
#1
Sep2310, 12:34 AM

P: 2

1. The problem statement, all variables and given/known data
Here's the problem: Design a logic network that can display the characters in “APPLE” on a sevensegment display unit. Write the truth table for the output functions C0C6, minimize them by using Karnaugh Map, and implement using discrete logic gates. (Hints: Character “A” will be displayed if segments (C0, C1, C2, C4, C5, C6) of a 7 segment display are turned on and segment (C3) is turned off. Since only 4 characters will be displayed, input of 2 bits to encode them will be needed for the given design.) Now, where I get confused is when it says an input of 2 bits to encode them will be needed. I understand that technically only 2 bits are needed, but I do not understand how to implement it using only 2 instead of 4. I've been searching and thinking of different ways to do it but I am stumped. 2. Relevant equations Not quite applicable 3. The attempt at a solution With 2 bits to work with: 00 = A 01 = P 10 = L 11 = E
Any help will be greatly appreciated! Thanks 



#2
Sep2310, 12:39 PM

Mentor
P: 39,722

Everything you've done looks correct. Now just do the 7 Kmaps (or just write the 7 equations) that define the logic that drives the 7segment displays. The same logic is repeated at each display, and drives the 7 segments based on that 2bit input AB. BTW, I edited your post to insert Code tags around your table. This preserves the column alignment. 



#3
Sep2410, 12:26 AM

P: 2

Thanks a million berkeman, I think I got it all figured out!



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