Date: Mon, 28 Feb 2011 10:28:31

Author: Brian Huang

Subject: Re: PC Use as Oscilloscope

Post:

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For $140, the USB Oscilloscope by Parallax is by far the best deal out
there. It produces clean traces and their software works just like a
regular scope.

I bought one for troubleshooting digital circuits in our robotics program,
and it's great for seeing PWM signals produced by our microcontrollers.

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/oscilloscope/List/0/SortField/4/ProductID/46/Default.aspx

-Brian
Overland HS
Aurora, CO

On Mon, Feb 28, 2011 at 8:00 AM, wmcnairy wrote:

> Hi Tappers!
>
> I've heard some threads discussing use of a laptop to drive a speaker with
> different waveforms.
>
> I'd like for students to be able to take data using the sound input and
> analyze it on an oscilloscope type input. We have Logger Pro, so perhaps it
> could do FFT of the data, but an oscilloscope would give 'real time' image
> of input.
>
> I believe, however, that the microphone input on PC's has a very limited
> voltage range, and can go 20-20,000 Hz. Any ideas for a simple, cheap make
> or purchase interface that would work between a circuit and the computer?
> We're talking about teachers and students, so I'd prefer something that
> clips the signal below the maximum voltage input-- I'd hate to have to
> replace the motherboard in some kid's computer because we fried the sound
> card part of it.
>
> Thanks for any ideas on either the software or the hardware to make this
> happen!
>
> bill
>
>

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For $140, the USB Oscilloscope by Parallax is by far the best deal out ther=
e.=A0 It produces clean traces and their software works just like a regular=
scope.I bought one for troubleshooting digital circuits in our rob=
otics program, and it's great for seeing PWM signals produced by our mi=
crocontrollers.

http://www.pa=
rallax.com/StoreSearchResults/tabid/768/txtSearch/oscilloscope/List/0/SortF=
ield/4/ProductID/46/Default.aspx

-BrianOverland HSAurora, COO=
n Mon, Feb 28, 2011 at 8:00 AM, wmcnairy wrote:<=
br>


Hi Tappers!
I've heard some threads discussing use of a laptop to drive a speak=
er with different waveforms.I'd like for students to be able to=
take data using the sound input and analyze it on an oscilloscope type inp=
ut.=A0 We have Logger Pro, so perhaps it could do FFT of the data, but an o=
scilloscope would give 'real time' image of input.

I believe, however, that the microphone input on PC's has a very li=
mited voltage range, and can go 20-20,000 Hz.=A0 Any ideas for a simple, ch=
eap make or purchase interface that would work between a circuit and the co=
mputer?=A0 We're talking about teachers and students, so I'd prefer=
something that clips the signal below the maximum voltage input-- I'd =
hate to have to replace the motherboard in some kid's computer because =
we
fried the sound card part of it.Thanks for any ideas on either the=
software or the hardware to make this happen!bill<=
/div>

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From tap-l-owner@lists.ncsu.edu Mon Feb 28 13:30:58 2011
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