i am thinking that 16 decimal inputs (switches) can be converted to single hexadecimal digit, unless you were needing to use zero. can you describe your "operational criteria" a little more?It is composed of 16 inputs(for the swithes) as for a decimal then converted to hexadecimal 8 outputs
I would not call a switch a decimal input, I'd call it a binary input. If you mean that each switch stands for a different hexidecimal digit and you want to decode one of sixteen inputs into a single hexadecimal digit then that is a bit clearer.i am thinking that 16 decimal inputs (switches) can be converted to single hexadecimal digit, unless you were needing to use zero. can you describe your "operational criteria" a little more?
yeah that's right... each switches are inputs of decimals....and to show it's conversion to hexa, we need to show it in a 7 segment display just what my prof told to us...that's exactly what i was meaning to say, but i was implying that each switch represented a decimal input, not hexadecimal. but we are only stabbing at daveglion's intentions
yeah exactly..i suppose then that you may be looking for devices that encode your (16) decimal switches to hexadecimal, and then another to latch (if needed) and drive the 7 segment.
yup! my prof is such a monster!!!!If you are unwilling to simply use a PIC or EPROM or some such, then you must begin with a huge truth table and/or boolean expression. List the output states as a function of the input states. Look for patterns in the table or the expression. Adapt these to making your circuit.
Also: you can't do this with 16 input lines of binary coded decimal and only 8 o/p lines for hexadecimal. 9999dec = 270Fhex, so you'll need sixteen output lines instead of eight. These 16 lines would then control your display drivers, which in turn would light your displays.
This project is very complex for a beginner (unless using PIC or EPROM or such) and I am surprised an instructor would assign such a monster.
Ei Sir sorry for the late reply...just got busy this days...Rite !!!!You sound desperate now.....Do this with an EPROM and 2 x CD4511's...I will work it out for you today, post a schematic tomorrow and if you wish to go that way, I will program you up an EPROM and stick it in the post for you...Daniel.
Anyway Sir tnx for the help....Rite !!!!You sound desperate now.....Do this with an EPROM and 2 x CD4511's...I will work it out for you today, post a schematic tomorrow and if you wish to go that way, I will program you up an EPROM and stick it in the post for you...Daniel.