7 LED Segment

Thread Starter

rfjanck

Joined Oct 24, 2024
4
Hi, I'm struggling to finish this exercise. I should output my last 6 student ID numbers followed by 24. My doubt is when I have two equal values on truth table, what I should do? I'm posting the truth table, equations and the circuit. The last "1", "8" and "4" numbers displayed aren't being shown as it should.

I have made some research on the website, I found an explanation using "kmaps" but I didn't have any lesson about it.
Some rules:
• Use only logic gates AND, OR, NOT, NAND and NOR to simulate the counter.
• You should use 3 sequencers or bit generators in your circuit as input
• The numbers should change automatically without any user intervention.
• Your circuit should be simplified (unused and repeated gates should be removed from the final
design)
 

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Thread Starter

rfjanck

Joined Oct 24, 2024
4
You didn't follow the instructions. Your first 2 numbers are 2 and 4, not the last 2. Is your ID 131864?

Post your kmaps.
Sorry, I have given wrong information. The number 24 (this year) should be followed my last 6 id number digits that is: 131864. I didn't have any class about kmaps as I mentioned, it is very new for me. I'm posting the circuit screenshot and truth table again. (Not sure if equations for "g" segment is correct) I'm struggling to fix the first number 1, that is showing up the g segment, the second number 1 is correct. I have no idea how to sort it.

need_to_fix_1.jpg
 

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dl324

Joined Mar 30, 2015
18,219
I'm struggling to fix the first number 1, that is showing up the g segment, the second number 1 is correct. I have no idea how to sort it.
I don't follow your logic for segment 'g'. You seemed to be trying to write a POS expression, but didn't get it right.
 
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