Design a logic circuit that accepts BCD inputs (0-9) and outputs a logic that would drive a 7 segment display.

Question

Hello to all avid users of yahoo. This problem has these design processes in order: specification, immediate expression, simplification, simplified expression, logic diagram, and evaluation. This problem is related to the LCD as seen on many ordinary calculators. Pls I really need help on this guys. Thank u

Answer 1

Its very easy you can get it diagram bye looking up the "BCD to 7segment IC TTL7447"
but if you like to design it just make a table and in the left write the numbers from 1-9 and in he top left write the "a b c d e f g "
which are the numbers of 7seg led if you dont know which one is a b c.. you can search it n databooks (eg for number 1 let "e and f" 1 and others make 0 ) and then try to write the minterm of any led seprately !
http://www.electronics-lab.com/downloads/datasheets/ttl.html

Answer 2

What technique did you employ to simplify? As referred to, you could continually replica somebody else's hard artwork, yet I presume the article of doing the challenge is so as which you learn some thing. And judging out of your adventure for this reason a techniques, you're possibly to undergo in techniques it, so sturdy for you! to symbolize 0-36 you will need fourteen purposes of six bits, which it appears that evidently such as you have have been given. which ability the only subject must be in the fact table, or regardless of in case you simplified it. Simplifying a functionality in six bits is a handful, so in case you do not desire to do each and all of the algebra i desire to recommend you get your self a replica of coffee, a good judgment minimizer that runs on homestead windows or Unix. The hyperlink is below. there is particularly no reason you could desire to attempt to decrease better than 4 variables by ability of hand. Your different determination is to create a decimal-to-BCD converter (it is 8 purposes of six bits, quite much less artwork) and use that tocontinual 2 same BCD-to-7-section converters (seven purposes of four bits, a chew of cake). ultimately, you ought to get your self a pair packs of diodes, and build your self a 14x37 bit ROM. this could require no minimization in any respect.

Answer 3

There are ICs specifically made to do this. Look for the data sheets for those ICs. This sounds too much like a digital design homework problem.

However, to save power I would suggest using a PWM.