On 14/11/2010 22:54, William "Chops" Westfield wrote:
> On Nov 14, 2010, at 2:10 PM, Michael Watterson wrote:
>
>>   http://www.fpga4fun.com/Hands-on_Flashy.html
>>
>> What do the canny folk here think?
> It depends on what you want it for.
>
> I think there's a big difference between the analog front end up a
> good oscilloscope and the input buffer of a typical "data acquisition
> board."
>
> I think there's a big difference between a calibrated and trustworthy
> test instrument and a "demo program" that displays acquired analog
> data (check out the funky "time per division" values, for example!)
>
> A dual trace scope is much more useful than a single trace scope.
>
> I'm not wild about requiring my PC to be part of an instrument...
>
> That said, there's an awful lot of useful things to do with a scope
> that don't involve precision, or extended input voltages, or anything
> beyond "yeah, that looks about like what ought to be there."
>
> BillW
>
Add a PIC and 320x240 touch screen (KS108 64x128 mono easier) and the=20
price goes up and it's still a toy, but more portable.
USB is a pain on FPGA. price of a USB socket on an 18F PIC, So you get=20
USB PC interface and portable screen

It's an interesting FPGA demo.. but not really a scope The A/D on a PIC=20
on it's own is maybe 50KHz?

--=20
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