voltage divider calcs
in [Design]
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From: Joel Koltner on 24 Apr 2010 20:28 "-jg" <jim.granville(a)gmail.com> wrote in message news:804078af-510e-4fcb-9cc2-5007cc7c8e70(a)s15g2000prg.googlegroups.com... >If you do not NEED the advanced silicon, why choose it ? Because manufacturers have a tendency to start cranking up the price of the older lines within a couple of years of coming out with the new lines? Some manufacturers are far better than others in this respect, though. Spartan isn't the bleeding edge line anyway -- Virtex is. We were buying some old Actel FPGAs for >$50 for awhile since we kept thinking -- "oh, it's just one more order so we'll only need 10 more FPGAs, $500 wouldn't pay for the engineering time to switch to a newer/different park" ...several times over :-(, even though the newer replacement parts would have been <$5.
From: Michael A. Terrell on 24 Apr 2010 21:41 John Larkin wrote: > > Michael A. Terrell wrote: > > > > My last new computer had windows ME, ten years ago. > > We run XP on HP ProLiant "server" boxes, all identical (we've bought > 15 or so) with hot-plug RAID drives. That setup is about as solid as > anything Microsoft-related gets. I'll wait a few years before > considering Windows 7... try it on a throw-away laptop first maybe. > > An OS should be like a hammer. Boring. Undramatic. Simple. Reliable. That cheap eMachines 733MHz computer lasted longer than any other off the shelf computer I've owned. I got a bunch of the Dells like you replaced with your current HPs. They die like fruitflies. :( The longest I've been able to keep one working was about six months. :( The drives, power supplies & motherboards are dying like dimbulb''s chances of being civil. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida http://www.flickr.com/photos/materrell/
From: Nial Stewart on 26 Apr 2010 05:40 >>I dunno about 'crappy I/O', > I do. That's the point. Details? I haven't had, or heard of any problems with Altera devices (at least wrt adhering to the the data sheets). Nial
From: Rene Tschaggelar on 26 Apr 2010 06:57 John Larkin wrote: > It's easier to use LT Spice to do a simple resistor string voltage > divider analysis than to use a calculator! Much easier if you want to > futz with values to hit some targets. > > Copying the results from the DC analysis window requires highlighting > and ctrl/c to get the text into the clipboard. There's no obvious > "print" or "copy" or "save" things. > > Interesting that Scad3.exe is only 5.4 megabytes. > > > John > > I once wrote such an application. It took just 247k. Download here http://www.ibrtses.com/products/teiler22.zip Rene
From: John Larkin on 26 Apr 2010 11:11
On Mon, 26 Apr 2010 12:57:20 +0200, Rene Tschaggelar <none(a)none.net> wrote: >John Larkin wrote: >> It's easier to use LT Spice to do a simple resistor string voltage >> divider analysis than to use a calculator! Much easier if you want to >> futz with values to hit some targets. >> >> Copying the results from the DC analysis window requires highlighting >> and ctrl/c to get the text into the clipboard. There's no obvious >> "print" or "copy" or "save" things. >> >> Interesting that Scad3.exe is only 5.4 megabytes. >> >> >> John >> >> > >I once wrote such an application. It took just 247k. >Download here http://www.ibrtses.com/products/teiler22.zip Sorry, I'm not going to run an exe file when there's no 'readme' or anything else to hint at what it does. > >Rene Software can be good and tight and reliable if it doesn't a lot of bloated Windows stuff. Our parts data/inventory/parts list program compiles to 414K and runs blindingly fast. ftp://jjlarkin.lmi.net/MAX.jpg It's a "console" application that runs under Windows, sort of like a Dos box. One can knock out useful engineering apps in minutes if you don't have to do the Windows nonsense. John |