //check to see when the button gets released
  if (digitalRead(buttonPin) == HIGH) {
    released = true;
    delay(50);
  }
}

//function to generate a random number of the LED Matrix
void showRandom()
{

  int randomNumber = random(1, 7);
  if (randomNumber == 1) {
    lc.setRow(0, 0, B00000000);
    lc.setRow(0, 1, B00000000);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B00011000);
    lc.setRow(0, 4, B00011000);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B00000000);
    lc.setRow(0, 7, B00000000);

  }
  else if (randomNumber == 2) {
    lc.setRow(0, 0, B11000000);
    lc.setRow(0, 1, B11000000);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B00000000);
    lc.setRow(0, 4, B00000000);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B00000011);
    lc.setRow(0, 7, B00000011);
  }
  else if (randomNumber == 3) {
    lc.setRow(0, 0, B11000000);
    lc.setRow(0, 1, B11000000);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B00011000);
    lc.setRow(0, 4, B00011000);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B00000011);
    lc.setRow(0, 7, B00000011);
  }

  else if (randomNumber == 4) {
    lc.setRow(0, 0, B11000011);
    lc.setRow(0, 1, B11000011);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B00000000);
    lc.setRow(0, 4, B00000000);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B11000011);
    lc.setRow(0, 7, B11000011);
  }

  else if (randomNumber == 5) {
    lc.setRow(0, 0, B11000011);
    lc.setRow(0, 1, B11000011);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B00011000);
    lc.setRow(0, 4, B00011000);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B11000011);
    lc.setRow(0, 7, B11000011);
  }
  else {
    lc.setRow(0, 0, B11000011);
    lc.setRow(0, 1, B11000011);
    lc.setRow(0, 2, B00000000);
    lc.setRow(0, 3, B11000011);
    lc.setRow(0, 4, B11000011);
    lc.setRow(0, 5, B00000000);
    lc.setRow(0, 6, B11000011);
    lc.setRow(0, 7, B11000011);
  }

  //function to run before the numer is displayed
}
void loading() {
  lc.setRow(0, 0, B11111111);
  lc.setRow(0, 1, B10000001);
  lc.setRow(0, 2, B10000001);
  lc.setRow(0, 3, B10000001);
  lc.setRow(0, 4, B10000001);
  lc.setRow(0, 5, B10000001);
  lc.setRow(0, 6, B10000001);
  lc.setRow(0, 7, B11111111);
  delay(delaytime);
  lc.setRow(0, 0, B00000000);
  lc.setRow(0, 1, B01111110);
  lc.setRow(0, 2, B01000010);
  lc.setRow(0, 3, B01000010);
  lc.setRow(0, 4, B01000010);
  lc.setRow(0, 5, B01000010);
  lc.setRow(0, 6, B01111110);
  lc.setRow(0, 7, B00000000);
  delay(delaytime);
  lc.setRow(0, 0, B00000000);
  lc.setRow(0, 1, B00000000);
  lc.setRow(0, 2, B00111100);
  lc.setRow(0, 3, B00100100);
  lc.setRow(0, 4, B00100100);
  lc.setRow(0, 5, B00111100);
  lc.setRow(0, 6, B00000000);
  lc.setRow(0, 7, B00000000);
  delay(delaytime);
  lc.setRow(0, 0, B00000000);
  lc.setRow(0, 1, B00000000);
  
  lc.setRow(0, 2, B00000000);
  lc.setRow(0, 3, B00011000);
  lc.setRow(0, 4, B00011000);
  lc.setRow(0, 5, B00000000);
  lc.setRow(0, 6, B00000000);
  lc.setRow(0, 7, B00000000);
  delay(delaytime);
  lc.setRow(0, 0, B00000000);
  lc.setRow(0, 1, B00000000);
  lc.setRow(0, 2, B00111100);
  lc.setRow(0, 3, B00100100);
  lc.setRow(0, 4, B00100100);
  lc.setRow(0, 5, B00111100);
  lc.setRow(0, 6, B00000000);
  lc.setRow(0, 7, B00000000);
  delay(delaytime);
  lc.setRow(0, 0, B00000000);
  lc.setRow(0, 1, B01111110);
  lc.setRow(0, 2, B01000010);
  lc.setRow(0, 3, B01000010);
  lc.setRow(0, 4, B01000010);
  lc.setRow(0, 5, B01000010);
  lc.setRow(0, 6, B01111110);
  lc.setRow(0, 7, B00000000);
  delay(delaytime);
  lc.setRow(0, 0, B11111111);
  lc.setRow(0, 1, B10000001);
  lc.setRow(0, 2, B10000001);
  lc.setRow(0, 3, B10000001);
  lc.setRow(0, 4, B10000001);
  lc.setRow(0, 5, B10000001);
  lc.setRow(0, 6, B10000001);
  lc.setRow(0, 7, B11111111);
  delay(delaytime);
}
  

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