Carno table problem

Thread Starter

emicho

Joined Apr 9, 2012
5
Hello guys,
I need to design a digital circuit which have five inputs " A,B,C,D,E"
and one output..
the output should be "1" when the input is a prime number
please I need you to helps me to find the reduced equation of the output
"using Carno table"...
 
Last edited:

John P

Joined Oct 14, 2008
2,025
Of course you checked to see what English-language answers come up when you look online for <carno table>. Knowing what your readers here would be likely to do.

You did, right?
 

Thread Starter

emicho

Joined Apr 9, 2012
5
Hey!!!
I think I miss understand what you have said
I really have a problem with carno table which is the map method which we use to simplify a boolean function...
please I need help with my problem
 

John P

Joined Oct 14, 2008
2,025
Oops. Well, my spelling is close enough to get you to the right place. However, I was able to get there and not notice that I had it wrong. Not too observant, sorry.

Anyway, how does this relate to prime numbers?
 

tshuck

Joined Oct 18, 2012
3,534
Karnaugh maps begin to get difficult to use past 4 variables, but 5 is certainly doable.. Have a look here before you begin...

Now, once that is out of the way, draw your K-map and put a 1 wherever the output should be a 1, corresponding to your input variables... So, you will eventually come to a Boolean expression for determining prime numbers....
 

Thread Starter

emicho

Joined Apr 9, 2012
5
Thanks Guys, I have some PDF about it but the problem: I don't have time to read all this and I need your help to get the reduced equation of the output
"using Carno table" so that I can draw the digital circuit and I shout finish it today,

Thanks for all of you friends...
 

Papabravo

Joined Feb 24, 2006
21,159
Sorry. We were not put here to do your work for you. You absolutely must make an effort. We are here to help, but you need to do the work. Understand?
 

tshuck

Joined Oct 18, 2012
3,534
Thanks Guys, I have some PDF about it but the problem: I don't have time to read all this and I need your help to get the reduced equation of the output
"using Carno table" so that I can draw the digital circuit and I shout finish it today,

Thanks for all of you friends...
I'm afraid that if you don't have time to understand your problem, you don't have time to come to a solution.....
 

vpoko

Joined Jan 5, 2012
267
You can use Mathematica or Wolfram Alpha to reduce boolean functions to a minimal form. Of course, if you have to use Karnaugh maps and show your work, you'll be out of luck.
 

spinnaker

Joined Oct 29, 2009
7,830
Thanks Guys, I have some PDF about it but the problem: I don't have time to read all this and I need your help to get the reduced equation of the output
"using Carno table" so that I can draw the digital circuit and I shout finish it today,

Thanks for all of you friends...
Sorry. We were not put here to do your work for you. You absolutely must make an effort. We are here to help, but you need to do the work. Understand?
I'm afraid that if you don't have time to understand your problem, you don't have time to come to a solution.....


Sounds like someone's homework is due soon. ;)
 

WBahn

Joined Mar 31, 2012
29,978
Thanks Guys, I have some PDF about it but the problem: I don't have time to read all this and I need your help to get the reduced equation of the output
"using Carno table" so that I can draw the digital circuit and I shout finish it today,

Thanks for all of you friends...
As pointed out by others, an attitude like this will not get you very far here. But, more important, it will not get you far in your goal of learning anything (if, in fact, that actually is one of your goals) and it will not serve you well as an engineer. So if this is going to be the way you operate, get the hell out of engineering, both for your own sake and the sake of the people you will otherwise almost certainly get killed sooner or later.

Now, should you be interested in getting your act together, consider the following questions on this problem:

Q1) How do the lettered inputs, A, B, C, D, and E, map to a number (which is then either prime or not)?

Q2) How many possible input combinations are there that need to be dealt with?

Q3) How many combinations need to produce a '1' output?

Q4) Are any of the inputs always (or nearly always) in a particular state when the output is '1'?

Q5) Might it be easier to identify the cases for which the output should be '0'?
 

ErnieM

Joined Apr 24, 2011
8,377
As pointed out by others, an attitude like this will not get you very far here. But, more important, it will not get you far in your goal of learning anything (if, in fact, that actually is one of your goals) and it will not serve you well as an engineer. So if this is going to be the way you operate, get the hell out of engineering, both for your own sake and the sake of the people you will otherwise almost certainly get killed sooner or later.
While this attitude may makes horrible engineer,it does strongly remind me of at least one engineering manager I've worked for.
 

WBahn

Joined Mar 31, 2012
29,978
While this attitude may makes horrible engineer,it does strongly remind me of at least one engineering manager I've worked for.
Yeah, I was strongly tempted to make some recommendations of fields he might want to consider. But I managed, barely, to refrain myself. ;)
 
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