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I've seen caution alerts for less!collinsmark said:
Today I Learned
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1oldman2
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TIL, That all this time I thought my dog was named after a moon of Uranus (Oberon), today I saw the spelling is Oberyn and the name comes from Game of thrones. 
Pepper Mint
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Today I learned
He is the king of fairies!1oldman2 said:TIL, That all this time I thought my dog was named after a moon of Uranus (Oberon), today I saw the spelling is Oberyn and the name comes from Game of thrones.
1oldman2
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Oh no! His other designation is Uranus IV, a china company a brewery etc. etc. according to Wiki, I'm laughing in my mind.Pepper Mint said:
Could this be associated with fairy rings?
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I hope this helps somebody
Today i learned why there are so many laptop power receptacles for sale on Ebay.
Mine got to where i had to hold it to make contact. Then it quit altogether .
I might've mentioned that earlier... i promised pictures.
First fix only lasted a couple weeks.
It cracked right behind the connector
here's the connector
here's where it cracked
how the small things of the Earth confound the mighty, eh ?...
Okay, first time i just soldered over the crack.
and
had to reassemble it multiple times because i kept forgetting to hook up cables or leaving out parts
and two of the little black retainer clamps that hold the flat cables into their connectors crumbled away
this one killed my sound and usb ports
other one disabled the power switch but a matchstick held it sort of in place
After a couple weeks the power connector cracked again
so That day I Relearned "You can't use solder to replace mechanical strength"...
So i took it all apart again
pulled that rear piece out , the L shaped one (that cracked ) at rear of power connector going down to the board,
... replaced it with a piece of flexible #24 wire
sorry, i didnt get an "after" picture
I wrapped the teeny wire around that short stub at connector backside, where the crack is, and soldered it in place there and down on the board leaving a stress relief loop in it.. Now if it needs to flex it can do so. It only has to handle 3 amps which #24 can do .
@Planobilly i sure need better soldering equipment for this newfangled stuff. It's Hideously tiny.
Put it back together again - and lost another little black connector. retainer/clamp. Screen wouldn't work.
Rats ! This is getting old !
off to computer shop to see if he has a junkpile with boards to scrounge little black connector retainer thingies, no luck.
Let it sit two days while i resist the urge to "Terminate" ...
Okay one last try
i looked for plastic about the right thickness to jam into those connectors to hold the flat cables down in lieu pf proper retainers .
Aha ! trial and error ... uswag too...
the top from a cottage cheese container is nice polyethylene and proved a snug fit.
With magnifier glasses and scissors i cut pieces to size and was able to work them in under the pins with needle nose pliers.
Flat cables are nice and tight now without matchsticks(which didnt work well anyway) .
.At last, tonight, old laptop is going again . It ran four years prior without hardware trouble, touchpad shows the miles.. It owes me nothing .
...here it is all back together except keyboard .
Tools point to connector in previous picture.
.
Whew !
i made this post with it -Sorry if i bored you. Hope it helps somebody.
old jim
Today i learned why there are so many laptop power receptacles for sale on Ebay.
Mine got to where i had to hold it to make contact. Then it quit altogether .
I might've mentioned that earlier... i promised pictures.
First fix only lasted a couple weeks.
It cracked right behind the connector
here's the connector
here's where it cracked
how the small things of the Earth confound the mighty, eh ?...
Okay, first time i just soldered over the crack.
and
had to reassemble it multiple times because i kept forgetting to hook up cables or leaving out parts
and two of the little black retainer clamps that hold the flat cables into their connectors crumbled away
this one killed my sound and usb ports
other one disabled the power switch but a matchstick held it sort of in place
After a couple weeks the power connector cracked again
so That day I Relearned "You can't use solder to replace mechanical strength"...
So i took it all apart again
pulled that rear piece out , the L shaped one (that cracked ) at rear of power connector going down to the board,
... replaced it with a piece of flexible #24 wire
sorry, i didnt get an "after" picture
I wrapped the teeny wire around that short stub at connector backside, where the crack is, and soldered it in place there and down on the board leaving a stress relief loop in it.. Now if it needs to flex it can do so. It only has to handle 3 amps which #24 can do .
@Planobilly i sure need better soldering equipment for this newfangled stuff. It's Hideously tiny.
Put it back together again - and lost another little black connector. retainer/clamp. Screen wouldn't work.
Rats ! This is getting old !
off to computer shop to see if he has a junkpile with boards to scrounge little black connector retainer thingies, no luck.
Let it sit two days while i resist the urge to "Terminate" ...
Okay one last try
i looked for plastic about the right thickness to jam into those connectors to hold the flat cables down in lieu pf proper retainers .
Aha ! trial and error ... uswag too...
the top from a cottage cheese container is nice polyethylene and proved a snug fit.
With magnifier glasses and scissors i cut pieces to size and was able to work them in under the pins with needle nose pliers.
Flat cables are nice and tight now without matchsticks(which didnt work well anyway) .
...here it is all back together except keyboard .
Tools point to connector in previous picture.
.
Whew !
i made this post with it -Sorry if i bored you. Hope it helps somebody.
old jim
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Planobilly
Gold Member
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About Jim's laptop repair...
It is pretty inspiring than anyone would even attempt to repair a laptop in the first place. It is obvious that consumer computer devices are not designed to be long lasting or designed to be repaired. I have a hard time even speaking in a polite manner about such 'Hideously tiny" contraptions..lol
At first glance, one would think, a repair of this nature would fall into the realm of"electronics repair". The truth is that, it is more complex than just re-flowing a solder joint as Jim discovered in finding a solution to the issue. This is a "moving part" and the electrical chord can put all kinds of stresses on the removable connection device and it's connection to the PCB.
I assume there was little attention given to the mechanical characteristics of the connector during the design of the laptop. I have little doubt the the concept of "modulus of elasticity or resilience" ever came up even in passing conversation as it pertains to this component...lol
Repairing anything in today's world is a concept that is rapidly fading into ideas and methods of a distance past. We are increasingly living in a disposable world and "drowning on dry land" in a sea of junk.
Cheers,
Billy
It is pretty inspiring than anyone would even attempt to repair a laptop in the first place. It is obvious that consumer computer devices are not designed to be long lasting or designed to be repaired. I have a hard time even speaking in a polite manner about such 'Hideously tiny" contraptions..lol
At first glance, one would think, a repair of this nature would fall into the realm of"electronics repair". The truth is that, it is more complex than just re-flowing a solder joint as Jim discovered in finding a solution to the issue. This is a "moving part" and the electrical chord can put all kinds of stresses on the removable connection device and it's connection to the PCB.
I assume there was little attention given to the mechanical characteristics of the connector during the design of the laptop. I have little doubt the the concept of "modulus of elasticity or resilience" ever came up even in passing conversation as it pertains to this component...lol
Repairing anything in today's world is a concept that is rapidly fading into ideas and methods of a distance past. We are increasingly living in a disposable world and "drowning on dry land" in a sea of junk.
Cheers,
Billy
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That reminds me of this story.
Expected "repair" costs: $4500 to replace the battery pack in a hybrid car.
Actual repair costs at home: $10 for chemicals and a few hours of work
Needs experience with high voltage, however, and certainly kills any warranty for any parts.
Expected "repair" costs: $4500 to replace the battery pack in a hybrid car.
Actual repair costs at home: $10 for chemicals and a few hours of work
Needs experience with high voltage, however, and certainly kills any warranty for any parts.
Gold Member
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Hopefully this isn't you cleaning the magnets buss bars.mfb said:
image compliments of http://www.supraconductivite.fr/en/index.php?p=applications-accelerateurs
ProfuselyQuarky
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Today I learned how to hold a barre chord! 
Pepper Mint
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TIL a monthly income for a cleaner in the US is around $1600.
1oldman2
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TIL, That in December of 1944 the US army dispatched OSS agent (and former baseball star) Moe Burg to Switzerland to assassinate W. Heisenberg. After a period of time the hit was called off due to lack of opportunity, W. H. was much more fortunate than many physicists in Stalin's purges, makes me wonder how many in science have died over politics...
zoobyshoe
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I take it they were afraid Heisenberg was working on a bomb?1oldman2 said:
1oldman2
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Exactly, I came across this while reading "American Prometheus" a great bio of J. R. Oppenheimer. I highly recommend the book.zoobyshoe said:
Stephanus
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Are you certain?1oldman2 said:
1oldman2
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Since this deals with Heisenberg there is an uncertainty principal involved.Stephanus said:
the info is provided on page 222 in the book I mentioned.- 9,864
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i think there was an episode about that in the series "Heavy Water Wars", which we stumbled across on Netflix.zoobyshoe said:
OCR
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Stephanus
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Today I learned, actually yesterday, that...
for multi cores processor there are as many as register set as the cores.
So for a computer with four cores there are 4 AX, 4 BX, 4 CX set.
And for hyperthreading cores, there are twice number of register set as opposed to non hyperthreading.
Thank you very much PF Forum.
for multi cores processor there are as many as register set as the cores.
So for a computer with four cores there are 4 AX, 4 BX, 4 CX set.
And for hyperthreading cores, there are twice number of register set as opposed to non hyperthreading.
Thank you very much PF Forum.
OCR
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Stephanus said:
Oh my.....
That was a joke, wasn't it ? ...
And it certainly was not an observable by me.....
...
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CynicusRex
Gold Member
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Smartphone GPS does not work on the ISS.
"Commercial GPS equipment is hardcoded to not work at great altitude or at great speed to prevent GPS being used to guide weapons." –Robert Frost
"Commercial GPS equipment is hardcoded to not work at great altitude or at great speed to prevent GPS being used to guide weapons." –Robert Frost
Gold Member
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Seems like overkill unless the U.S. thinks that North Korea is using iPhones to guide their missles.TheBlackAdder said:
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Using commercial devices would certainly be more convenient than writing the software on your own. But yeah, if you can make a nuclear weapon and an intercontinental missile you can probably write code to determine your location and speed based on GPS signals.Borg said:Seems like overkill unless the U.S. thinks that North Korea is using iPhones to guide their missles.
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But at least they won't have sleek, stylish nukes...Borg said:Seems like overkill unless the U.S. thinks that North Korea is using iPhones to guide their missles.
1oldman2
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Their "PR" department is hard at work on that problem.Ibix said:
1oldman2
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TIL, while browsing http://isslive.com/operations.html I learned that I have the training to perform at least one aspect of "contingency maintenance" aboard the ISS 
(This is a useful site for space geeks)
(This is a useful site for space geeks)- 37,498
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But can you bang with a hammer transferring an impulse of 0.6 kg m/s within 10% tolerance?
OmCheeto
Gold Member
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1oldman2 said:TIL, while browsing http://isslive.com/operations.html I learned that I have the training to perform at least one aspect of "contingency maintenance" aboard the ISS
...
First, we have to define; "hammer".
OmCheeto said:
Just got back from a minor vacation, where my friends and I stayed in an AirBnB.
At one point, I broke the closet door in the hallway. "It won't close!"
One of my friends said; "Just kick it!"
So I did, and it fixed the problem.
TIL, that, IMHO, hammers, in all their incarnations, are most awesome tools.
Pepper Mint
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Greg, TIL a Mexican of C++ gave your PF mobile product only 3 stars 
Stephanus
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Hammers? But I think ISS is mostly United States', (although the "I" stands for International) not Russian's.1oldman2 said:TIL, while browsing http://isslive.com/operations.html I learned that I have the training to perform at least one aspect of "contingency maintenance" aboard the ISS
View attachment 103162
I can't help but remember a scene in Armageddon Movie.
There's a malfunction in "Freedom" shuttle ship. And here's the dialog between two astronouts.
American: Don't touch that you don't know American components.
Russian: American components, Russian components all made in Taiwan!
And the Russian produces a hammer, bangs it twice and voila! It starts.