Parallax USB scope

[Normnet]

USB 3.0 could change the speed of USB scopes.
600 Meg bytes per sec for 3.0 vs 60 Meg bytes for 2.0

It would be interesting to see just how fast a PIC could read and send data
to a PC.

Norm

[dhouston]

In this case, the bus speed is not the limiting factor. You can get much better performance from other USB oscilloscopes but it comes at a higher price. For example

• http://www.bitscope.net/store/?p=list&a=list&i=cat+0

[Normnet]

In simplest terms sample, send to PC, and plot on graph.
I bet a FPGA or fast DSP could handle the sample and send part.

Norm

[falingtrea]

Here is a pretty decent USB scope. Sample rate max is 2 giga sample(repetitive)/200 Mega sample (single shot) with a 60 MHz bandwidth. Also has a 8 bit logic analyzer, and pattern generator, and software FFT capability as well. Only $250.

[Ioannis]

Nice site, but do not get carried away by the Sampling numbers. The actual frequency limit is equally impressive low!

Ioannis

[Normnet]

Ill quote Mike Payson from electronics 101:

One interesting Scope alternative that I've been considering picking
up is the FlashyD from FPGA4Fun.

For about $220, you get what amounts to a two channel 220MHz Color
Digital storage OScope (FlashyD Rev K + Saxo). Not bad really. If
you're willing to sacrifice a channel and some speed (60MHz), you can
get the price down to about $72 (Flashy Rev H + Pluto). Several other
configurations are available between (and above) those price points.

The various options are confusing, but it's all explained if you dig
deep enough on that site (The datasheet is very helpful).

Norm