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Science Forum Index » Electronics - Design Forum » 8 bit decoder
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| Guest |
 Posted: Thu Feb 15, 2007 7:25 am |
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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 ???? |
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| Dave Pollum |
| Posted: Thu Feb 15, 2007 10:54 am |
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On Feb 15, 6:25 am, heman_too_c...@yahoo.co.in wrote:
Quote: 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 ????
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".
HTH
-Dave Pollum |
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| Don Lancaster |
| Posted: Thu Feb 15, 2007 12:01 pm |
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| samiam |
| Posted: Thu Feb 15, 2007 1:31 pm |
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heman_too_cool@yahoo.co.in wrote:
Quote: 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 ????
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 |
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| Rich Grise |
| Posted: Thu Feb 15, 2007 6:03 pm |
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On Thu, 15 Feb 2007 17:31:03 +0000, samiam wrote:
Quote: heman_too_cool@yahoo.co.in wrote:
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 ????
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
If he wants a BCD display, he'll need three digits to cover the range
0..255.
Cheers!
Rich |
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| Andrew Edge |
| Posted: Fri Feb 16, 2007 11:15 am |
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On 15 Feb 2007 03:25:14 -0800, heman_too_cool@yahoo.co.in wrote:
Quote: 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 ????
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.
Andy |
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