AVR-Chat

Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-)

A long time ago (never mind how long ago <g>) when I was getting my EE
(Computer Design minor) at SUNY Buffalo I remember a class where we were
studying combinational logic, gate reduction, etc. using, if I recall
correctly, "Mealy, Moore, and xx" where, as I recall, "xx" was something
that sounded like "Majediv".  I have Googled several attempts at its
spelling but I am unable to turn up anything.

Anybody know what I'm thinking of?

Nothing critical to life at the moment, just one of those "I wonder if that
would be useful to me now" kinds of musings.

I never did actual "Computer Design" as such (mostly software system
design), but, as my father (EE and college professor for 30 years in NY
state) used to tell me:

	"Engineering doesn't GIVE you all the answers but it 
	teaches you how to FIND the answers"

Which, by enlarge, has proven true for me ...

The only thing I remember about is Quine-McClusky reduction algorithm  
and Karnaugh Mapping. Don't ask me how to use them!

Jim Wagner
Oregon Research Electronics

On Jun 19, 2010, at 2:43 PM, Chuck Hackett wrote:

> Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-)
>
> A long time ago (never mind how long ago <g>) when I was getting my EE
> (Computer Design minor) at SUNY Buffalo I remember a class where we  
> were
> studying combinational logic, gate reduction, etc. using, if I recall
> correctly, "Mealy, Moore, and xx" where, as I recall, "xx" was  
> something
> that sounded like "Majediv". I have Googled several attempts at its
> spelling but I am unable to turn up anything.
>
> Anybody know what I'm thinking of?
>
> Nothing critical to life at the moment, just one of those "I wonder  
> if that
> would be useful to me now" kinds of musings.
>
> I never did actual "Computer Design" as such (mostly software system
> design), but, as my father (EE and college professor for 30 years in  
> NY
> state) used to tell me:
>
> "Engineering doesn't GIVE you all the answers but it
> teaches you how to FIND the answers"
>
> Which, by enlarge, has proven true for me ...
>
>
> 



[Non-text portions of this message have been removed]

Those names don't sound familiar. Do you recall what they were pertaining
to?

Zack

On Sat, Jun 19, 2010 at 4:43 PM, Chuck Hackett <egroupscdh@up844.us> wrote:

>
>
> Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-)
>
> A long time ago (never mind how long ago <g>) when I was getting my EE
> (Computer Design minor) at SUNY Buffalo I remember a class where we were
> studying combinational logic, gate reduction, etc. using, if I recall
> correctly, "Mealy, Moore, and xx" where, as I recall, "xx" was something
> that sounded like "Majediv". I have Googled several attempts at its
> spelling but I am unable to turn up anything.
>
> Anybody know what I'm thinking of?
>
> Nothing critical to life at the moment, just one of those "I wonder if that
> would be useful to me now" kinds of musings.
>
> I never did actual "Computer Design" as such (mostly software system
> design), but, as my father (EE and college professor for 30 years in NY
> state) used to tell me:
>
> "Engineering doesn't GIVE you all the answers but it
> teaches you how to FIND the answers"
>
> Which, by enlarge, has proven true for me ...
>
> 
>


[Non-text portions of this message have been removed]

They are tools for simplifying combinational logic.  You started out with a 
set of equations describing what you wanted to build.  And the tools helped 
you to turn the simultaneous equations into a solution.  I think matrix 
tools were part of that but we are going WAY WAY back into the day...

73/jeff/ac0c
www.ac0c.com


--------------------------------------------------

From: "Zack Widup" <w9sz.zack@gmail.com>
Sent: Saturday, June 19, 2010 5:16 PM
To: <AVR-Chat@yahoogroups.com>
Subject: Re: [AVR-Chat] Mealy, Moore and ???

> Those names don't sound familiar. Do you recall what they were pertaining
> to?
>
> Zack
>
> On Sat, Jun 19, 2010 at 4:43 PM, Chuck Hackett <egroupscdh@up844.us> 
> wrote:
>
>>
>>
>> Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-)
>>
>> A long time ago (never mind how long ago <g>) when I was getting my EE
>> (Computer Design minor) at SUNY Buffalo I remember a class where we were
>> studying combinational logic, gate reduction, etc. using, if I recall
>> correctly, "Mealy, Moore, and xx" where, as I recall, "xx" was something
>> that sounded like "Majediv". I have Googled several attempts at its
>> spelling but I am unable to turn up anything.
>>
>> Anybody know what I'm thinking of?
>>
>> Nothing critical to life at the moment, just one of those "I wonder if 
>> that
>> would be useful to me now" kinds of musings.
>>
>> I never did actual "Computer Design" as such (mostly software system
>> design), but, as my father (EE and college professor for 30 years in NY
>> state) used to tell me:
>>
>> "Engineering doesn't GIVE you all the answers but it
>> teaches you how to FIND the answers"
>>
>> Which, by enlarge, has proven true for me ...
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" <egroupscdh@...> wrote:
>
> ... when I was getting my EE ...
> ... I remember a class where we were
> studying combinational logic, gate
> reduction, etc. using, if I recall
> correctly, "Mealy, Moore, and xx"
> where, as I recall, "xx" was something
> that sounded like "Majediv".  I have
> Googled several attempts at its spelling
> but I am unable to turn up anything.
> 
> Anybody know what I'm thinking of?

I don't really have any information you won't readily find on Wikipedia, except my recollection of this topic from equally long ago is that there is Mealy, Moore and Mixed.  I don't recall anything else.  Perhaps someone decided to name the Mixed model after himself but it didn't stick?

For those not interested enough to look this stuff up, I should point out that these are not topics in combinational logic (that's Quine–McCluskey, Karnaugh maps, etc.) but topics in sequential logic design.

Graham.

Was it karnaugh mapping, this was a visual way of reducing the
states/transitions of Mealy and Moore state machines, one is a function of
it's outputs, the other is a function of the inputs and outputs i think !!
lol
 

  _____  

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Chuck Hackett
Sent: 19 June 2010 22:43
To: AVR-Chat
Subject: [AVR-Chat] Mealy, Moore and ???


  

Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-)

A long time ago (never mind how long ago <g>) when I was getting my EE
(Computer Design minor) at SUNY Buffalo I remember a class where we were
studying combinational logic, gate reduction, etc. using, if I recall
correctly, "Mealy, Moore, and xx" where, as I recall, "xx" was something
that sounded like "Majediv". I have Googled several attempts at its
spelling but I am unable to turn up anything.

Anybody know what I'm thinking of?

Nothing critical to life at the moment, just one of those "I wonder if that
would be useful to me now" kinds of musings.

I never did actual "Computer Design" as such (mostly software system
design), but, as my father (EE and college professor for 30 years in NY
state) used to tell me:

"Engineering doesn't GIVE you all the answers but it 
teaches you how to FIND the answers"

Which, by enlarge, has proven true for me ...






[Non-text portions of this message have been removed]

>  ... "Mealy, Moore, and xx" where, as I recall, "xx" was ...

Maybe

xx == Mary  : http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.30.4168&rep=rep1&type=pdf

xx == Harel : http://www.iar.com/website1/1.0.1.0/372/1/

or maybe not.

Daniel

--- In AVR-Chat@yahoogroups.com, wagnerj@... wrote:
>
> > I'm going to create check system to look my garden by my webcam so hat I
> > can connect to Internet by my cell and monitoring what happens.
> > Are you able to suggest me a similar project with atmega8535 ?
> >
> 
> What do you expect your 8535 to do?

I would like to know if he realizes how many he will need !!

H

> 
> Jim Wagner
> Oregon Research Electronics
>

I'm going to create check system to look my garden by my webcam so hat I can connect to Internet by my cell and monitoring what happens.
Are you able to suggest me a similar project with atmega8535 ?

[Non-text portions of this message have been removed]

> I'm going to create check system to look my garden by my webcam so hat I
> can connect to Internet by my cell and monitoring what happens.
> Are you able to suggest me a similar project with atmega8535 ?
>

What do you expect your 8535 to do?

Jim Wagner
Oregon Research Electronics

--- In AVR-Chat@yahoogroups.com, "Riccardo Castellani" <ric.castellani@...> wrote:
>
> I'm going to create check system to look my garden by my webcam so hat I can connect to Internet by my cell and monitoring what happens.
> Are you able to suggest me a similar project with atmega8535 ?
> 

A good site to start with:
http://www.jrobot.net/Projects/AVRcam.html