[sdiy] Nano ARM Handheld Mini DSO201 Pocket Digital Scope Storage Portable Oscilloscope

[Rob]

Check out this oscope if you want one already built.
Nano ARM Handheld Mini DSO201 Pocket Digital Scope Storage Portable 
Oscilloscope

It is smaller than my IPHONE.
I didn't want a kit..... and I wanted to measure audio filter circuits, 
nothing RF, so I didn't need anything
out there in MHz land.
I was extremely pleased with this oscope.