1. //código para letras con lets
Int a=50;
Index=0;
Intdato[7][1]={
{B00000001},
{B00000010},
{B00000100},
{B00001000},
{B00010000},
{B00100000},
{B01000000}
};
Intb[21][1]={
{B001111},
{B001001},
{B101111},
{B101001},
{B101001},
{B101001},
{B101001},
{B001111},
{B001001},
{B101001},
{B101010},
{B101111},
{B101001},
{B101111}
{B001111},
{B001000},
{B101000},
{B101000},
{B101000},
{B101000},
{B101111}
esta matriz es para la letra A
//A 0
//B 7
//C 14
};
DDRD=B11111111;
DDRB=B111111;
}
If(Index==21)
Index=0;

2. For(int j=; j<=10; j++) //es para k lo muestre fijamente
for(int i=0; i<=6; i++)
PORTD=dato[i][0];
PORTB=b[i+index][0];
delay(a);
index=index+7;