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PICList Thread
'PIC Digital Storage Scope'
1998\06\30@180306 by Sean Breheny

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Hello fellow piclisters:

A while back I posted several messages about trying to build a PIC-Based
digital storage oscilloscope. Well, I'm not finished, but I have made
some progress. A short description, some pictures, and a block diagram of
the current status of the project can be found at:

http://www.people.cornell.edu/pages/shb7/posc.html

I will post again to the list when I have the project advanced enough to
publish a schematic for others to try building similar devices.

Sean


'PIC Digital Storage Scope'
1998\07\01@103357 by WIL REEDER
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There is a pic based osc. available from Old Colony Radio Sales ( a
Velleman kit) for 199.USD it will store a
waveform for download to PC. Bandwidth is a measly >1m but lots of features
true rms etc. & it is portable.
I am really happy with mine---but it is limited. Good on you for your work;
I'm sure yours will be great!! Old
Colony is on the www try a search.
wil reeder
vancouver; canada

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1998\07\01@112205 by Scott Newell

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>There is a pic based osc. available from Old Colony Radio Sales ( a
>Velleman kit) for 199.USD it will store a
>waveform for download to PC. Bandwidth is a measly >1m but lots of features
>true rms etc. & it is portable.

I looked at:
http://www.audioxpress.com/bksprods/index.htm

and didn't see any Velleman scope kits.  But for $200, I think
I'd go with a used Tek analog scope!

To me, 1 MHz with 6 bits of vertical resolution is just way too
limiting to be of any use, even for audio.


newell

1998\07\01@201333 by Sean Breheny

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On Tue, 30 Jun 1998, WIL REEDER wrote:

> There is a pic based osc. available from Old Colony Radio Sales ( a
> Velleman kit) for 199.USD it will store a
> waveform for download to PC. Bandwidth is a measly >1m but lots of features
> true rms etc. & it is portable.
> I am really happy with mine---but it is limited. Good on you for your work;
> I'm sure yours will be great!! Old
> Colony is on the www try a search.
> wil reeder
> vancouver; canada
>

Hi Wil,

I looked around on the web at several other cheap DSOs before starting my
project. Most were pretty bandwidth limited,as you point out. My
prototype is designed to handle 8bits at 40MS/s with an input BW of
100MHz min. (of course, this violates Nyquist, but eventually I may use
repetitive resampling techniques and I want to be able to handle higher BW).
i also hope to move to 12bits later on.

Sean

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