You can double check your work using Boolean Algebra rules.

Can you factor such a Boolean expression?

 

View attachment 90953
Can you factor such a Boolean expression?

I'm learning too

 

Hello again, still working this problem (thanks for helping me with the B answer) but I still need to understand this. Like I said above, without "blackboard" learning, reading is tougher for me and you (WBahn) and shteii01 are my blackboards of sorts. This REALLY helps me! I hope the next file/pic is not too big. In this next one as the example of the book it gives 8 variables and this is where I thought I needed only 4 squares and now I see that I do really only need 8 squares. Pic to follow.

You don't have 8 variables, you have four -- they are: A, B, C, and D.

You have 8 input combinations for which the system output is HI -- that is NOT 8 variables!

For four variables you need sixteen squares. For this particular function, eight of them are filled with a 1 and the rest are filled with a 0.

Before you post a file, look at the size of it. Most pictures taken with phones and such today are huge. So open it in Paint (or similar software) and reduce the size. Scaling it to about 300 to 400 pixels wide usually does pretty good. You should try to get your images below 100 kB, though sometimes this isn't really possible.

 

You don't have 8 variables, you have four -- they are: A, B, C, and D.

You have 8 input combinations for which the system output is HI -- that is NOT 8 variables!

For four variables you need sixteen squares. For this particular function, eight of them are filled with a 1 and the rest are filled with a 0.

Before you post a file, look at the size of it. Most pictures taken with phones and such today are huge. So open it in Paint (or similar software) and reduce the size. Scaling it to about 300 to 400 pixels wide usually does pretty good. You should try to get your images below 100 kB, though sometimes this isn't really possible.

Hi, yeah I realized that after I wrote it that I need 4 instead of 8.
My phone was set on high resolution so need to turn that down when posting pics as well. Thanks!

 

Okay, I think I'm picking this up now. Now, with more practice I'll get sharper at it. Thank VERY MUCH WBahn and shteii01!!!!
Pic to follow, hope not too big a file.

Corey

I have NO idea where you came up with that K-map. You have four minterms in your starting expression, so there will be four squares that have a 1. You also completely messed up the mapping between the variables and their values. Below is the corrected K-map. Normally I wouldn't just give the solution, but you already know what the correct answer is, I think this might be the more effective way of getting the idea across, and it's obvious that this isn't a homework assignment that you are having to work and turn in.

 

An AH HA moment just happened. Confirring with an engineer i work with. I realize now what I did wrong.
I most likely will have the right answer with wrong diagrahm though.
It is homework on a lesson and will find out later today how bad I really did mess it up but now with your clarification and people i work with I now understand even more. Thank you.
Where I work I have elect engineers and they have gotten me on the right track as well. With everyone's help its getting in my head as to learning it better. All the learning input I can get is greatful. I want to learn it so I can just recite exactly the right things when asked as well as troubleshooting problems the right way.
Again, thank you very much.

 

Good luck, Corey.

 

Good luck, Corey.

Thank you! I need it.
Corey