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8 bit decoder

Discussion in 'Electronic Design' started by [email protected], Feb 15, 2007.

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  1. Guest

    hi !
    i am working on a circuit and i need to decode 8 bit binary number to
    show that number to 7 segment BCD display.How can i do that ????
  2. Dave Pollum

    Dave Pollum Guest

    If you want to display BCD data (0 thru 9) on a 7-segment display,
    something like a 7447 or CD4511 (or their modern equivalents) would
    work. For 8-bits, you'll need 2 chips and 2 LED displays. If you
    want to display hexadecimal (0 thru F), check out the Maxim ICM7212 (4
    digits). I found the Maxim part by googling for "7-segment driver".
    -Dave Pollum
  3. With a PIC, of course.

    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
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  4. samiam

    samiam Guest

    I am doing something like this RIGHT NOW on a project I am working on.

    I have two 16L8 PLD's and a table to decode the hex values.
    I split the data bus into two nibbles and feed each to the PLD. The PLD
    outputs drive the seven segments ... works like a charm
  5. Rich Grise

    Rich Grise Guest

    If he wants a BCD display, he'll need three digits to cover the range

  6. Andrew Edge

    Andrew Edge Guest

    Your 7 segment BCD display accepts 4 bits of data.

    You have 8 bits which means you need 2 of them.

    A decoder. Ummmm. You could do without one. Get a 8 BIT Serial IN
    Parallel OUT Shift register Chip. Connect the outputs to your 2 BCD
    display chips.

    You could get the same result by cascading 8 flipflops instead of the
    shift register.

  7. cs200939


    Nov 20, 2010
    I am stuck with the same problem.i have constructed a Fibonacci generator and the output is an 8 bit number.i attained this output with the help of two 4 bit binary adders and now i am stuck with the problem of displaying them on two 7 segments displays. Until now ive worked with only 1 7 segment display( i mean i know how to display 0 to 9 but dont know how to display 0 to 99:( ).Can anybody help me with that please.In detail.Thanks
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