LED 8X8 Matrix interface with Arduino Uno

Circuit Diagram

Program Code

#include "LedControl.h"

#include "binary.h"

/*

 DIN connects to pin 12

 CLK connects to pin 11

 CS connects to pin 10 

*/

LedControl lc=LedControl(12,11,10,1);

// delay time between faces

unsigned long delaytime=1000;

// happy face

byte hf[8]= {B00111100,B01000010,B10100101,B10000001,B10100101,B10011001,B01000010,B00111100};

// neutral face

byte nf[8]={B00111100, B01000010,B10100101,B10000001,B10111101,B10000001,B01000010,B00111100};

// sad face

byte sf[8]= {B00111100,B01000010,B10100101,B10000001,B10011001,B10100101,B01000010,B00111100};

void setup() {

  lc.shutdown(0,false);

  // Set brightness to a medium value

  lc.setIntensity(0,8);

  // Clear the display

  lc.clearDisplay(0);  

}

void drawFaces(){

  // Display sad face

  lc.setRow(0,0,sf[0]);

  lc.setRow(0,1,sf[1]);

  lc.setRow(0,2,sf[2]);

  lc.setRow(0,3,sf[3]);

  lc.setRow(0,4,sf[4]);

  lc.setRow(0,5,sf[5]);

  lc.setRow(0,6,sf[6]);

  lc.setRow(0,7,sf[7]);

  delay(delaytime);

  

  // Display neutral face

  lc.setRow(0,0,nf[0]);

  lc.setRow(0,1,nf[1]);

  lc.setRow(0,2,nf[2]);

  lc.setRow(0,3,nf[3]);

  lc.setRow(0,4,nf[4]);

  lc.setRow(0,5,nf[5]);

  lc.setRow(0,6,nf[6]);

  lc.setRow(0,7,nf[7]);

  delay(delaytime);

  

  // Display happy face

  lc.setRow(0,0,hf[0]);

  lc.setRow(0,1,hf[1]);

  lc.setRow(0,2,hf[2]);

  lc.setRow(0,3,hf[3]);

  lc.setRow(0,4,hf[4]);

  lc.setRow(0,5,hf[5]);

  lc.setRow(0,6,hf[6]);

  lc.setRow(0,7,hf[7]);

  delay(delaytime);

}

void loop(){

  drawFaces();

}