How to show 8 bit binary number to 7 segment bcd display ????
An eight bit binary number ranges from 0 to 255 (decimal) so you will need
three 7-segment diplays to show the eight bits number in BCD.
There are some solutions but as you didn't give any constraints it's hard to
tell which one will suit you.
If you need one off and space is not a problem, a quick and dirty solution
is programming three old EPROMs like the infamous 2764. As maybe the EPROMs
cannot provide enough power to drive the LEDs of the display you may have to
put drivers or transistors between the EPROMs and the displays.
Likewise you can use GALs although you may run into a fitting problem.
You can go for a two stage solution. Use EPROMs or GALs to convert from
binary to BCD and standard BCD to 7-segment decoders/drivers, like the
CD4511, to convert BCD to display.
You can program a PIC16F870 or similar for the conversion and multiplexing
of the three displays.
The biggest solution I can think about is a PC with an EPP or other
bidirectional parallel port. Read the eight bits from the port and display
the number on the screen. An old DOS machine and one line in GWBASIC will do
the trick.
(You can use a mainframe as well but I expect real space and power problems
in that case.)
petrus bitbyter