Code
// 2-dimensional array of row pin numbers:
int R[] = {2,7,A5,5,13,A4,12,A2};
// 2-dimensional array of column pin numbers:
int C[] = {6,11,10,3,A3,4,8,9};
unsigned char biglove[8][8] = //the big “heart”
{
0,0,0,0,0,0,0,0,
0,1,1,0,0,1,1,0,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
0,1,1,1,1,1,1,0,
0,0,1,1,1,1,0,0,
0,0,0,1,1,0,0,0,
};
unsigned char smalllove[8][8] = //the small “heart”
{
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,
0,0,1,0,0,1,0,0,
0,1,1,1,1,1,1,0,
0,1,1,1,1,1,1,0,
0,0,1,1,1,1,0,0,
0,0,0,1,1,0,0,0,
0,0,0,0,0,0,0,0,
};
void setup()
{
// iterate over the pins:
for(int i = 0;i<8;i++)
// initialize the output pins:
{
pinMode(R[i],OUTPUT);
pinMode(C[i],OUTPUT);
}
}
void loop()
{
for(int i = 0 ; i < 100 ; i++) //Loop display 100 times
{
Display(biglove); //Display the “Big Heart”
}
for(int i = 0 ; i < 50 ; i++) //Loop display 50 times
{
Display(smalllove); //Display the “small Heart”
}
}
void Display(unsigned char dat[8][8])
{
for(int c = 0; c<8;c++)
{
digitalWrite(C[c],LOW);//use thr column
//loop
for(int r = 0;r<8;r++)
{
digitalWrite(R[r],dat[r][c]);
}
delay(1);
Clear(); //Remove empty display light
}
}
void Clear()
{
for(int i = 0;i<8;i++)
{
digitalWrite(R[i],LOW);
digitalWrite(C[i],HIGH);
}
}
Circuit diagram
Info_Arduino 