Karnaugh Maps with 4 Variables

This video follows on from the previous introduction to Karnaugh maps. It covers creating a Karnaugh map for a logic circuit, or truth table, with 4 inputs, and how to use a 4 variable K-map to derive a minimised Boolean expression.

[@aathi2255]

Mate, I don't find no better video than this. You're helping out poor engineering students😂. Thanks for the help!

[@eddie-dx8qm]

i dont understand what happened to variable B here how come it was not included ? is it because it changes ? 2:10

[@hk254lyt8]

Computer Science students too😅

[@stravinskyfan]

​@@eddie-dx8qm yes, you can only include 11 or 00

[@SuburbanDon]

This is the simplest and clearest explanation I've seen yet ! Good show !

[@ComputerScienceLessons]

You're very kind. Thank you :)KD

[@prestonparker7321]

You need to make more videos on everything, the way that you describe and explain is perfect.

[@TareEbelo]

Mid-term tomorrow, you just gave me hope, thank you.

[@ComputerScienceLessons]

The very best of luck to you. :)KD

[@ruvinagunasinghe3724]

same

[@YoAirFresh]

Golden voice.

[@ComputerScienceLessons]

Kind of you to say so. I've bought a new Blue Yeti since I made this - it picks up my heart beating and my stomach gurgling now.

[@absort187]

A tip for the last one which actually makes it a lot easier is to instead of grouping the ones, group the zeroes and then inverse them. What you will get when grouping the zeroes is D A B' and inverted will be your answer of D' A' B following De Morgan laws

[@AviPars]

Or do POS

[@yumied1ts]

imna use it for the exam tysm🔥

[@olalha7198]

Brilliant video, much better than the university lecture I pay thousands for...

[@ComputerScienceLessons]

Thank you. :)KD

[@techliteracy6111]

Who else got exams tomorrow 😂😂

[@anthonyalikah1856]

I have a test later today 😂

[@nancymambwe5199]

At 09AM today 💀😂🥲

[@L_aurora_X]

2pm today

[@glacier8678]

Me!

[@MichaelOmisore-no2js]

Right here man😂

[@isukim2267]

Thanks, this helped me a lot. I could not understand how to group 1s, after watching this video, now I can!

[@ComputerScienceLessons]

Glad it helped! Thanks for the comment. :)KD

[@edmondscott7444]

Very well explained sir. I have found your videos very useful. I have recently tutored a college student. I had no prior knowledge of K-maps.

[@SoleSoulSeoul]

Wonderful video, very well explained. Thank you.

[@alexandru-mariosidor7980]

Thank you for your work sir, you really helped me a lot in understanding Karnaugh maps, much better than my university teacher

[@ComputerScienceLessons]

Delighted to be of service :)KD

[@Naz-yi9bs]

Why are the columns 00 01 11 10, shouldn't it be 00 01 10 11? Thank you for the video.

[@ComputerScienceLessons]

The trite answer is that K maps use Gray code rather than binary numerical order because it makes grouping possible (Yes! I just said "because it makes it work" - sorry). If you are interested there are lots of articles and posts on WHY this is the case, but you may need to dig around to understand the terminology. I like this post electronics.stackexchange.com/questions/161888/why-does-the-karnaugh-map-use-gray-code-and-not-binary :)KD

[@gbilo24]

Thanks a lot. So well explained!

[@stravinskyfan]

literally forgot about k maps rules etc. and finals is literally in 30 mins. thanks a lot only in 5 minutes I remember everything

[@stravinskyfan]

update: did very well on the test, thanks

[@veganath]

Does Kevin mean that each input value ONLY changes a bit at a time and not sequential 2-bit binary & is deliberately not used? E.g. 00, 01, 11, 10 and not 00, 01, 10, 11

[@reddit-s7e]

minterm 1 is active then why isnt the box in the K-map have 1, it shows minterm 3 active where in actual its not? maybe im not understanding this right? i had this question but then i saw that it is from top to bottom while we were taught left to right

[@wolframalpha8634]

You are awesome!👍

[@ComputerScienceLessons]

Lovin' the name

[@wolframalpha8634]

@@ComputerScienceLessons it's not mine Tho :) but thanks!

[@dezcraft_dev]

Would it be possible to count the 0s instead of 1s and then prefix the whole statement with a not?

[@tendaijakutindi4175]

Thank you!

[@ComputerScienceLessons]

You're welcome :)KD

[@niranjisaroji9244]

Sir how to find the F value?

[@konstantinosiordanidis1145]

F value depends on whether or not the number that the other 4 variables represent, exists in the sum of minterms (Σm(0,1,2,3 ...)).

[@AviPars]

Do you have a 5 var one ??

[@furkanyldz7924]

can we take 0 and 10 together

[@bropharah7748]

Very helpful

[@ComputerScienceLessons]

Thank you :)KD

[@mgdy8163]

Thank god i found gem

[@ComputerScienceLessons]

appreciated :)KD

[@cr0cop738]

thank you so much!

[@aminaziz8309]

Thank you

[@banda20549]

Best One ever

[@ibraheemnassar7024]

👌

[@ComputerScienceLessons]

:)KD

[@MrXenon-hn7ju]

Goddamn Scotland Yard Stud

[@JINTIHAZARIKAIITR]

If it is an 'and' operation between variables, then I think it doesn't matter whether I write AB or BA kzbin.info/www/bejne/j3u2opmVj5Vlatk

[@ComputerScienceLessons]

Indeed. The AND operation as well as the OR operation are both commutative. kzbin.info/www/bejne/e4Gtl2elrNaqmqM :)KD

[@Horizon.6s]

I love you

[@ComputerScienceLessons]

Love you too :)KD

[@Memzee.1]

Have an exam in 30min

[@youngg327]

Obolobo

[@ComputerScienceLessons]

Should I take that as a complement?

[@fatemeh_shokry2845]

فاطمه شکری_۹۹۱۲۰۳۸

[@Acoustic_Mutale]

Who else is here for EEE 3131 ? UNZA student anyone?