Question

b) Flashing LEDs are to be designed for decoration. There is a total of 7 LEDs controlled by a switch. It works such that

1. When S=0, the LEDs are turned ON one after the other beginning from 1 to 7. When the LEDs flash in this manner the 3rd LED is skipped.

2. When S=1, the LEDs are turned ON one after the other but now beginning from 7 to 1.

When the LEDS flash in this manner the 4th LED is skipped.

For the above scenario do the following:

• Determine the State Table

• Draw the Circuit Diagram It must be described that which state represents what and a clear description of the state table and circuit diagram in words.

No credit will be given for solutions without explanations.

Answer 1

Besigning Logic for given Senosio Stoatagy: > Y'd like to design counts from 1 to 7 and 7 to I Based on s a countor And then y would like to use a 8:8 decodur for blinking Light (with Enable) y have to derive a logic for Enable to be low when god led to be off for up cound and 4th one to be off when it's a docen count design of a counter

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K-map Solvation for DA CBR CBuc ar cars QC 300 SGA SOSA S७० 0 1 O DAZ 500 GB + OBOC 5 + 5036 GB 04-8B C + 300 83 De = 5 B6+09) + GB (SA) QO OB OC (... AB+BA. HOB -map for DB

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3:8 dodh SUBCAA +CD+ 68(SO 19)+60 QRACT DA 0 circuit cer UB za 3 5 C8B+QFOBAC+ ScoB DB cec CQC pa 1 D -Do-beneble 3033 (@+C+ COOBOX +G CART DC cik

This all ok how gona circuit work & when s=0 it count & from ool to 11, since decoder ilp changing lights are blinking one by one * when at S=0, oll baid on the logic Enable is low lead & no led blinka * when sal it counts foom 11 to ool sine droch alps changed 6d8 blink from down * when at sal and 4th the logic disable & Eneble and no light blinked Thek you!

Here I have given state table and circuit diagram along with k-map solvation. Please notice that I have given the block diagrams instead of connecting them for the purpose of simplicity. When I connect them it might be clumsy.

If you have any queries please feel free to comment.

If you are satisfied with my work please UPVOTE.

Thank you.!