Using my laptop as a cheap oscilloscope using Visual Analyzer 2009 tia sal2

Started by May 27, 2009
Greets All

I plan on Using my laptop as a cheap oscilloscope using Visual
Analyzer 2009 does anyone know the amount of current that the mic in
port of a laptop can handle (don't want to blow the mic in port)  I'll
only be measure in the audio range but will be coupling the ac signal
with a DC signal.  Using this circuit
http://scitoys.com/scitoys/scitoys/light/light.html

I want to see what the signal looks like that comes out of the laser
communicator.

Aloha
tia sal2
ratulloch@gmail.com wrote:
> Greets All > > I plan on Using my laptop as a cheap oscilloscope using Visual > Analyzer 2009 does anyone know the amount of current that the mic in > port of a laptop can handle (don't want to blow the mic in port) I'll > only be measure in the audio range but will be coupling the ac signal > with a DC signal. Using this circuit
http://scitoys.com/scitoys/scitoys/light/light.html
> > I want to see what the signal looks like that comes out of the laser > communicator. > > Aloha > tia sal2
600 mv pk. I would use a couple of 1n914 diodes in parallel back to front to protect the computer on the computer side of the transformer. Good day.
On Wed, 27 May 2009 21:09:49 -0400, Jamie
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net>
wrote:

>ratulloch@gmail.com wrote: >> Greets All >> >> I plan on Using my laptop as a cheap oscilloscope using Visual >> Analyzer 2009 does anyone know the amount of current that the mic in >> port of a laptop can handle (don't want to blow the mic in port) I'll >> only be measure in the audio range but will be coupling the ac signal >> with a DC signal. Using this circuit
http://scitoys.com/scitoys/scitoys/light/light.html
>> >> I want to see what the signal looks like that comes out of the laser >> communicator. >> >> Aloha >> tia sal2 >600 mv pk. I would use a couple of 1n914 diodes in parallel back to >front to protect the computer on the computer side of the transformer. >
Or use Line In, which is good for at least 3V pk-pk and usually closer to 5V. The diodes are still a good idea. Even better, use a series resistor (1K to 10K) ahead of the anti-parallel diodes. (View in monospaced font): Outside world ---- R -o--o--- Sound Card | | - V ^ - | | ---------------------------- Best regards, Bob Masta DAQARTA v4.51 Data AcQuisition And Real-Time Analysis www.daqarta.com Scope, Spectrum, Spectrogram, Sound Level Meter FREE Signal Generator Science with your sound card!