Here is another hexadecimal desplay design, this time its only 3 blocks wide! I made this because all my other designs couldent be stacked right next to eachother and I think it looks much nicer if it can be stacked really close together.

the inputs work like this, each segment has 4 inputs stacked verticaly, they represent a binary number which you want to desplay, the top line is the 1 bit and the bottem line is the 8 bit the screen desplayes the following for the binary numbers

Binary - Decimal -  Hexadecimal (what the segment will show)
0000   -   0          -   0
0001   -   1          -   1
0010   -   2          -   2
0011   -    3         -   3
0100   -   4          -   4
0101   -   5          -   5
0110   -   6          -   6
0111   -   7          -   7
1000   -   8          -   8
1001   -   9          -   9
1010   -   10        -   A
1011   -   11        -    b
1100   -   12        -   C
1101   -   13        -   d
1110   -   14        -   E
1111   -   15        -   F

You can also make it say boobies if your imature like me, just get 7 of them stacked and power the inputs at the back as shown bellow... (1 is powered, 0 is not powered)

1   0   1   1   0   0   1
0   1   0   1   0   0   1
1   1   0   0   0   0   0
0   1   0   1   0   0   1