Controlling 8x8 LED matrix without drivers & libraries

Complete tutorial on how to control 8x8 Matrix when you do not want to use driver chips like MAX2719 and corresponding Libraries.

Sep 6, 2020

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led matrix

1088as

multiplexing

Components and supplies

Through Hole Resistor, 330 ohm

LED Dot Matrix Display, Red

Arduino Nano R3

Project description

Code

Testing all 64 LED of the 8x8 LED matrix

arduino

1// Mario's Ideas
2// Testing all 64 leds in 8x8 LED matrix by lighting  them up one by one
3
4// Raws 
5#define R1 2
6#define R2 3
7#define R3  4
8#define R4 5
9#define R5 6
10#define R6 7
11#define R7 8
12#define R8  9
13//Columns
14#define C1 10
15#define C2 11
16#define C3 12
17#define C4  13
18#define C5 A0
19#define C6 A1
20#define C7 A2
21#define C8 A3
22
23
24
25void  setup() {
26   pinMode(R1, OUTPUT);
27   pinMode(R2, OUTPUT);
28   pinMode(R3,  OUTPUT);
29   pinMode(R4, OUTPUT);
30   pinMode(R5, OUTPUT);
31   pinMode(R6,  OUTPUT);
32   pinMode(R7, OUTPUT);
33   pinMode(R8, OUTPUT);
34   pinMode(C1,  OUTPUT);
35   pinMode(C2, OUTPUT);
36   pinMode(C3, OUTPUT);
37   pinMode(C4,  OUTPUT);
38   pinMode(C5, OUTPUT);
39   pinMode(C6, OUTPUT);
40   pinMode(C7,  OUTPUT);
41   pinMode(C8, OUTPUT);
42// Turning all the LEDs off at the start  of the sketch
43  digitalWrite(R1,HIGH);
44  digitalWrite(R2,HIGH);
45  digitalWrite(R3,HIGH);
46  digitalWrite(R4,HIGH);
47  digitalWrite(R5,HIGH);
48  digitalWrite(R6,HIGH);
49  digitalWrite(R7,HIGH);
50  digitalWrite(R8,HIGH);
51  digitalWrite(C1,LOW);
52  digitalWrite(C2,LOW);
53  digitalWrite(C3,LOW);
54  digitalWrite(C4,LOW);
55  digitalWrite(C5,LOW);
56  digitalWrite(C6,LOW);
57  digitalWrite(C7,LOW);
58  digitalWrite(C8,LOW);
59}
60
61
62
63void SelectRow(int row){
64  if (row==1)  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
65  if (row==2) digitalWrite(R2,LOW);  else digitalWrite(R2,HIGH);
66  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
67  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
68  if (row==5)  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
69  if (row==6) digitalWrite(R6,LOW);  else digitalWrite(R6,HIGH);
70  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
71  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
72}
73
74void  SelectColumn(int column){
75  if (column==1) digitalWrite(C1,HIGH); else digitalWrite(C1,LOW);
76  if (column==2) digitalWrite(C2,HIGH); else digitalWrite(C2,LOW);
77  if (column==3)  digitalWrite(C3,HIGH); else digitalWrite(C3,LOW);
78  if (column==4) digitalWrite(C4,HIGH);  else digitalWrite(C4,LOW);
79  if (column==5) digitalWrite(C5,HIGH); else digitalWrite(C5,LOW);
80  if (column==6) digitalWrite(C6,HIGH); else digitalWrite(C6,LOW);
81  if (column==7)  digitalWrite(C7,HIGH); else digitalWrite(C7,LOW);
82  if (column==8) digitalWrite(C8,HIGH);  else digitalWrite(C8,LOW);
83
84}
85
86
87void loop() {
88  for (int i=1;i<9;i++)  {
89    for (int j=1;j<9;j++){
90      SelectRow(i);
91      SelectColumn(j);  
92      delay(100);
93    }
94  }
95}

// Mario's Ideas
// Testing all 64 leds in 8x8 LED matrix by lighting  them up one by one

// Raws 
#define R1 2
#define R2 3
#define R3  4
#define R4 5
#define R5 6
#define R6 7
#define R7 8
#define R8  9
//Columns
#define C1 10
#define C2 11
#define C3 12
#define C4  13
#define C5 A0
#define C6 A1
#define C7 A2
#define C8 A3



void  setup() {
   pinMode(R1, OUTPUT);
   pinMode(R2, OUTPUT);
   pinMode(R3,  OUTPUT);
   pinMode(R4, OUTPUT);
   pinMode(R5, OUTPUT);
   pinMode(R6,  OUTPUT);
   pinMode(R7, OUTPUT);
   pinMode(R8, OUTPUT);
   pinMode(C1,  OUTPUT);
   pinMode(C2, OUTPUT);
   pinMode(C3, OUTPUT);
   pinMode(C4,  OUTPUT);
   pinMode(C5, OUTPUT);
   pinMode(C6, OUTPUT);
   pinMode(C7,  OUTPUT);
   pinMode(C8, OUTPUT);
// Turning all the LEDs off at the start  of the sketch
  digitalWrite(R1,HIGH);
  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);
  digitalWrite(R4,HIGH);
  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);
  digitalWrite(R7,HIGH);
  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);
  digitalWrite(C2,LOW);
  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);
  digitalWrite(C5,LOW);
  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);
  digitalWrite(C8,LOW);
}



void SelectRow(int row){
  if (row==1)  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
  if (row==2) digitalWrite(R2,LOW);  else digitalWrite(R2,HIGH);
  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
  if (row==5)  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
  if (row==6) digitalWrite(R6,LOW);  else digitalWrite(R6,HIGH);
  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
}

void  SelectColumn(int column){
  if (column==1) digitalWrite(C1,HIGH); else digitalWrite(C1,LOW);
  if (column==2) digitalWrite(C2,HIGH); else digitalWrite(C2,LOW);
  if (column==3)  digitalWrite(C3,HIGH); else digitalWrite(C3,LOW);
  if (column==4) digitalWrite(C4,HIGH);  else digitalWrite(C4,LOW);
  if (column==5) digitalWrite(C5,HIGH); else digitalWrite(C5,LOW);
  if (column==6) digitalWrite(C6,HIGH); else digitalWrite(C6,LOW);
  if (column==7)  digitalWrite(C7,HIGH); else digitalWrite(C7,LOW);
  if (column==8) digitalWrite(C8,HIGH);  else digitalWrite(C8,LOW);

}


void loop() {
  for (int i=1;i<9;i++)  {
    for (int j=1;j<9;j++){
      SelectRow(i);
      SelectColumn(j);  
      delay(100);
    }
  }
}

Scrolling text on 8x8 LED matrix (Multiplexing)

arduino

1// Mario's Ideas
2// Scrolling text on 8x8 LED matrix (Multiplexing)
3
4//  Raws 
5#define R1 2
6#define R2 3
7#define R3 4
8#define R4 5
9#define  R5 6
10#define R6 7
11#define R7 8
12#define R8 9
13//Columns
14#define C1  10
15#define C2 11
16#define C3 12
17#define C4 13
18#define C5 A0
19#define  C6 A1
20#define C7 A2
21#define C8 A3
22
23int position=0;
24  
25  int Marios_ideas  [8] [54] ={
26  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
27  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},
28  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
29  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},
30  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},
31  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},
32  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
33  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}
34  };
35
36void setup() {
37   pinMode(R1, OUTPUT);
38   pinMode(R2, OUTPUT);
39   pinMode(R3, OUTPUT);
40   pinMode(R4, OUTPUT);
41   pinMode(R5, OUTPUT);
42   pinMode(R6, OUTPUT);
43   pinMode(R7, OUTPUT);
44   pinMode(R8, OUTPUT);
45   pinMode(C1, OUTPUT);
46   pinMode(C2, OUTPUT);
47   pinMode(C3, OUTPUT);
48   pinMode(C4, OUTPUT);
49   pinMode(C5, OUTPUT);
50   pinMode(C6, OUTPUT);
51   pinMode(C7, OUTPUT);
52   pinMode(C8, OUTPUT);
53
54  digitalWrite(R1,HIGH);
55  digitalWrite(R2,HIGH);
56  digitalWrite(R3,HIGH);
57  digitalWrite(R4,HIGH);
58  digitalWrite(R5,HIGH);
59  digitalWrite(R6,HIGH);
60  digitalWrite(R7,HIGH);
61  digitalWrite(R8,HIGH);
62  digitalWrite(C1,LOW);
63  digitalWrite(C2,LOW);
64  digitalWrite(C3,LOW);
65  digitalWrite(C4,LOW);
66  digitalWrite(C5,LOW);
67  digitalWrite(C6,LOW);
68  digitalWrite(C7,LOW);
69  digitalWrite(C8,LOW);
70}
71
72
73
74void  SelectRow(int row){
75  if (row==1) digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
76  if (row==2) digitalWrite(R2,LOW); else digitalWrite(R2,HIGH);
77  if (row==3)  digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
78  if (row==4) digitalWrite(R4,LOW);  else digitalWrite(R4,HIGH);
79  if (row==5) digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
80  if (row==6) digitalWrite(R6,LOW); else digitalWrite(R6,HIGH);
81  if (row==7)  digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
82  if (row==8) digitalWrite(R8,LOW);  else digitalWrite(R8,HIGH);
83}
84
85void Set_LED_in_Active_Row(int column, int  state){
86  if (column==1) digitalWrite(C1,state); 
87  if (column==2) digitalWrite(C2,state);  
88  if (column==3) digitalWrite(C3,state); 
89  if (column==4) digitalWrite(C4,state);  
90  if (column==5) digitalWrite(C5,state); 
91  if (column==6) digitalWrite(C6,state);  
92  if (column==7) digitalWrite(C7,state); 
93  if (column==8) digitalWrite(C8,state);  
94}
95
96void loop() {
97
98  for (int x=0; x<5;x++){
99    for (int j=0;j<8;j++){
100    SelectRow(j+1);
101      for (int i=0;i<8;i++){
102        Set_LED_in_Active_Row(i+1,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);
103      }
104      delay(2);
105    }
106  }
107  position=position+1;
108}

// Mario's Ideas
// Scrolling text on 8x8 LED matrix (Multiplexing)

//  Raws 
#define R1 2
#define R2 3
#define R3 4
#define R4 5
#define  R5 6
#define R6 7
#define R7 8
#define R8 9
//Columns
#define C1  10
#define C2 11
#define C3 12
#define C4 13
#define C5 A0
#define  C6 A1
#define C7 A2
#define C8 A3

int position=0;
  
  int Marios_ideas  [8] [54] ={
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},
  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},
  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},
  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},
  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}
  };

void setup() {
   pinMode(R1, OUTPUT);
   pinMode(R2, OUTPUT);
   pinMode(R3, OUTPUT);
   pinMode(R4, OUTPUT);
   pinMode(R5, OUTPUT);
   pinMode(R6, OUTPUT);
   pinMode(R7, OUTPUT);
   pinMode(R8, OUTPUT);
   pinMode(C1, OUTPUT);
   pinMode(C2, OUTPUT);
   pinMode(C3, OUTPUT);
   pinMode(C4, OUTPUT);
   pinMode(C5, OUTPUT);
   pinMode(C6, OUTPUT);
   pinMode(C7, OUTPUT);
   pinMode(C8, OUTPUT);

  digitalWrite(R1,HIGH);
  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);
  digitalWrite(R4,HIGH);
  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);
  digitalWrite(R7,HIGH);
  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);
  digitalWrite(C2,LOW);
  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);
  digitalWrite(C5,LOW);
  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);
  digitalWrite(C8,LOW);
}



void  SelectRow(int row){
  if (row==1) digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
  if (row==2) digitalWrite(R2,LOW); else digitalWrite(R2,HIGH);
  if (row==3)  digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
  if (row==4) digitalWrite(R4,LOW);  else digitalWrite(R4,HIGH);
  if (row==5) digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
  if (row==6) digitalWrite(R6,LOW); else digitalWrite(R6,HIGH);
  if (row==7)  digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
  if (row==8) digitalWrite(R8,LOW);  else digitalWrite(R8,HIGH);
}

void Set_LED_in_Active_Row(int column, int  state){
  if (column==1) digitalWrite(C1,state); 
  if (column==2) digitalWrite(C2,state);  
  if (column==3) digitalWrite(C3,state); 
  if (column==4) digitalWrite(C4,state);  
  if (column==5) digitalWrite(C5,state); 
  if (column==6) digitalWrite(C6,state);  
  if (column==7) digitalWrite(C7,state); 
  if (column==8) digitalWrite(C8,state);  
}

void loop() {

  for (int x=0; x<5;x++){
    for (int j=0;j<8;j++){
    SelectRow(j+1);
      for (int i=0;i<8;i++){
        Set_LED_in_Active_Row(i+1,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);
      }
      delay(2);
    }
  }
  position=position+1;
}

Displaying cat image on 8x8 LED Matrix (Multiplexing)

arduino

1// Mario's ideas
2// Displaying cat image on 8x8 LED Matrix (Multiplexing)
3
4//  Raws 
5#define R1 2
6#define R2 3
7#define R3 4
8#define R4 5
9#define  R5 6
10#define R6 7
11#define R7 8
12#define R8 9
13//Columns
14#define C1  10
15#define C2 11
16#define C3 12
17#define C4 13
18#define C5 A0
19#define  C6 A1
20#define C7 A2
21#define C8 A3
22
23int pause=300;
24
25
26  int Cat  [8] [8] ={
27  {1,0,0,0,1,0,0,0},
28  {1,1,1,1,1,0,0,0},
29  {1,0,1,0,1,0,0,0},
30  {0,1,1,1,0,0,0,1},
31  {0,0,1,0,0,0,0,1},
32  {0,1,1,1,1,0,0,1},
33  {0,1,1,1,1,1,0,1},
34  {1,0,1,1,1,1,1,0},
35  };
36
37void setup() {
38   pinMode(R1, OUTPUT);
39   pinMode(R2, OUTPUT);
40   pinMode(R3, OUTPUT);
41   pinMode(R4, OUTPUT);
42   pinMode(R5, OUTPUT);
43   pinMode(R6, OUTPUT);
44   pinMode(R7, OUTPUT);
45   pinMode(R8, OUTPUT);
46   pinMode(C1, OUTPUT);
47   pinMode(C2, OUTPUT);
48   pinMode(C3, OUTPUT);
49   pinMode(C4, OUTPUT);
50   pinMode(C5, OUTPUT);
51   pinMode(C6, OUTPUT);
52   pinMode(C7, OUTPUT);
53   pinMode(C8, OUTPUT);
54
55  digitalWrite(R1,HIGH);
56  digitalWrite(R2,HIGH);
57  digitalWrite(R3,HIGH);
58  digitalWrite(R4,HIGH);
59  digitalWrite(R5,HIGH);
60  digitalWrite(R6,HIGH);
61  digitalWrite(R7,HIGH);
62  digitalWrite(R8,HIGH);
63  digitalWrite(C1,LOW);
64  digitalWrite(C2,LOW);
65  digitalWrite(C3,LOW);
66  digitalWrite(C4,LOW);
67  digitalWrite(C5,LOW);
68  digitalWrite(C6,LOW);
69  digitalWrite(C7,LOW);
70  digitalWrite(C8,LOW);
71}
72
73
74
75void SelectRow(int row){
76  if (row==1)  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
77  if (row==2) digitalWrite(R2,LOW);  else digitalWrite(R2,HIGH);
78  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
79  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
80  if (row==5)  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
81  if (row==6) digitalWrite(R6,LOW);  else digitalWrite(R6,HIGH);
82  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
83  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
84}
85
86void  Set_LED_in_Active_Row(int column, int state){
87  if (column==1) digitalWrite(C1,state);  
88  if (column==2) digitalWrite(C2,state); 
89  if (column==3) digitalWrite(C3,state);  
90  if (column==4) digitalWrite(C4,state); 
91  if (column==5) digitalWrite(C5,state);  
92  if (column==6) digitalWrite(C6,state); 
93  if (column==7) digitalWrite(C7,state);  
94  if (column==8) digitalWrite(C8,state); 
95}
96
97void loop() {
98
99
100    for (int j=0;j<8;j++){
101    SelectRow(j+1);
102      for (int i=0;i<8;i++){
103        Set_LED_in_Active_Row(i+1 ,Cat[j][i]);
104      }
105      delay(2+pause);
106    }
107if(pause!=0 and pause>100)pause=pause-100;
108if(pause!=0 and pause<=100)pause=pause-10;
109}
110

// Mario's ideas
// Displaying cat image on 8x8 LED Matrix (Multiplexing)

//  Raws 
#define R1 2
#define R2 3
#define R3 4
#define R4 5
#define  R5 6
#define R6 7
#define R7 8
#define R8 9
//Columns
#define C1  10
#define C2 11
#define C3 12
#define C4 13
#define C5 A0
#define  C6 A1
#define C7 A2
#define C8 A3

int pause=300;


  int Cat  [8] [8] ={
  {1,0,0,0,1,0,0,0},
  {1,1,1,1,1,0,0,0},
  {1,0,1,0,1,0,0,0},
  {0,1,1,1,0,0,0,1},
  {0,0,1,0,0,0,0,1},
  {0,1,1,1,1,0,0,1},
  {0,1,1,1,1,1,0,1},
  {1,0,1,1,1,1,1,0},
  };

void setup() {
   pinMode(R1, OUTPUT);
   pinMode(R2, OUTPUT);
   pinMode(R3, OUTPUT);
   pinMode(R4, OUTPUT);
   pinMode(R5, OUTPUT);
   pinMode(R6, OUTPUT);
   pinMode(R7, OUTPUT);
   pinMode(R8, OUTPUT);
   pinMode(C1, OUTPUT);
   pinMode(C2, OUTPUT);
   pinMode(C3, OUTPUT);
   pinMode(C4, OUTPUT);
   pinMode(C5, OUTPUT);
   pinMode(C6, OUTPUT);
   pinMode(C7, OUTPUT);
   pinMode(C8, OUTPUT);

  digitalWrite(R1,HIGH);
  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);
  digitalWrite(R4,HIGH);
  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);
  digitalWrite(R7,HIGH);
  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);
  digitalWrite(C2,LOW);
  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);
  digitalWrite(C5,LOW);
  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);
  digitalWrite(C8,LOW);
}



void SelectRow(int row){
  if (row==1)  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
  if (row==2) digitalWrite(R2,LOW);  else digitalWrite(R2,HIGH);
  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
  if (row==5)  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
  if (row==6) digitalWrite(R6,LOW);  else digitalWrite(R6,HIGH);
  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
}

void  Set_LED_in_Active_Row(int column, int state){
  if (column==1) digitalWrite(C1,state);  
  if (column==2) digitalWrite(C2,state); 
  if (column==3) digitalWrite(C3,state);  
  if (column==4) digitalWrite(C4,state); 
  if (column==5) digitalWrite(C5,state);  
  if (column==6) digitalWrite(C6,state); 
  if (column==7) digitalWrite(C7,state);  
  if (column==8) digitalWrite(C8,state); 
}

void loop() {


    for (int j=0;j<8;j++){
    SelectRow(j+1);
      for (int i=0;i<8;i++){
        Set_LED_in_Active_Row(i+1 ,Cat[j][i]);
      }
      delay(2+pause);
    }
if(pause!=0 and pause>100)pause=pause-100;
if(pause!=0 and pause<=100)pause=pause-10;
}

Testing all 64 LED of the 8x8 LED matrix

arduino

1// Mario's Ideas
2// Testing all 64 leds in 8x8 LED matrix by lighting
3  them up one by one
4
5// Raws 
6#define R1 2
7#define R2 3
8#define R3
9  4
10#define R4 5
11#define R5 6
12#define R6 7
13#define R7 8
14#define R8
15  9
16//Columns
17#define C1 10
18#define C2 11
19#define C3 12
20#define C4
21  13
22#define C5 A0
23#define C6 A1
24#define C7 A2
25#define C8 A3
26
27
28
29void
30  setup() {
31   pinMode(R1, OUTPUT);
32   pinMode(R2, OUTPUT);
33   pinMode(R3,
34  OUTPUT);
35   pinMode(R4, OUTPUT);
36   pinMode(R5, OUTPUT);
37   pinMode(R6,
38  OUTPUT);
39   pinMode(R7, OUTPUT);
40   pinMode(R8, OUTPUT);
41   pinMode(C1,
42  OUTPUT);
43   pinMode(C2, OUTPUT);
44   pinMode(C3, OUTPUT);
45   pinMode(C4,
46  OUTPUT);
47   pinMode(C5, OUTPUT);
48   pinMode(C6, OUTPUT);
49   pinMode(C7,
50  OUTPUT);
51   pinMode(C8, OUTPUT);
52// Turning all the LEDs off at the start
53  of the sketch
54  digitalWrite(R1,HIGH);
55  digitalWrite(R2,HIGH);
56  digitalWrite(R3,HIGH);
57
58  digitalWrite(R4,HIGH);
59  digitalWrite(R5,HIGH);
60  digitalWrite(R6,HIGH);
61
62  digitalWrite(R7,HIGH);
63  digitalWrite(R8,HIGH);
64  digitalWrite(C1,LOW);
65
66  digitalWrite(C2,LOW);
67  digitalWrite(C3,LOW);
68  digitalWrite(C4,LOW);
69
70  digitalWrite(C5,LOW);
71  digitalWrite(C6,LOW);
72  digitalWrite(C7,LOW);
73
74  digitalWrite(C8,LOW);
75}
76
77
78
79void SelectRow(int row){
80  if (row==1)
81  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
82  if (row==2) digitalWrite(R2,LOW);
83  else digitalWrite(R2,HIGH);
84  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
85
86  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
87  if (row==5)
88  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
89  if (row==6) digitalWrite(R6,LOW);
90  else digitalWrite(R6,HIGH);
91  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
92
93  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
94}
95
96void
97  SelectColumn(int column){
98  if (column==1) digitalWrite(C1,HIGH); else digitalWrite(C1,LOW);
99
100  if (column==2) digitalWrite(C2,HIGH); else digitalWrite(C2,LOW);
101  if (column==3)
102  digitalWrite(C3,HIGH); else digitalWrite(C3,LOW);
103  if (column==4) digitalWrite(C4,HIGH);
104  else digitalWrite(C4,LOW);
105  if (column==5) digitalWrite(C5,HIGH); else digitalWrite(C5,LOW);
106
107  if (column==6) digitalWrite(C6,HIGH); else digitalWrite(C6,LOW);
108  if (column==7)
109  digitalWrite(C7,HIGH); else digitalWrite(C7,LOW);
110  if (column==8) digitalWrite(C8,HIGH);
111  else digitalWrite(C8,LOW);
112
113}
114
115
116void loop() {
117  for (int i=1;i<9;i++)
118  {
119    for (int j=1;j<9;j++){
120      SelectRow(i);
121      SelectColumn(j);
122  
123      delay(100);
124    }
125  }
126}

// Mario's Ideas
// Testing all 64 leds in 8x8 LED matrix by lighting
  them up one by one

// Raws 
#define R1 2
#define R2 3
#define R3
  4
#define R4 5
#define R5 6
#define R6 7
#define R7 8
#define R8
  9
//Columns
#define C1 10
#define C2 11
#define C3 12
#define C4
  13
#define C5 A0
#define C6 A1
#define C7 A2
#define C8 A3



void
  setup() {
   pinMode(R1, OUTPUT);
   pinMode(R2, OUTPUT);
   pinMode(R3,
  OUTPUT);
   pinMode(R4, OUTPUT);
   pinMode(R5, OUTPUT);
   pinMode(R6,
  OUTPUT);
   pinMode(R7, OUTPUT);
   pinMode(R8, OUTPUT);
   pinMode(C1,
  OUTPUT);
   pinMode(C2, OUTPUT);
   pinMode(C3, OUTPUT);
   pinMode(C4,
  OUTPUT);
   pinMode(C5, OUTPUT);
   pinMode(C6, OUTPUT);
   pinMode(C7,
  OUTPUT);
   pinMode(C8, OUTPUT);
// Turning all the LEDs off at the start
  of the sketch
  digitalWrite(R1,HIGH);
  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);

  digitalWrite(R4,HIGH);
  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);

  digitalWrite(R7,HIGH);
  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);

  digitalWrite(C2,LOW);
  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);

  digitalWrite(C5,LOW);
  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);

  digitalWrite(C8,LOW);
}



void SelectRow(int row){
  if (row==1)
  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
  if (row==2) digitalWrite(R2,LOW);
  else digitalWrite(R2,HIGH);
  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);

  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
  if (row==5)
  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
  if (row==6) digitalWrite(R6,LOW);
  else digitalWrite(R6,HIGH);
  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);

  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
}

void
  SelectColumn(int column){
  if (column==1) digitalWrite(C1,HIGH); else digitalWrite(C1,LOW);

  if (column==2) digitalWrite(C2,HIGH); else digitalWrite(C2,LOW);
  if (column==3)
  digitalWrite(C3,HIGH); else digitalWrite(C3,LOW);
  if (column==4) digitalWrite(C4,HIGH);
  else digitalWrite(C4,LOW);
  if (column==5) digitalWrite(C5,HIGH); else digitalWrite(C5,LOW);

  if (column==6) digitalWrite(C6,HIGH); else digitalWrite(C6,LOW);
  if (column==7)
  digitalWrite(C7,HIGH); else digitalWrite(C7,LOW);
  if (column==8) digitalWrite(C8,HIGH);
  else digitalWrite(C8,LOW);

}


void loop() {
  for (int i=1;i<9;i++)
  {
    for (int j=1;j<9;j++){
      SelectRow(i);
      SelectColumn(j);
  
      delay(100);
    }
  }
}

Scrolling text on 8x8 LED matrix (Multiplexing)

arduino

1// Mario's Ideas
2// Scrolling text on 8x8 LED matrix (Multiplexing)
3
4//
5  Raws 
6#define R1 2
7#define R2 3
8#define R3 4
9#define R4 5
10#define
11  R5 6
12#define R6 7
13#define R7 8
14#define R8 9
15//Columns
16#define C1
17  10
18#define C2 11
19#define C3 12
20#define C4 13
21#define C5 A0
22#define
23  C6 A1
24#define C7 A2
25#define C8 A3
26
27int position=0;
28  
29  int Marios_ideas
30  [8] [54] ={
31  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
32
33  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},
34
35  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
36
37  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},
38
39  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},
40
41  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},
42
43  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
44
45  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}
46
47  };
48
49void setup() {
50   pinMode(R1, OUTPUT);
51   pinMode(R2, OUTPUT);
52
53   pinMode(R3, OUTPUT);
54   pinMode(R4, OUTPUT);
55   pinMode(R5, OUTPUT);
56
57   pinMode(R6, OUTPUT);
58   pinMode(R7, OUTPUT);
59   pinMode(R8, OUTPUT);
60
61   pinMode(C1, OUTPUT);
62   pinMode(C2, OUTPUT);
63   pinMode(C3, OUTPUT);
64
65   pinMode(C4, OUTPUT);
66   pinMode(C5, OUTPUT);
67   pinMode(C6, OUTPUT);
68
69   pinMode(C7, OUTPUT);
70   pinMode(C8, OUTPUT);
71
72  digitalWrite(R1,HIGH);
73
74  digitalWrite(R2,HIGH);
75  digitalWrite(R3,HIGH);
76  digitalWrite(R4,HIGH);
77
78  digitalWrite(R5,HIGH);
79  digitalWrite(R6,HIGH);
80  digitalWrite(R7,HIGH);
81
82  digitalWrite(R8,HIGH);
83  digitalWrite(C1,LOW);
84  digitalWrite(C2,LOW);
85
86  digitalWrite(C3,LOW);
87  digitalWrite(C4,LOW);
88  digitalWrite(C5,LOW);
89
90  digitalWrite(C6,LOW);
91  digitalWrite(C7,LOW);
92  digitalWrite(C8,LOW);
93}
94
95
96
97void
98  SelectRow(int row){
99  if (row==1) digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
100
101  if (row==2) digitalWrite(R2,LOW); else digitalWrite(R2,HIGH);
102  if (row==3)
103  digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
104  if (row==4) digitalWrite(R4,LOW);
105  else digitalWrite(R4,HIGH);
106  if (row==5) digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
107
108  if (row==6) digitalWrite(R6,LOW); else digitalWrite(R6,HIGH);
109  if (row==7)
110  digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
111  if (row==8) digitalWrite(R8,LOW);
112  else digitalWrite(R8,HIGH);
113}
114
115void Set_LED_in_Active_Row(int column, int
116  state){
117  if (column==1) digitalWrite(C1,state); 
118  if (column==2) digitalWrite(C2,state);
119  
120  if (column==3) digitalWrite(C3,state); 
121  if (column==4) digitalWrite(C4,state);
122  
123  if (column==5) digitalWrite(C5,state); 
124  if (column==6) digitalWrite(C6,state);
125  
126  if (column==7) digitalWrite(C7,state); 
127  if (column==8) digitalWrite(C8,state);
128  
129}
130
131void loop() {
132
133  for (int x=0; x<5;x++){
134    for (int j=0;j<8;j++){
135
136    SelectRow(j+1);
137      for (int i=0;i<8;i++){
138        Set_LED_in_Active_Row(i+1,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);
139
140      }
141      delay(2);
142    }
143  }
144  position=position+1;
145}

// Mario's Ideas
// Scrolling text on 8x8 LED matrix (Multiplexing)

//
  Raws 
#define R1 2
#define R2 3
#define R3 4
#define R4 5
#define
  R5 6
#define R6 7
#define R7 8
#define R8 9
//Columns
#define C1
  10
#define C2 11
#define C3 12
#define C4 13
#define C5 A0
#define
  C6 A1
#define C7 A2
#define C8 A3

int position=0;
  
  int Marios_ideas
  [8] [54] ={
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},

  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},

  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},

  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},

  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},

  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},

  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},

  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}

  };

void setup() {
   pinMode(R1, OUTPUT);
   pinMode(R2, OUTPUT);

   pinMode(R3, OUTPUT);
   pinMode(R4, OUTPUT);
   pinMode(R5, OUTPUT);

   pinMode(R6, OUTPUT);
   pinMode(R7, OUTPUT);
   pinMode(R8, OUTPUT);

   pinMode(C1, OUTPUT);
   pinMode(C2, OUTPUT);
   pinMode(C3, OUTPUT);

   pinMode(C4, OUTPUT);
   pinMode(C5, OUTPUT);
   pinMode(C6, OUTPUT);

   pinMode(C7, OUTPUT);
   pinMode(C8, OUTPUT);

  digitalWrite(R1,HIGH);

  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);
  digitalWrite(R4,HIGH);

  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);
  digitalWrite(R7,HIGH);

  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);
  digitalWrite(C2,LOW);

  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);
  digitalWrite(C5,LOW);

  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);
  digitalWrite(C8,LOW);
}



void
  SelectRow(int row){
  if (row==1) digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);

  if (row==2) digitalWrite(R2,LOW); else digitalWrite(R2,HIGH);
  if (row==3)
  digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
  if (row==4) digitalWrite(R4,LOW);
  else digitalWrite(R4,HIGH);
  if (row==5) digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);

  if (row==6) digitalWrite(R6,LOW); else digitalWrite(R6,HIGH);
  if (row==7)
  digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
  if (row==8) digitalWrite(R8,LOW);
  else digitalWrite(R8,HIGH);
}

void Set_LED_in_Active_Row(int column, int
  state){
  if (column==1) digitalWrite(C1,state); 
  if (column==2) digitalWrite(C2,state);
  
  if (column==3) digitalWrite(C3,state); 
  if (column==4) digitalWrite(C4,state);
  
  if (column==5) digitalWrite(C5,state); 
  if (column==6) digitalWrite(C6,state);
  
  if (column==7) digitalWrite(C7,state); 
  if (column==8) digitalWrite(C8,state);
  
}

void loop() {

  for (int x=0; x<5;x++){
    for (int j=0;j<8;j++){

    SelectRow(j+1);
      for (int i=0;i<8;i++){
        Set_LED_in_Active_Row(i+1,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);

      }
      delay(2);
    }
  }
  position=position+1;
}

Displaying cat image on 8x8 LED Matrix (Multiplexing)

arduino

1// Mario's ideas
2// Displaying cat image on 8x8 LED Matrix (Multiplexing)
3
4//
5  Raws 
6#define R1 2
7#define R2 3
8#define R3 4
9#define R4 5
10#define
11  R5 6
12#define R6 7
13#define R7 8
14#define R8 9
15//Columns
16#define C1
17  10
18#define C2 11
19#define C3 12
20#define C4 13
21#define C5 A0
22#define
23  C6 A1
24#define C7 A2
25#define C8 A3
26
27int pause=300;
28
29
30  int Cat
31  [8] [8] ={
32  {1,0,0,0,1,0,0,0},
33  {1,1,1,1,1,0,0,0},
34  {1,0,1,0,1,0,0,0},
35
36  {0,1,1,1,0,0,0,1},
37  {0,0,1,0,0,0,0,1},
38  {0,1,1,1,1,0,0,1},
39  {0,1,1,1,1,1,0,1},
40
41  {1,0,1,1,1,1,1,0},
42  };
43
44void setup() {
45   pinMode(R1, OUTPUT);
46
47   pinMode(R2, OUTPUT);
48   pinMode(R3, OUTPUT);
49   pinMode(R4, OUTPUT);
50
51   pinMode(R5, OUTPUT);
52   pinMode(R6, OUTPUT);
53   pinMode(R7, OUTPUT);
54
55   pinMode(R8, OUTPUT);
56   pinMode(C1, OUTPUT);
57   pinMode(C2, OUTPUT);
58
59   pinMode(C3, OUTPUT);
60   pinMode(C4, OUTPUT);
61   pinMode(C5, OUTPUT);
62
63   pinMode(C6, OUTPUT);
64   pinMode(C7, OUTPUT);
65   pinMode(C8, OUTPUT);
66
67
68  digitalWrite(R1,HIGH);
69  digitalWrite(R2,HIGH);
70  digitalWrite(R3,HIGH);
71
72  digitalWrite(R4,HIGH);
73  digitalWrite(R5,HIGH);
74  digitalWrite(R6,HIGH);
75
76  digitalWrite(R7,HIGH);
77  digitalWrite(R8,HIGH);
78  digitalWrite(C1,LOW);
79
80  digitalWrite(C2,LOW);
81  digitalWrite(C3,LOW);
82  digitalWrite(C4,LOW);
83
84  digitalWrite(C5,LOW);
85  digitalWrite(C6,LOW);
86  digitalWrite(C7,LOW);
87
88  digitalWrite(C8,LOW);
89}
90
91
92
93void SelectRow(int row){
94  if (row==1)
95  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
96  if (row==2) digitalWrite(R2,LOW);
97  else digitalWrite(R2,HIGH);
98  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);
99
100  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
101  if (row==5)
102  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
103  if (row==6) digitalWrite(R6,LOW);
104  else digitalWrite(R6,HIGH);
105  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);
106
107  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
108}
109
110void
111  Set_LED_in_Active_Row(int column, int state){
112  if (column==1) digitalWrite(C1,state);
113  
114  if (column==2) digitalWrite(C2,state); 
115  if (column==3) digitalWrite(C3,state);
116  
117  if (column==4) digitalWrite(C4,state); 
118  if (column==5) digitalWrite(C5,state);
119  
120  if (column==6) digitalWrite(C6,state); 
121  if (column==7) digitalWrite(C7,state);
122  
123  if (column==8) digitalWrite(C8,state); 
124}
125
126void loop() {
127
128
129
130    for (int j=0;j<8;j++){
131    SelectRow(j+1);
132      for (int i=0;i<8;i++){
133
134        Set_LED_in_Active_Row(i+1 ,Cat[j][i]);
135      }
136      delay(2+pause);
137
138    }
139if(pause!=0 and pause>100)pause=pause-100;
140if(pause!=0 and pause<=100)pause=pause-10;
141}
142

// Mario's ideas
// Displaying cat image on 8x8 LED Matrix (Multiplexing)

//
  Raws 
#define R1 2
#define R2 3
#define R3 4
#define R4 5
#define
  R5 6
#define R6 7
#define R7 8
#define R8 9
//Columns
#define C1
  10
#define C2 11
#define C3 12
#define C4 13
#define C5 A0
#define
  C6 A1
#define C7 A2
#define C8 A3

int pause=300;


  int Cat
  [8] [8] ={
  {1,0,0,0,1,0,0,0},
  {1,1,1,1,1,0,0,0},
  {1,0,1,0,1,0,0,0},

  {0,1,1,1,0,0,0,1},
  {0,0,1,0,0,0,0,1},
  {0,1,1,1,1,0,0,1},
  {0,1,1,1,1,1,0,1},

  {1,0,1,1,1,1,1,0},
  };

void setup() {
   pinMode(R1, OUTPUT);

   pinMode(R2, OUTPUT);
   pinMode(R3, OUTPUT);
   pinMode(R4, OUTPUT);

   pinMode(R5, OUTPUT);
   pinMode(R6, OUTPUT);
   pinMode(R7, OUTPUT);

   pinMode(R8, OUTPUT);
   pinMode(C1, OUTPUT);
   pinMode(C2, OUTPUT);

   pinMode(C3, OUTPUT);
   pinMode(C4, OUTPUT);
   pinMode(C5, OUTPUT);

   pinMode(C6, OUTPUT);
   pinMode(C7, OUTPUT);
   pinMode(C8, OUTPUT);


  digitalWrite(R1,HIGH);
  digitalWrite(R2,HIGH);
  digitalWrite(R3,HIGH);

  digitalWrite(R4,HIGH);
  digitalWrite(R5,HIGH);
  digitalWrite(R6,HIGH);

  digitalWrite(R7,HIGH);
  digitalWrite(R8,HIGH);
  digitalWrite(C1,LOW);

  digitalWrite(C2,LOW);
  digitalWrite(C3,LOW);
  digitalWrite(C4,LOW);

  digitalWrite(C5,LOW);
  digitalWrite(C6,LOW);
  digitalWrite(C7,LOW);

  digitalWrite(C8,LOW);
}



void SelectRow(int row){
  if (row==1)
  digitalWrite(R1,LOW); else digitalWrite(R1,HIGH);
  if (row==2) digitalWrite(R2,LOW);
  else digitalWrite(R2,HIGH);
  if (row==3) digitalWrite(R3,LOW); else digitalWrite(R3,HIGH);

  if (row==4) digitalWrite(R4,LOW); else digitalWrite(R4,HIGH);
  if (row==5)
  digitalWrite(R5,LOW); else digitalWrite(R5,HIGH);
  if (row==6) digitalWrite(R6,LOW);
  else digitalWrite(R6,HIGH);
  if (row==7) digitalWrite(R7,LOW); else digitalWrite(R7,HIGH);

  if (row==8) digitalWrite(R8,LOW); else digitalWrite(R8,HIGH);
}

void
  Set_LED_in_Active_Row(int column, int state){
  if (column==1) digitalWrite(C1,state);
  
  if (column==2) digitalWrite(C2,state); 
  if (column==3) digitalWrite(C3,state);
  
  if (column==4) digitalWrite(C4,state); 
  if (column==5) digitalWrite(C5,state);
  
  if (column==6) digitalWrite(C6,state); 
  if (column==7) digitalWrite(C7,state);
  
  if (column==8) digitalWrite(C8,state); 
}

void loop() {



    for (int j=0;j<8;j++){
    SelectRow(j+1);
      for (int i=0;i<8;i++){

        Set_LED_in_Active_Row(i+1 ,Cat[j][i]);
      }
      delay(2+pause);

    }
if(pause!=0 and pause>100)pause=pause-100;
if(pause!=0 and pause<=100)pause=pause-10;
}

Downloadable files

Connecting 8x8LED Matrix to Arduino

Documentation

STL files for Matrix Holder and Diffusion Panel

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mdraber

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