Is it possible to simulate ac signal with dc?..tia sal

[Jamie]

Greetings All

Before everyone says use an converter/inverter please read on to see if
what I'm trying to do is possible.

I have a program called cool edit pro which allows me to create different
frequency signals on the left and right audio channels using my sound card.
I was wondering if I offset/change the phase of the signals in a certain
way could I simulate an AC signal. I know the circuit programs Spice and
Multisim can due this within the compnter, but I would like to create an AC
TYPE signal using my sound card if possible...trying to keep it cheap.

Thanks Sal

Hmm, and i thought that is what the sound card does already ?

 

[Don Stauffer]

One problem with some of these discussions is that there are two
definitions of DC. One has DC as any signal always of the same polarity,
another requires DC to have the same value throughout time.

DC with a varying voltage but always the same polarity can of course be
changed to AC by running the signal through a capacitor.

Another problem I have seen whose argument reduces to the above is a
pulse width modulated signal but always of the same polarity (if you can
call zero volts a polarity- however, to overcome this problem one can
consider a PWM signal from a small fraction of a volt to many volts).

Another argument I have seen rage from the PWM situation is whether a
PWM signal is analog or digital

 

[Don Bowey]

One problem with some of these discussions is that there are two
definitions of DC. One has DC as any signal always of the same polarity,
another requires DC to have the same value throughout time.

DC with a varying voltage but always the same polarity can of course be
changed to AC by running the signal through a capacitor.

Another problem I have seen whose argument reduces to the above is a
pulse width modulated signal but always of the same polarity (if you can
call zero volts a polarity- however, to overcome this problem one can
consider a PWM signal from a small fraction of a volt to many volts).

Another argument I have seen rage from the PWM situation is whether a
PWM signal is analog or digital

Answering the practical question of a newbie with this type of
hypothetical/metaphysical nonsense is...... Well, garbage.

I wonder if these considerations of DC began with the musings of some
complete idiot, or some idiot with a phd attempting to think outside the box
(an incomplete idiot).

 

[Art]

Technically you may produce PWM signals and convert from Digital to Analog,
the frequency and output for the PWM may be selected to change with the
application of a variable DC voltage input. The Analog signal produced may
be converted to audio or other AC signals per your specific designs. Surely
there are other gifted folk in this forum that will point you to a phloera
of materials explaining exactly how to accomplish this task.

 

[Don Bowey]

No, I think that this thread is finally onto what the original poster
wanted to know. i.e. does the voltage of the centre pin of the phono
connector stay above the ground connection or does the voltage alternate
between say -1v and +1v. Both of these would generate an audio signal
but only one would be true AC, the other would be pulsed DC.

Having said that, I still don't have an answer to the original poster's
question.

You attributed the post to me, but I didn't write any part of it.

Since I don't recall the original question, I have no comments.

Don

 

[Don Bowey]

You attributed the post to me, but I didn't write any part of it.

Since I don't recall the original question, I have no comments.

Don

I went back and read the complete thread and looked through the patent file.

Here are my few comments:

The apparatus called for in the application requires both a Carrier
frequency that will vary in the range of 200 Hz. to 200 kHz., and a
Modulating frequency which will vary in the range of 20 Hz. To 200 Hz.
Obviously, an AM modulator is required, as is a Power Amplifier. Beyond
that it is all adaptive of frequencies and wave-shapes such that they can be
altered by the gas conversion process.

There is nothing in the computer's sound card that will enable the gas
conversion process.

Yes, your sound card puts out an AC signal (tones and whatever).

Don

 

[Lionel]

You attributed the post to me, but I didn't write any part of it.

Since I don't recall the original question, I have no comments.

You know nothing about electronics, motherfucker. You are an amateur.

--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[Don Bowey]

You know nothing about electronics, motherfucker. You are an amateur.

How would you know, you useless moron?

 

[Lionel]

On Thu, 31 May 2007 19:24:14 -0700, Don Bowey <[email protected]>

On 5/31/07 7:16 PM, in article
[email protected], "Lionel"
Froggery.


How would you know, you useless moron?

--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[Jason Gortician - Libertarian for President 2008]

On Thu, 31 May 2007 19:24:14 -0700, Don Bowey <[email protected]>

^^^^
Froggery.

Lionel: You're the only person in the entire universe that cares.

--
http://www.bedoper.com
Nerdcore Hip-Hop | Reptilian Watch | The Revenge of BeOS?

The Nerdcore Hip-Hop Compilation CD Project
http://www.rhymetorrents.com

 

[Lionel]

Lionel: You're the only person in the entire universe that cares.

And despite your complete lack of interest, you took the time to whine
about it anyway. Boy, you've sure showed me how much you don't care.
;^)

 

[Art Deco]

And despite your complete lack of interest, you took the time to whine
about it anyway. Boy, you've sure showed me how much you don't care.
;^)

Jasnuh was a lot more entertaining when he used to rant about the HUGE
POOLS OF MOLTEN STEEL.

--
Supreme Leader of the Brainwashed Followers of Art Deco

"Causation of gravity is missing frame field always attempting
renormalization back to base memory of equalized uniform momentum."
-- nightbat the saucerhead-in-chief

"Of doing Venus in person would obviously incorporate a composite
rigid airship, along with it's internal cache of frozen pizza and
ice cold beer."
-- Brad Guth, bigoted racist

"You really are one of the litsiest people I know, Mr. Deco."
--Kali, quoted endlessly by David Tholen as evidence of "something"

 

[Lionel]

And despite your complete lack of interest, you took the time to whine
about it anyway. Boy, you've sure showed me how much you don't care.
;^)

Jasnuh was a lot more entertaining when he used to rant about the HUGE
POOLS OF MOLTEN STEEL.[/QUOTE]

Sometimes I miss those days, but then I remember how Jasie was joined
at the hip to Dean "Watching Paint Dry" Humphries.


--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[Art Deco]

Jasnuh was a lot more entertaining when he used to rant about the HUGE
POOLS OF MOLTEN STEEL.

Sometimes I miss those days, but then I remember how Jasie was joined
at the hip to Dean "Watching Paint Dry" Humphries.[/QUOTE]

Every time I saw that Dumphries sig, I knew it was time for new KF
entry.

[++alt.snuh]

--
Supreme Leader of the Brainwashed Followers of Art Deco

"Causation of gravity is missing frame field always attempting
renormalization back to base memory of equalized uniform momentum."
-- nightbat the saucerhead-in-chief

"Of doing Venus in person would obviously incorporate a composite
rigid airship, along with it's internal cache of frozen pizza and
ice cold beer."
-- Brad Guth, bigoted racist

"You really are one of the litsiest people I know, Mr. Deco."
--Kali, quoted endlessly by David Tholen as evidence of "something"

 

[Lionel]

On Fri, 01 Jun 2007 09:56:12 -0600, Art Deco <[email protected]>


Sometimes I miss those days, but then I remember how Jasie was joined
at the hip to Dean "Watching Paint Dry" Humphries.

Every time I saw that Dumphries sig, I knew it was time for new KF
entry.

[++alt.snuh][/QUOTE]

Thanks Art, I completely forgot to piss in the snuh-treehouse.

--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[Jason Gortician - Libertarian for President 2008]

And despite your complete lack of interest, you took the time to whine
about it anyway.

You don't know what words mean, do you?

Boy, you've sure showed me how much you don't care.
;^)

Yes, I care so much about froggeries of you that I really read the header
info to make sure you're you.

Right?

--
http://www.bedoper.com
Nerdcore Hip-Hop | Reptilian Watch | The Revenge of BeOS?

The Nerdcore Hip-Hop Compilation CD Project
http://www.rhymetorrents.com

 

[Jason Gortician - Libertarian for President 2008]

Jasnuh was a lot more entertaining when he used to rant about the HUGE
POOLS OF MOLTEN STEEL.

Which I never did, of course.

And, ever since you've said that, you've run away from any discussions
related to that.

Why do you run from me so much?


--
http://www.bedoper.com
Nerdcore Hip-Hop | Reptilian Watch | The Revenge of BeOS?

The Nerdcore Hip-Hop Compilation CD Project
http://www.rhymetorrents.com

 

[Jason Gortician - Libertarian for President 2008]

Jasnuh was a lot more entertaining when he used to rant about the HUGE
POOLS OF MOLTEN STEEL.

Sometimes I miss those days, but then I remember how Jasie was joined
at the hip to Dean "Watching Paint Dry" Humphries.[/QUOTE]

Please get off of my dick, supplicant.

--
http://www.bedoper.com
Nerdcore Hip-Hop | Reptilian Watch | The Revenge of BeOS?

The Nerdcore Hip-Hop Compilation CD Project
http://www.rhymetorrents.com

 

[John \C\]

Which I never did, of course.

And, ever since you've said that, you've run away from any discussions
related to that.

Why do you run from me so much?

Art Deco runs away from me, also. You think he's just afraid of everyone?

HJ

 

[Jason Gortician - Libertarian for President 2008]

Art Deco runs away from me, also. You think he's just afraid of
everyone?

Perhaps running runs in his family.

--
http://www.bedoper.com
Nerdcore Hip-Hop | Reptilian Watch | The Revenge of BeOS?

The Nerdcore Hip-Hop Compilation CD Project
http://www.rhymetorrents.com