Magic Eyes

1//Simply connect all the pins as shown in diagram
2//You need to connect  220 ohm resistor to save the led matrix.
3#define ROW_1 2
4#define ROW_2 3
5#define  ROW_3 4
6#define ROW_4 5
7#define ROW_5 6
8#define ROW_6 7
9#define ROW_7  8
10#define ROW_8 9
11
12#define COL_1 10
13#define COL_2 11
14#define COL_3  12
15#define COL_4 13
16#define COL_5 A0
17#define COL_6 A1
18#define COL_7  A2
19#define COL_8 A3
20
21const byte rows[] = {ROW_1, ROW_2, ROW_3, ROW_4, ROW_5,  ROW_6, ROW_7, ROW_8};
22
23//if you want to change the design, put your changes  in design line wise
24byte OPEN[] = 
25{
26  B00111100,                             //    ****  
27  B01000010,                             //   *    *
28  B10011001,                             //  *  **  *
29  B10111101,                             //  * **** *
30  B10111101,                             //  * **** *
31  B10011001,                             //  *  **  *
32  B01000010,                             //   *    * 
33  B00111100                              //    ****
34};
35
36byte  CLOSE[] = 
37{
38  B00111100,                             //    ****  
39  B01000010,                             //   *    *
40  B10000001,                             //  *      *
41  B10000001,                             //  *      *
42  B10000001,                             //  *      *
43  B10000001,                             //  *      *
44  B01000010,                             //   *    * 
45  B00111100                              //    ****
46};
47
48
49void setup() 
50{
51  Serial.begin(9600);
52  pinMode(2, OUTPUT);
53  pinMode(3, OUTPUT);
54  pinMode(4,  OUTPUT);
55  pinMode(5, OUTPUT);
56  pinMode(6, OUTPUT);
57  pinMode(7, OUTPUT);
58  pinMode(8, OUTPUT);
59  pinMode(9, OUTPUT);
60  pinMode(10, OUTPUT);
61  pinMode(11,  OUTPUT);
62  pinMode(12, OUTPUT);
63  pinMode(13, OUTPUT);
64  pinMode(A0, OUTPUT);
65  pinMode(A1, OUTPUT);
66  pinMode(A2, OUTPUT);
67  pinMode(A3, OUTPUT);
68
69  pinMode(A4, INPUT);
70}
71
72void loop() 
73{
74  if((digitalRead(A4))==0)
75  {
76    drawScreen(OPEN);
77  } 
78  else
79  {
80    drawScreen(CLOSE);
81  } 
82}
83
84void  drawScreen(byte buffer2[])
85{
86  // Turn on each row  in series
87  for (byte i = 0; i < 8; i++) 
88  {
89    setColumns(buffer2[i]);  // Set columns for this specific row
90    digitalWrite(rows[i], HIGH);
91    digitalWrite(rows[i],  LOW);
92  }
93}
94
95
96void setColumns(byte b) 
97{
98  digitalWrite(COL_1,  (~b >> 0) & 0x01); // Get the 1st bit: 10000000
99  digitalWrite(COL_2, (~b >>  1) & 0x01); // Get the 2nd bit: 01000000
100  digitalWrite(COL_3, (~b >> 2) & 0x01);  // Get the 3rd bit: 00100000
101  digitalWrite(COL_4, (~b >> 3) & 0x01); // Get  the 4th bit: 00010000
102  digitalWrite(COL_5, (~b >> 4) & 0x01); // Get the 5th  bit: 00001000
103  digitalWrite(COL_6, (~b >> 5) & 0x01); // Get the 6th bit: 00000100
104  digitalWrite(COL_7, (~b >> 6) & 0x01); // Get the 7th bit: 00000010
105  digitalWrite(COL_8,  (~b >> 7) & 0x01); // Get the 8th bit: 00000001
106  // If the polarity of your  matrix is the opposite of mine
107  // remove all the '~' above.
108}