Strange idea..

...

Yes, I have it set to 250 to suit another place (lkml) ;) Even though Linux CodingStyle specifies max 80 char lines, if somebody exceeds it, one cannot rewrap that line, as the meaning of the code would change.

I'm quite happy putting in manual newlines, been doing that writing code for so many years, it is second nature ;)

Occasionally I'll break the convention on Usenet when reporting or responding to stuff that exceeds 80 cols and looks totally messed up if line-wrapped.

Current nature of usenet is pretty messed up anyway, probably because self-moderation doesn't exist for lot's of people?

Grant.

Reply to
Grant
Loading thread data ...

I'm an 80 character kind-a-guy ;-) So I set my wrap at 70 to leave room for multiple re-quotes before weird wraps screw up the content.

...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
 Click to see the full signature
Reply to
Jim Thompson

On a sunny day (Mon, 12 Jul 2010 17:28:44 -0500) it happened "Tim Williams" wrote in :

Yes, but one cannot do everything at the same time ..

Have not used IGBTs either.... IIRC the early ones could latchup, enough to keep me away.

'Not possible' is a bit strong statement perhaps.

To clarify things a bit, that TIP140 is a darlington, with build in resistors and it also shows a reverse diode. I did mention 'look up boost diode' in a previous reply in this thread. So what happens is a bit different scenario then you describe here, how else would you explain the parabolic waveform on that collector? Especially with regard to the drive signal. The fact that it is a darlington is what makes it possible to drive it directly from a 555.

I did one once with 2 thyristors, couple of 100 amps, transformer the size of a small PC, 50 Hz :-) It had a good magnetic fuse, when overloaded the thyristors would not switch off reliably. Was just a lab experiment. Ran from a 48 V, 1 kA, size of a small room, NiCad :-)

I am glad we agree, that was my point also.

Well, conservation of energy hold of course, unless you go nuculear and convert some from - to - mass. E = m.c^2

If you want to rant about perpetuum motion machines?

Well you must be aware that now you are attacking very respected people....

But that person is a politically supported great designer who even designed chips for Garmin 20 years ago. You must be wrong. Do you not think the laws of nature make an exception for him?

I think I lost you here, but am not too worried about it. Just one question: Do you have a theory on gravity too?

Anyways Tim, take it easy. Did you read this paper on quasi-resonant and resonant converters?

formatting link

Reply to
Jan Panteltje

Common misapprehension.

The *leakage inductance* of the HV transformer is tuned to either the third, (early monochrome), or fifth (color) harmonic of the *flyback* frequency, ie. three or five times the reciprocal of twice the flyback time.

For a 10 microsecond flyback time, that's 3 or 5 times 50kHz.

The effect is to flatten the peaks of the (half-sine) flyback pulses.

At one time, it was done by winding a few turns under the HV winding, and connecting an adjustable LC circuit to that. Latterly it was done by clever management of interwinding capacitance, hence self-resonant frequency.

It's surprising how many "authoritative" texts get this wrong.

--
"For a successful technology, reality must take precedence 
over public relations, for nature cannot be fooled."
 Click to see the full signature
Reply to
Fred Abse

It's short for "Ass-'OLE"

;-)

--
"For a successful technology, reality must take precedence 
over public relations, for nature cannot be fooled."
 Click to see the full signature
Reply to
Fred Abse

Chemists are funny people... they beat you to it :)

formatting link

Tim

--=20 Deep Friar: a very philosophical monk. Website:

formatting link

Reply to
Tim Williams

On a sunny day (Tue, 13 Jul 2010 08:09:06 -0700) it happened Fred Abse wrote in :

OK, I stand corrected:-)

management

Reply to
Jan Panteltje

You've missed out on Microsoft culture! It is "Object Linking and Embedded" and is related to the IOleObject interface.

Jon

Reply to
Jon Kirwan

On a sunny day (Tue, 13 Jul 2010 10:56:57 -0700) it happened Jon Kirwan wrote in :

True, I burned my xp disk :-)

Well I do not know what that is either, and am happy that way :-)

Reply to
Jan Panteltje

Oh, this predates XP! I think I first saw OLE as a term buried within some source code for Microsoft's MFC (Microsoft Framework Classes) code. A LONG TIME ago.

Hehe. Well, if you ever have nothing better to do than read through tens of thousands of pages of Microsoft dump-ware documentation, OLE is a good way to fiddle away a few months of your excess time.

Just imagine. You could invest years of your life learning about arcane rules and methods that Microsoft creates and which have NO other value than Microsoft products, which will become obsolete every 10 years anyway allowing you the great boon of having to relearn the 'next new thing' and restuff your memory with yet another set of arcane rules (YASAR) found in random locations on dozens of DVDs so that you don't get bored with life.

Being a Microsoft acolyte is a commitment to a treadmill you can never leave and where nothing you learn today will be of any use to you in a decade.

What's not to like? ;)

Jon

Reply to
Jon Kirwan

There's something to this, but Microsoft has largely just been "evolving" their interfaces for at least the past decade or so now... OLE kinda morphed into ActiveX and COM over time, so someone who learned about OLE early on will still have a lot of background for the later technologies there.

While I'm not a huge Microsoft fan, COM really does strike me as one technology that has no equal in the *NIX world in the sense that it's a single standard that *all* major applications use. With *NIX, many programs support a named pipe but the exact syntax and calling methodologies varies from one program to the next; there's not just a simple "function call"-like wrapper that has ever gained universal support in the *NIX world. In Windows it's trivial to embed, e.g., a MathCAD document into a Word document -- and the MathCAD document "comes to life" and plots, computes, etc. when clicked on -- whereas in, e.g., OpenOffice Write there simply is no generic interface to do that kind of thing.

I think Microsoft tends to activity speed up that treadmill, but the entire IT industry has that sort of treadmill anyway regardless of the OS you're using. After all, 20 years ago no *NIX guru anywhere had yet been exposed to Apache, and today it's the most dominant web server on the planet.

---Joel

Reply to
Joel Koltner

I'm speaking from a perspective that comes from starting with Windows 1 and eventually finding a barely usable system with Win286 and Win386, then a reasonable Win 3.0, and forward.

I've seen a great deal over that time.

There is good here, too. I don't mean to diminish that.

This isn't the group to delve into a deeper argument on these points. Most things are two-edged swords and COM is like that, as well. There is a price being paid as well as a benefit gained. Individual circumstances decide whether that is to your good or not.

Since I maintain some old systems around here and can make comparisons with very similar work being performed on widely varying machines and operating systems, it's harder for me to avoid seeing some of the downsides along with the upsides.

Yes, I'll take that point. But there is a bit of a "different pace," too, even there.

An example of a two-edged sword, not entirely unlike this discussion, is the modern technical media today. Over my lifetime there has been all manner of new styles of delivering news and doing it more quickly. New infrastructures make that possible. But there was a huge advantage to getting your news via snail mail and monthly periodicals, too. There was time to allow the dust to settle and for a more thorough investigation of the facts before laying out a story. And that, I do think, aided the public in some ways I miss, today.

But would we really want to _force_ news to be delayed? I doubt it. But that doesn't mean there isn't a price being paid, too. There is. And sometimes I don't know which is better.

I have mixed feelings about Windows. Deeply mixed.

(I come from having worked on operating systems and concurrent programming since the early 1970's, working first on HP2000F timesharing system, then on Unix v6 kernel and RSX-11M and RSTS in the 1970s, to VAX VMS kernel, and so on. I also have worked on chipset debugging for P2. I've seen a few things and I've seen much that used to be known well and applied very well become lost knowledge and very poorly implemented today, when there is no doubt in my mind that had they been well educated they would never have made those mistakes. Sadly, we are saddled with some of them.)

Jon

Reply to
Jon Kirwan

PADS uses OLE to dynamically connect their schematic and a PCB layout programs. Make a change on one and it's instantly made on the other. Enabling OLE is guaranteed to corrupt the schematic, the layout, or both.

One of my layout guys who liked to use the PADS OLE gave me a schematic to check. In the middle of sheet 9 was a color picture of his girlfriend. I didn't know that PADS-Logic could even incorporate photos. I tried to delete and it wouldn't. Turns out it was 12 copies deep, and if you kept at it, it would eventually go away. I can't imagine how she would have appeared on a netlist.

John

Reply to
John Larkin

How many ports ?:-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
 Click to see the full signature
Reply to
Jim Thompson

A 2-edged sword, as I wrote. And in many other ways, as well.

Jon

Reply to
Jon Kirwan

It's the guts of their component software model, COM. There's nothing wrong with component software as an idea, but MS' implementation relies on reference counting for garbage collection, which is why Windoze software is so flakey - a missed Release causes leaks, an extra Release causes crashes due to stale references. The software is full of both, with predictable results.

Reply to
Clifford Heath

Love connection?

Best regards, Spehro Pefhany

--
"it's the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
 Click to see the full signature
Reply to
Spehro Pefhany

On a sunny day (Tue, 13 Jul 2010 17:22:30 -0700) it happened Jon Kirwan wrote in :

Yep, that about sums it up. I have used MS Visual C for my job, and even wrote usable programs with it. I think these days it is even free, in fact, before I burned my xp disk I tried downloading it, but harddisk light on all the time, heavy net load, no clear idea *what* I was downloading, never an end to the 'auto updates', and I have a fast connection, How horrible it must be [to use MS soft] to do it on a laptop with a slow mobile connection. Now take this Linux as an opposite, still running grml Linux [

formatting link
old version, now for maybe 4 years, sure added packages, wrote many of the apps I use myself, 100 % stable. I run fvwm -the original window manager-, and do 90 % of things if not more in a rxvt or sometimes xterm [text terminal]. The childish stuff of clicking on pictures.... that all look alike and get smaller all the time as screen resolution increases (:-)), menus and sub menus, you have to know beforehand where it is else you never find it. So much faster just to type the program name. And if you have no clue anymore about the program name, but at least know about the subject (LOL), then simply type apropos subject and you will likely see related programs. Mouse sleeps next to keyboard, maybe because it is a 10 years old mouse and not used that intensively. Maybe if things would be right, then when you needed new hardware would be when you needed new software. I am tempted to install the latest grml (Linux OS) on an other disk on this system, now it holds an exact mirror of this disk... but so far every thing works, never fix something that works.

The only thing that remains in Microsoft pushing shit on websites so they only work right with their internet exploder... Not even with Opera. Balmer should be locked up for that. Or maybe those website makers only test on MS exploder.

Reply to
Jan Panteltje

Balmer should be locked up, but not for that. ;)

I had a short discussion with him during a lunch break some years ago after a presentation he made here in Portland. I rephrased what I'd just seen him telling us as a group, but turning it inside out and explaining it in very different terms and then asked him, "So is that the upshot of what you just said out there?"

He paused, then finally admitted, "Yes, I suppose so." The admission wasn't even close to the Gilded Lily version I'd just heard in public.

I wasn't happy to have had my worst impressions so readily confirmed, perhaps in such a weak moment near the buffet over a cup of coffee.

And it had something to do with why I concentrated much more on another course, started in earnest almost that very day. It was a bit of a life-changer conversation, I guess, for one person.

Jon

Reply to
Jon Kirwan

There is a free edition of it, although it doesn't come with various "fancier" tools that those working on more advanced projects would likely desire.

I do think one can credit gcc for convincing Microsoft to release a free version of it at all, though!

If you download a newer version of Linux (e.g., Ubuntu 10.04) you'll find it has plenty of auto-updates, tends to assume a fast Internet connection, and is more than happy to keep your hard drive light on a lot due to, e.g., Beagle Search or some other "whole system" indexing system.

Of course, as with Windows, all of this can be configured to a -- let's call it -- more "modest" setting.

Does it easily support multiple monitors (plug-and-play-wise)? Does it support monitors with resolutions of, oh, say, 2048x1152? I was bitten by X.Org not supporting 2048x1152 monitors if you wanted to use Compiz:

formatting link
. Windows has never had a problem with that...

Umm... if you're using a given point-size font in your terminals, the text will get smaller and smaller as screen resolution increases too. :-)

Yeah, keyboard shortcuts and command lines are almost always faster once you're familiar with them. One common exception is if you want to copy, say, all the files in a directory... except for three of them: Hitting Ctrl+A in a file explorer window to select all of them, Ctrl+clicking to deselect those three, and then dragging-and-dropping the selected ones to the destination is faster than most any command line-based approach.

For core UNIX commands, sure. For applications you install yourself... not so much. E.g., on the Linux box next to me here, I have...

Beyond Compare 2 -- "apropos compare" fails to find it VMware -- "apropos virtual machine" fails to find it PyNeighborhood -- "apropos network neighborhood" fails to find it

You'll recall that the folks who originally cooked up the mouse envisioned a mouse in one hand and a chording keyboard in the other. :-)

They have been publicly embarassed into making their browser rather more standards complaint than it used to be, but there also has to be some onus on the part of web page designers to not use IE-only features (or at least consciously be aware of which features are IE-only). Although I think it's also better today than, say, 10 years ago, many web page designers still have no idea there even are W3C standards and just know that they fire up, Frontpage/ExpressionWeb/etc., whip up a web page, post it, and call it good... after "testing" it with only with IE, of course.

---Joel

Reply to
Joel Koltner

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.