Re: [CAD_CAM_EDM_DRO] Re: Oscilloscopes

----- Original Message -----
From: Gary <m1911bldr@...>

> I would be very interested in the site addresses fo rthis
> shareware. I have a couple of "excess" computers I would be willing
> to risk smoking in the name of experimentation if I can get the
> shareware.

You could start at :-
http://polly.phys.msu.su/~zeld/oscill.html
http://www.winsite.com/info/pc/win3/sounds/scoper.zip/
http://www.leonardo.caltech.edu/~ee5x/eecs52/projects/scope/
http://www.panmanee.com/scope1.htm

There are others which a search of the net would find. There are also quite
a few kits on the market for 'black boxes' to plug in the parallel port to
convert the PC into a digital storage 'scope. The problem as I see it is
that, if you are using a sound card for input, there will be a voltage
limitation - probably around 10 volts max. - which would be too low for our
use in checking stepper driver outputs - OK for the TTL stuff but not for
the power side. The commercial kits for the parallel port on the other hand,
seem to accept voltages up to 100 volts. I wonder if it just needs a
transformer or something to step the voltage down to a 'safe' level for the
sound card?

Ian
--
Ian W. Wright
Sheffield UK