On Friday 06 October 2006 06:48 pm, lcdpublishing wrote:
How limitting do you think a scope would be if it were limitted to
35 volts?
You're not. (See below.)
There is a PC based scope - USB interfaced, that I have been
eyeballing. It isn't cheap, around $300.00, but it is dual channel
and rated up to 60 Mhz which should be fine for me.
Looking at that, the big question in my mind is the software -- are you
limited to what they supply, and if so does it have to run under windoze?
That would be a definite deal-breaker for me at least. And it looks like it
"requires" w98 at least. :-(
The real kicker that I am liking about the PC scopes is recording.
For some reason, I think that is important, not sure why, but I do ;-
)
The drawback is that voltage limit though. While most everything I
check is 5~12 volts, I have checked the output of my Stepper Driver
and that is at 41 volts.
This is the one that is being considered
Looking at the specs, the input impedance is 1M ohms and under specifications
I find "max. input voltage: 30V (AC + DC)". Now, use a 10:1 probe with
that, as one might typically do with a scope, and you have a much higher
input impedance _and_ voltage range. And it appears that the probes are
included in that price, though even if they weren't I'd think that you could
use what probes you have handy.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
