RoundUp on The Ultimate Math Program for Electronics

[D from BC]

Saw a nice collection of electronics calculators with links from
Homer J and David L.
Almost makes me want to start coding in C again to create my own
custom electronics apps.


Math software vs. Paper

Phil says grinding through algebra generates intuition.
Maybe I'm at some other level...
I think I've killed at least 1 tree with routine calculations.
Doing paper math did force me to find math shortcuts on
occasion. I had a matrix problem where I just wanted answers not
art.

In reply to Dr. Anton words of wisedom.. ..
Speed is Good!! (movie reference) I made many slow mistakes
on paper and now I can make many fast mistakes on the PC!
My time goes into problem definition and problem
solution...Ideally I can hammer on the problem definition and
let the software do the solution in a blink. Possible 50% mental
savings

NSolve[In(g)==Out(g)] <<Solve for Garbage in to Garbage out


Math Plug Ins
I'll be looking..
Thanks Slebetman


Matlab
This sounds like the big gun. I'll check it out. Cool that spice
is importable.
Thanks Alex


Posting Test

I'll try to include a BBQ recipe on my next posting test.

 

[Joel Kolstad]

Almost makes me want to start coding in C again to create my own
custom electronics apps.

Unless your time is free, you'd be much better off starting with something
like SciLab and Octave, since they already know about complex numbers,
graphing, far fancier functions than you'll likely ever use, etc.

 

[Joerg]

Unless your time is free, you'd be much better off starting with something
like SciLab and Octave, since they already know about complex numbers,
graphing, far fancier functions than you'll likely ever use, etc.

Nah, this is how real engineers do it:

http://www.sphere.bc.ca/test/sliderules/45fc-8-10-circular.jpg

 

[Fred Bartoli]

Joerg a écrit :

Nah, this is how real engineers do it:

http://www.sphere.bc.ca/test/sliderules/45fc-8-10-circular.jpg

Nope; this is how the real ones do it:

http://www.sphere.bc.ca/test/diy/dcp_2544.jpg

 

[Jim Thompson]

Nah, this is how real engineers do it:

http://www.sphere.bc.ca/test/sliderules/45fc-8-10-circular.jpg

I have a similar one by Post, with Trig tables on the back... bought
around 1958-59.

...Jim Thompson

 

[kell]

Nah, this is how real engineers do it:

http://www.sphere.bc.ca/test/sliderules/45fc-8-10-circular.jpg

Go digital:

http://webhome.idirect.com/~totton/abacus/Photos/1.htm

 

[Joerg]

I have a similar one by Post, with Trig tables on the back... bought
around 1958-59.

The only round one I have is a pregnancy calculator for medical
ultrasound

Then a few elaborate rectangular slide rules where one of them is in
regular use. Aristo Scholar VS, the one for engineers. My trusty old RF
slide rule for filter calcs disintegrated, didn't like the move across
the ocean :-(((

It's amazing how easily the salty air gets into freight containers in
winter and how it can damage things. So, if anyone has to move across
the pond don't do it in January like we did. At least not if the ship
takes a northern route.

 

[Joerg]

Joerg a écrit :


Nope; this is how the real ones do it:

http://www.sphere.bc.ca/test/diy/dcp_2544.jpg

Ah, a timber based version. Nice.

Engineers in the times of the Romans would disagree though. They'd say
that this is how it's done right:

http://en.wikipedia.org/wiki/Image:Abacus_01.gif

 

[joseph2k]

Ah, a timber based version. Nice.

Engineers in the times of the Romans would disagree though. They'd say
that this is how it's done right:

http://en.wikipedia.org/wiki/Image:Abacus_01.gif

Except that is not an abacus, it is a soroban.

 

[Robert]

Except that is not an abacus, it is a soroban.

As in " Succoring a Soroban "

http://home.gwi.net/~jdebell/pe/cj/cnjindex.htm

Robert

 

[jasen]

Except that is not an abacus, it is a soroban.

No, it has two beads in the top row and five in the bottom row,
a soroban has one on top and four below. it looks lika a chinese
abacus to mee. it look very similar to the one my grandmother picked up in
hong-kong (or perhaps singapore) except hers was probably tourist junk.

Anyway a soroban is an abacus.

Bye.
Jasen

 

[joseph2k]

No, it has two beads in the top row and five in the bottom row,
a soroban has one on top and four below. it looks lika a chinese
abacus to mee. it look very similar to the one my grandmother picked up
in hong-kong (or perhaps singapore) except hers was probably tourist junk.

Anyway a soroban is an abacus.

Bye.
Jasen

Yes and no, the fundamental concept is the same; an classic original Greek
abacus is strictly decimal and the soroban is biquinary. Wikipedia shows
that it was independently created in many cultures.