Digest for sci.electronics.repair@googlegroups.com - 7 updates in 4 topics

Cydrome Leader <presence@MUNGEpanix.com>: Oct 05 04:32PM


> The designers must have found it expedient to use an off-the-shelf
> adapter, even though it has reduced reliability and they did not need
> the available current.
 
Was this a switching regulator? I've ripped apart a bunch of car adapters
for phones and just USB power and they're all essentially the same device.
Some have a pilot LED, some have fuses, some are rated 12-24V in, but
everything else is the same, and also circles a 8 pin chip.
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Oct 05 10:30AM -0400

On 10/03/2015 04:02 PM, John Larkin wrote:
 
>> Best regards, Piotr
 
> Check the distribs, but I think not. The CV products seem low, like
> 4700 at 2.5v. Don't know why.
 
Well, in LV SMPSes you really really care about ESR.
 
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
"Klaatu" <whichway@today.org>: Oct 04 04:39PM -0500

"Ewald Böhm" <ewvesb@gilltaylor.ca> wrote in message
news:mti9lu$jb$1@news.mixmin.net...
> http://hothardware.com/news/vw-intentionally-programmed-engine-software-to-cheat-emissions-tests-forced-by-epa-to-recall-482k-vehicles
> etc.
 
> My question is HOW did the car *know* it was being *tested* for emissions?
 
 
According to NBC, the emission controls were altered when only the front
wheels were turning, as on a dynometer.
 
 
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sms <scharf.steven@geemail.com>: Oct 04 07:33PM -0700

On 10/4/2015 2:39 PM, Klaatu wrote:
>> emissions?
 
> According to NBC, the emission controls were altered when only the front
> wheels were turning, as on a dynometer.
 
I don't know about diesels, but newer gasoline powered cars in
California don't use the dyno anymore. The levels are all read from the
sensors via the OBD-II port, at least in California.
Clifford Heath <no.spam@please.net>: Oct 05 03:04PM +1100

On 05/10/15 13:33, sms wrote:
> I don't know about diesels, but newer gasoline powered cars in
> California don't use the dyno anymore. The levels are all read from the
> sensors via the OBD-II port, at least in California.
 
It's trivial to detect that the car is not being driven.
No steering wheel motion, no compass variation, no accelerometer (if
fitted), no... you name it, I'm sure there's a long list of candidates.
mike <ham789@netzero.net>: Oct 05 12:05AM -0700

On 10/4/2015 9:04 PM, Clifford Heath wrote:
 
> It's trivial to detect that the car is not being driven.
> No steering wheel motion, no compass variation, no accelerometer (if
> fitted), no... you name it, I'm sure there's a long list of candidates.
YOu're overthinking it. It's about driveability
If the rear wheels ain't turning, you should turn on the emission
controls. When the car is stopped in traffic, might as well make it
clean. Performance isn't an issue when stopped.
I'd have taken it a step further and made it clean whenever driveability
isn't compromised...like when not accelerating at a rate faster than
you could do with the emission controls functioning.
Probably would never have been detected.
harry.beukenoot2@gmail.com: Oct 04 11:51AM -0700

Op donderdag 25 maart 2010 09:54:35 UTC+1 schreef Dave Bullock:
> Thanks in anticipation
> Dave
> Amateur Radio club of Nottingham.
 
Dear Dave,
 
I have exactly the same problem with my Chase receiver, did you manage to fix this problem? Hope to hear from you.
Many thanks
Jim
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