# How to Fill the binary in the Truth Table

Discussion in 'Homework Help' started by wesam82, Mar 10, 2013.

1. ### wesam82 Thread Starter New Member

Mar 10, 2013
3
0
Hi
If I have a decimal for example 671 which is in binary 0110 0111 0001
How to fill the binary in the Truth Table as output

A B C - ***Output***
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
1 0 0
1 0 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 1
1 1 1

2. ### WBahn Moderator

Mar 31, 2012
18,088
4,917
Your question in nonsensical. What relationship is there between the (wrong) binary pattern for a particular decimal number and the truth table for a function with three inputs?

And why have you repeated each input combination twice?

3. ### wesam82 Thread Starter New Member

Mar 10, 2013
3
0
Sorry, You are right. The question is : a. Draw a truth table for the logic of the system and derive an un-simplified Boolean expression in Sum-of-products form.

4. ### MrChips Moderator

Oct 2, 2009
12,646
3,458
Come again. Your question makes no sense.

5. ### WBahn Moderator

Mar 31, 2012
18,088
4,917
The logic of WHAT system?

6. ### StayatHomeElectronics Well-Known Member

Sep 25, 2008
864
40
You have yet to state what the system is. You have just given an example that seems totally unrelated with the truth table you want filled in.

7. ### wesam82 Thread Starter New Member

Mar 10, 2013
3
0
It is an alarm system in which if the bit is 1 then the alarm will be activated

8. ### WBahn Moderator

Mar 31, 2012
18,088
4,917
Now you throw out yet another piece of information that has no apparent relationship to the others.

Either provide a clear statement of what you are trying to do, or I will simply conclude that you are a troll on a fishing expedition and move on to posters that actually want to learn something.

9. ### StayatHomeElectronics Well-Known Member

Sep 25, 2008
864
40
Must be
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
as the output then.