Karno Maps for Seven Segment Display Circuits - CAPSULE Spelling Exercise

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SUMMARY

The discussion focuses on creating a Karnaugh map for a seven-segment display circuit to spell the word "CAPSULE" using three inputs (A, B, C) and seven outputs (a, b, c, d, e, f, g). The provided Karnaugh maps yield simplified Boolean expressions for each segment, with specific errors identified in the user's expressions. The correct expressions include A' + B for segment 'a' and A'C + BC + A(BC)' for segment 'c'. The user seeks assistance in constructing the circuit and clarifying the use of reflected Gray code for binary inputs.

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fallen186
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Homework Statement


Three input and seven output. Do the karno map.
This is suppose to be a seven segment display ( like the ones in digital clocks.) I am suppose to spell a word. My word was CAPSULE. I got an error and I can't trace it.


CAPSULE:

A B C | a | b | c | d | e | f | g |
---------------------------------------
0 0 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 |
0 0 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
0 1 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 |
0 1 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
1 0 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
1 0 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
1 1 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
1 1 1 | x | x | x | x | x | x | x |

Karno map
a
1 | 1 | 1 | 0
1 | 1 | x | 0

= A' + B

b
0 | 1 | 0 | 1
1 | 0 | x | 0

= (AB)'C + A'BC'+ A(BC)'

c
0 | 0 | 0 | 1
1 | 1 | x | 0

= A'C + BC + A(BC)'

d
1 | 0 | 1 | 1
0 | 1 | x | 1

=A + BC + (BC)'

e
1 | 1 | 1 | 1
1 | 0 | x | 1

= C' + B'

f
1 | 1 | 1 | 1
1 | 1 | x | 1

F = 1
** By the way how do I make a circuit of this. I orginally did A' + A

g
0 | 1 | 1 | 0
1 | 1 | x | 0

= B + A'C

Any help will make me greatful

 
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Is the word CAPSULE to be spelled out as the binary inputs cycle in order from 0 through 6?

I haven't done Karnaugh maps for an age but as I recall, don't you want to list the binaries under ABC as a reflected gray code? And the answer to f is just connect that input to vc.

Also, for example in your expression for b, where you write expressions like (AB)'C, where apparently you mean A'B'C, those expressions aren't equal and your expression isn't correct.
 
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