On 23 September 2014 17:28, Joshua Shriver <jshriver@gmail.com> wrote:
>
Anyone offering a deal for a college newbie?  Recommend a place
> outside ebay to get (even) and old school oscilloscope?

What bandwidth do you need (or want)?

You can use a PC audio card for a rather low bandwidth version.

I do not know what spec Arduino based ones off, but I recently saw a cheap
($15) DIY version using a DS PIC.
With the limitation that it is USB output and needs a "PC" or similar to
control and view its output
It's essentially a DSPIC, a matchbox (optional) and not too much else. 1
Ms/s x  2 channel or 20 Ms/s sampled.


Right end of top row (so far here if you want an accompanying technical
links black hole as well

                     http://www.pinterest.com/russellmcmahon/tech/

Or Instructables here
http://www.instructables.com/id/DIY-USB-OSCILLOSCOPE-IN-A-MATCHBOX/


Full circuit diagram here:
http://cdn.instructables.com/FPT/SS69/HMEXX2QJ/FPTSS69HMEXX2QJ.MEDIUM.jpg


    Russell



Also possibly useful - he says:

I present a "BEST OF CLASS", "Full-Featured"  DIY-USB OSCILLOSCOPE which is
 "Truly DIY".

My aim is to provide a cheap  Digital-Storage-Oscilloscope for Students,
Budding Engineers and the Hobbyist.

This USB-Oscilloscope could be part of the laboratory equipment in
educational establishments.

*Build this DIY-Oscilloscope for just $15*

I wish to acknowledge the inputs from the following designs which have led
to this optimized solution:

DPScope SE - the simplest real oscilloscope/logic analyzer on the
planet, by womai,
http://www.instructables.com/id/DPScope-SE-the-simplest-real-oscilloscopelo=
gic-/

DPScope - Build Your Own USB/PC-Based Oscilloscope,by womai
http://www.instructables.com/id/DPScope-Build-Your-Own-USBPC-Based-Oscillos=
cope/

LCS-1M - A Full-Featured, Low-Cost Hobby Oscilloscope,by womai
http://www.instructables.com/id/LCS-1M-A-Full-Featured-Low-Cost-Hobby-Oscil=
losc/

PC SOUND-CARD SCOPE INTERFACE FACILITATES DC RESTORATION, by me
http://www.instructables.com/id/PC-SOUND-CARD-SCOPE-INTERFACE-FACILITATES-D=
C-RESTO/

Universal Analog Hardware Testbench, by me
http://www.instructables.com/id/Universal-Analog-Hardware-Testbench/

Analog Experiments Anywhere,by me
http://www.instructables.com/id/Analog-Experiments-Anywhere/

Two-Channel PC Based Oscilloscope USB, by Gaurav Chaudhary
http://www.circuitvalley.com/2011/07/two-channel-pcbased-oscilloscope-usb.h=
tml

Responding to comments and suggestions from many members :

I am sharing the micro-controller fuse *.Hex *file for the dsPIC30F2020.

The Host PC software has been written in both 'Visual Basic.Net' and open
source 'Python' providing a *cross-platform* GUI based solution for both
 Windows and Linux platforms.
--=20
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