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PICList Thread
'DSO and Soundcard'
1998\09\11@192939 by Peter

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Some one had mentioned that there is a shareware program that allows you to
use your soundcard as a Digital Oscilloscope???

Has anyone herd of this and where can I get a copy?...perhaps I was
dreaming.
;)

TIA
--------------------------------
Pete
spam_OUTpopowiczTakeThisOuTspamoanet.com

1998\09\11@194034 by Herbert Graf

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> Some one had mentioned that there is a shareware program that
> allows you to
> use your soundcard as a Digital Oscilloscope???
>
> Has anyone herd of this and where can I get a copy?...perhaps I was
> dreaming.
> ;)

       I have a program that does that, don't know if it is sharware or freewar
e.
I can send it to you if you want. TTYL

1998\09\11@195615 by andre

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Peter wrote:

> Some one had mentioned that there is a shareware program that allows you to
> use your soundcard as a Digital Oscilloscope???

what that means if you have a digital signal thatis in audio range   you can
record the signal in  *. wav  format then
increase the gain to the maximum then you will see squerwave signals.
I tried that it works ok. my signal was 12k.
this technique is good for capturing remote control signals.


Andre Abelian


> Has anyone herd of this and where can I get a copy?...perhaps I was
> dreaming.
> ;)

1998\09\11@203332 by Peter

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>        I have a program that does that, don't know if it is sharware or
freeware.
>I can send it to you if you want. TTYL
>

That would be great :) I am trying to get the timing on my I2C program
correct. I have a program that reads any device on a I2C buss using NT4 and
a parallel port.

If you could; please email it to me

TIA

--------------------------------
Peter
.....popowiczKILLspamspam@spam@oanet.com

1998\09\11@221345 by Martin Darwin
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At 06:33 PM 9/11/98 -0700, you wrote:

>That would be great :) I am trying to get the timing on my I2C program
>correct. I have a program that reads any device on a I2C buss using NT4 and
>a parallel port.

You probably can't capture full speed I2C signals with your soundcard.
Typical sound cards max out at 44.1KHz. And if you listen to our old friend
Nyquist, that makes 22Khz the max. signal you can sample.  Last time i
checked I2C was 100Kbits/sec. Now if you are running the I2C bus at < 20KHz
nevermind =)

MD

--
Martin Darwin    a.k.a Rambo  -- Play QUAKE!!
martinspamKILLspamdavin.ottawa.on.ca       -  4th year Computer Engineering
http://www.davin.ottawa.on.ca/~martin  University of Ottawa

1998\09\12@075418 by Russell McMahon

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Electronics Australia magazine recently (August 1998 issue?) had an
article which gave web addresses for software and had a construction
article on a front end. I've copied this reply to Paul Webster in the
hope that he has a copy of the magazine and/or can cite the web site.
You could try a web search.

The EA article and software allows a full analog oscilloscope limited
by the cards sampling rate.
The circuit used, as I recall,  a simple LM324 audio amplifier to
amplify the  level and allow amplitude variation (volume control).




PS - just did a Metacrawler search and found this -
NOTES:
www.bobsplace.com/~twitham/oscope/oscope-1.4/README
CODE
http://www.bobsplace.com/~twitham/oscope/oscope-1.4/

and this

http://www.yggdrasil.com/bible/LSM/lsm413.html

and

cnuce-arch.cnr.it/Linux/apps/circuits/oscope.lsm
{Original Message removed}

1998\09\12@092259 by paulb

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Russell McMahon wrote:

> I've copied this reply to Paul Webster in the hope that he has a copy
> of the magazine and/or can cite the web site.

 I can do the latter, http://www.electronicsaustralia.com.au/ but it
won't help you very much as they only detail the *current* issue.  They
excuse it as being a recent venture, "under construction".

 I'll have to wait till I see my dad next, probably tomorrow, as he
buys and reads the magazine first, passing it on to me between a week
and three months later!

 I used to be real enthusiastic about it, and they have I think even
had a PIC project (16C84 programmer), or was that "Silicon Chip"?  I'm
getting a bit fazed in my old (middle) age though.
--
 Cheers,
       Paul B.

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