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John Larkin <jjlarkin@highlandtechnology.com>: Sep 23 07:21AM -0700 On Wed, 23 Sep 2015 09:31:20 -0400, Phil Hobbs   >> Cheers   >Al polys can make voltage regulators oscillate. Tantalums have a nice >middle-of-the-road ESR that makes 7800s happy.   My favorite cheap "MDO" regulator, the LM1117, loves a 10 uF tantalum on its output.

John Larkin <jjlarkin@highlandtechnology.com>: Sep 23 07:22AM -0700 >> electrolytic replacement.   >Sorry, I forgot to mention to put the resistance in between the power >line and the tantalum.   But than it doesn't bypass the power rail!

John Larkin <jjlarkin@highlandtechnology.com>: Sep 23 07:24AM -0700 On Wed, 23 Sep 2015 16:01:26 +1000, Trevor Wilson >aluminium electros (not a scientific study though - just seat of the >pants). They do not tolerate reverse Voltages particularly well though.   >Use another tantalum. Solid are best, but hard to find.   Most tantalum caps are solids, with the MnO2 electrolyte. Less common are liquid types and polymers.

"Ralph Mowery" <rmowery28146@earthlink.net>: Sep 23 10:44AM -0400 <mroberds@att.net> wrote in message news:mtt9f3$96p$1@dont-email.me... > across the fuse or across the power switch. I suspect there are places > for all of these resistors on the board, but they don't populate them at > the factory except for test.   That is somewhat of a crazy schematic. I bet some of the NU resistors could be some 0 ohm resistors. They are mainly jumper wires made inside a blob of material that resembles a resistor in size. They have been used to be in inserted by machine to jump over places where a circuit trace can not be made.

joe hey <joehey@mailinator.com>: Sep 23 03:24PM On Wed, 23 Sep 2015 07:22:29 -0700, John Larkin wrote:     >>Sorry, I forgot to mention to put the resistance in between the power >>line and the tantalum.   > But than it doesn't bypass the power rail!   No, we did it locally, every IC that was uncoupled with a tantalum, we put a small resistor from the power rail to the tantalum and the problem was solved. I clearly remember reading this advice in some tantalum's datasheet or application note. As those IC's consume very little, the DC voltage drop over the resistance was negligible, but the reduction in current spikes through the tantalums was considerable. They didn't blow up anymore and neither did the IGBTs.   joe

Cydrome Leader <presence@MUNGEpanix.com>: Sep 23 04:08PM > middle-of-the-road ESR that makes 7800s happy.   > The ignition problem is quite real--see > <http://electrooptical.net/www/sed/TantalumCapReforming_25272-what_a_cap_astrophe.pdf>   Can somebody decode "postprocessing fixture" back into English? I have idea what the author is talking about or what the "fix" really was.

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Sep 23 12:26PM -0400 On 09/23/2015 12:08 PM, Cydrome Leader wrote: >> <http://electrooptical.net/www/sed/TantalumCapReforming_25272-what_a_cap_astrophe.pdf>   > Can somebody decode "postprocessing fixture" back into English? I have > idea what the author is talking about or what the "fix" really was.   He ramped up the supply slowly with a current limit, to give the tants a chance to clear the damage.   Cheers   Phil Hobbs   -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics   160 North State Road #203 Briarcliff Manor NY 10510   hobbs at electrooptical dot net http://electrooptical.net

rickman <gnuarm@gmail.com>: Sep 23 12:41PM -0400 On 9/23/2015 12:26 PM, Phil Hobbs wrote: >> idea what the author is talking about or what the "fix" really was.   > He ramped up the supply slowly with a current limit, to give the tants a > chance to clear the damage.   Is it about clearing damage or just to show the added resistance prevented the failure? I found the story a bit hard to follow.   --   Rick

vdvbert@gmail.com: Sep 23 02:06AM -0700 if I connect the red 5v+ wire (pin4) from the peripheral connector on a atx pc power supply to the red wire on a USB cable and the black com wire(pin 2 or 3) from the peripheral connector on a atx pc to the black wire on a USB cable will this charge my phone when I put the power supply on and usb connector in my phone? Or do i have to insert other components in between? thx in advance

Cydrome Leader <presence@MUNGEpanix.com>: Sep 23 03:58PM > if I connect the red 5v+ wire (pin4) from the peripheral connector on a atx pc power supply to the red wire on a USB cable and the black com wire(pin 2 or 3) from the peripheral connector on a atx pc to the black wire on a USB cable will this charge my phone when I put the power supply on and usb connector in my phone? > Or do i have to insert other components in between? > thx in advance   If you get the pinouts on mini or microusb correct, no problem. Most phone chargers are dumb and just output 5 to 5.2 volts.   a fuse would be a good thing to add if you're connecting directly to your powers supply. Standard USB ports on your computer are current limited or protected. 1 amp should be fine, it's just to prevent fireworks if the cable or connectors get damaged.

"Steve W." <csr684@NOTyahoo.com>: Sep 23 10:00AM -0400 Bob F wrote:   > I bet white collar crime would be a lot more affected by serious prosecutions > than random murders. Maybe someday, we'll see it happen. This is not just a US > crime.   Won't happen. I would bet there will be a software "patch" that will erase the different testing maps, the cars will then meet the original EPA standards BUT they won't be getting the high mpg numbers that owners bragged about.   The folks who did modifications will likely refuse to bring their cars in and the EPA will just issue a VIN list saying these cars are no longer legal for road use in the US, registrations and insurance would be revoked.   VW might just decide to leave the market in the US.   -- Steve W.

"Steve W." <csr684@NOTyahoo.com>: Sep 23 10:23AM -0400 Ed Pawlowski wrote: > engineers. Someone had to come up with the idea, design, build, test, > and approve everything. The guys on the line installing would probably > have no idea, just another part. Higher level in engineering would know.   The only real change is in the code map in the ECM. They basically had a "normal" map for constant driving and a "test map" that only engaged when undergoing tests. I would bet it took fewer that 10 people to do the entire thing.   You need to consider that the engineers already know how to make the engine run and get good mileage and wrote the software to do that. However that programming didn't pass the EPA testing.   The actual program change is easy. It could be hidden just about anywhere but is likely very simple. Something like IF the engine is running at XXX rpm but there is a connector in the OBD test port, with no input from the steering rack and the parking brake is set, add 2% fuel enrichment to the drive cycle.   Extra fuel cools the fuel burn and drops the NOx to legal limits. Car passes.     -- Steve W.

"Mayayana" <mayayana@invalid.nospam>: Sep 23 10:39AM -0400 | > But the possibilty of real prison time will make them think before doing the | > crime.   | But most criminals think they will never be caught so prison is little | deterrent.   By that logic there is no role in society for a criminal justice system. You paint it as just black and white.   There's a far bigger group in between -- People who will do immoral things only if they know there's no risk and no one will see them. Those are two factors: personal conscience and risk of suffering. Risk is also related to one's position. A multi-millionaire executive with a family has more to lose than most people.   Isn't public civility really a combination of personal conscience and risk of punishment? That's why we have locks on doors and windows. The doors can be kicked in fairly easily. Windows can be broken. But the need for force deters most people. They have to be more aggressive and more intent on stealing in order to break in. Most people will be stopped by their conscience, their fear, their common sense strategy to avoid suffering, or all those things, before breaking into your house.   On the other hand, if you leave your laptop sitting on your front steps, someone passing by doesn't need to be aggressive or intrude. They can also rationalize that maybe you meant to give it away. A lot more people will take that laptop than will break in to take it.   Much of what we do in shame we do with such a rationalization. Our thinking mind lies to itself to justify satisfying our impulse. Some people are better at lying to themselves than other people. (Which is the essence of true laziness.) But we all do it in degrees. The less adept we are at lying to ourselves, the less likely we are to do something we consider wrong if there's a risk that someone else may bear witness. We have to be lying to ourselves on the level of psychosis to ignore the risk of punishment or other ramifications.   The CEO of VW is so far refusing to acknowledge guilt on his own part, but if he were risking jail time, along with his sidekicks and yes-men, it's a good bet the software cheat never would have happened. He's almost certainly a man obsessed with wealth and power to have got to where he is. Jail is the opposite of that. He's almost certainly not fully psychotic. He just imagines he's out to "win" at something. That kind of obsession helps people to lie to themselves. But it's likely that he wouldn't have put his position at such risk if it meant risking all of his chips for just a slightly bigger win. Even if he doesn't feel shame, the threat of jail would probably temper his obsession.   As things stand now, it's easy for the people at the top to lie to themselves because the justice system is pretending that the corporation itself -- a mere legal/financial/tax entity -- was the perpetrator of the crime.

"Dean Hoffman" <dh0496@windstream.net>: Sep 23 10:42AM -0500 On Fri, 18 Sep 2015 19:19:10 -0500, Ewald Böhm <ewvesb@gilltaylor.ca> wrote:   > etc.   > My question is HOW did the car *know* it was being *tested* for > emissions?   The CEO of VW is stepping down. http://preview.alturl.com/jxppg It's too bad he's German. We might run out of candidates for U.S. President.     -- Using Opera's mail client: http://www.opera.com/mail/

"." <.@dot.com>: Sep 23 10:54AM -0500 On 9/19/2015 9:36 AM, . wrote: > cause of accidents nor does smog testing of these vehicles > lead to measurably cleaner air. These two concerns are best > addressed at time of manufacture.   The VW case is a conspicuous textbook example of how and why emissions testing is a doomed to failure approach similar to solving drug abuse by arresting individual users. As even the admitted guilty party have undeniably exposed, emissions control MUST be properly addressed at the point of manufacture.

"." <.@dot.com>: Sep 23 10:55AM -0500 On 9/19/2015 9:36 AM, . wrote: > cause of accidents nor does smog testing of these vehicles > lead to measurably cleaner air. These two concerns are best > addressed at time of manufacture.   The VW case is a conspicuous textbook example of how and why emissions testing is a doomed to failure approach similar to solving drug abuse by arresting individual users. As even the admitted guilty party have undeniably exposed, emissions control MUST be properly addressed at the point of manufacture.

Winston_Smith <invalid@butterfly.net>: Sep 22 04:58PM On Tue, 22 Sep 2015 11:37:58 -0500, GlowingBlueMist wrote:   > needed to be cleared out of memory after the final upgrade that was > needed. A pain having to put the configuration back in manually but for > me anyway it did the trick.   Googling, I found on the ubnt forum that this is a nascent problem, which is just emerging, which appears to be related to new statistics software that Ubiquiti added to the latest release (which is, apparently, buggy).   More to come, I'm sure...

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