# Anyone know Boolean algebra Watch

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Hi,

I dont suppose anyone happens to be hot on Boolean algebra do they? I dont get the manipulations that you can perform to transfer to different types of logic gates. If anyone knows a how to do the below question or knows any good sites it would be very much appreciated.

using the notation A_ = not A:

rearrange the following expression so that it uses only NOT & NOR gates:

(a) A.B_.C_ + A_.B.C + A_.B_.C

(b) A_.B + A.B_

rearrange so that (b) contains only NOT & NAND functions.

As a hint I know that it uses De Morgan's Law and identities like X+0=0 & X.X_ = 1 but I have absolutely no idea how. Boolean algebra appears to be completely random & "illogical" to me. Thanks for any help you can provide.

I dont suppose anyone happens to be hot on Boolean algebra do they? I dont get the manipulations that you can perform to transfer to different types of logic gates. If anyone knows a how to do the below question or knows any good sites it would be very much appreciated.

using the notation A_ = not A:

rearrange the following expression so that it uses only NOT & NOR gates:

(a) A.B_.C_ + A_.B.C + A_.B_.C

(b) A_.B + A.B_

rearrange so that (b) contains only NOT & NAND functions.

As a hint I know that it uses De Morgan's Law and identities like X+0=0 & X.X_ = 1 but I have absolutely no idea how. Boolean algebra appears to be completely random & "illogical" to me. Thanks for any help you can provide.

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#3

(Original post by

A_.B + A.B_

**F1 fanatic**)A_.B + A.B_

((A_+B+C)_ + (A+C_))_ _

(I think anyway....kinda hard to work with this kind of format)

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#4

Out of interest you're not an Oxford Physicist who has Electronics Labs either tomorrow (Fri) or had them today? Just we have the exact same ones to solve!

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#5

Ooooo just checked your profile and you are indeed a fellow Oxon. What college are you from? If you're doing Electronic Labs tomorrow then u must be either from Keble or University...or I suppose you could be a fellow Lincolnite but as there's only 4 of us I think I would know if you were! Anyways, if you are in electronics 2moz then I'm the girl from Lincoln College who works with quite a loud and very tall guy (Henry, my lab partner) and will probably be sitting next to 2 other quiet guys (the other 2 Lincolnites).

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#6

Further update: Ooo, just found out your from Keble! Quite a few of you frequent this board...I know rich does too. I'm afraid I'm not sure which of the Keble Physicists you are though as there seems to be so many of you!

Anyways, I'll shut up now as I should be doing these Logic circuit exercises before I go to Thirst.

Anyways, I'll shut up now as I should be doing these Logic circuit exercises before I go to Thirst.

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(Original post by

Further update: Ooo, just found out your from Keble! Quite a few of you frequent this board...I know rich does too. I'm afraid I'm not sure which of the Keble Physicists you are though as there seems to be so many of you!

Anyways, I'll shut up now as I should be doing these Logic circuit exercises before I go to Thirst.

**Hoofbeat**)Further update: Ooo, just found out your from Keble! Quite a few of you frequent this board...I know rich does too. I'm afraid I'm not sure which of the Keble Physicists you are though as there seems to be so many of you!

Anyways, I'll shut up now as I should be doing these Logic circuit exercises before I go to Thirst.

Indeed I am from Keble, We're the ones that always finish near the end. I'm with a Chinese guy. Well, see you tomorrow then

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#8

Gah, you guys, using TSR to do your boolean algebra Some of us were hardcore and had to try and work it out ourselves the night before labs

My answers (that got ticked but may not be the simplest forms!) were:

a) ((A_+B+C)_ + (A+C_))_ _

b) ((A+B_)_ + (A_+B)_)_ _

This is about the only practical this year I've actually got any enjoyment from so I'd make the most of it if I were you!!

My answers (that got ticked but may not be the simplest forms!) were:

a) ((A_+B+C)_ + (A+C_))_ _

b) ((A+B_)_ + (A_+B)_)_ _

This is about the only practical this year I've actually got any enjoyment from so I'd make the most of it if I were you!!

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#9

Absolute genius....posting questions to lab practicals on TSR! Don't suppose any of you are functional programming enthusiasts?!?

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#10

OK, after looking at this thread, Oxford Physics looks pretty scary. Was considerig it for a bit, but...argh that sorta stuff looks mean. Though that's probably because I've never done Boolean algebra in my life....

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#11

(Original post by

OK, after looking at this thread, Oxford Physics looks pretty scary. Was considerig it for a bit, but...argh that sorta stuff looks mean. Though that's probably because I've never done Boolean algebra in my life....

**distortedgav**)OK, after looking at this thread, Oxford Physics looks pretty scary. Was considerig it for a bit, but...argh that sorta stuff looks mean. Though that's probably because I've never done Boolean algebra in my life....

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#12

Hmm, guess that doesn't make it seem quite so bad then - I guess Boolean algebra just looks scary cos I've never done it.

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#13

(Original post by

Hmm, guess that doesn't make it seem quite so bad then - I guess Boolean algebra just looks scary cos I've never done it.

**distortedgav**)Hmm, guess that doesn't make it seem quite so bad then - I guess Boolean algebra just looks scary cos I've never done it.

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#15

(Original post by

Hmm...maybe they should put it in Further Maths A-level - could be fun...

**distortedgav**)Hmm...maybe they should put it in Further Maths A-level - could be fun...

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#16

AS Electronics...ewww...I generally avoided that as far as possible when choosing my AS's, Electricity/Electronics is easily my least favourite area of Physics, though Boolean algebra looks ... interesting, so might find out a bit about it...

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#18

(Original post by

boolean algebra = karno mapping?

btw i know karno is spelt wrong

**Syncman**)boolean algebra = karno mapping?

btw i know karno is spelt wrong

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#19

(Original post by

OK, after looking at this thread, Oxford Physics looks pretty scary.

**distortedgav**)OK, after looking at this thread, Oxford Physics looks pretty scary.

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