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Fixer
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 Posted: Fri Oct 03, 2008 12:32 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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"John Williamson" <johnwilliamson@btinternet.com> wrote in message
news:6kkkmfF8dol4U1@mid.individual.net...
[quote]Peter Hucker wrote:
Snipping
BTW, I>d have to emulate a battery - the laptop will expect to be
able to communicate with it to know how full it is, and no I>m too
un-knowledgable and lazy to build something that complex.
I believe most laptops figure out how much of a charge the battery is in
by
its output voltage. So I don>t think that would be a problem. The tricky
part would be if you ever used both DC inputs at the same time. Then the
stock one just might want to charge the battery emulator. But I believe
this
wouldn>t be a problem for most people.
I was assuming the other connectors on the battery were there for a
reason. Are you sure about the laptop not needing them?
They>re there to let the laptop charging circuitry monitor the battery
temperature while charging, usually. Sometimes, there>s a way for the
laptop to monitor individual cells, but that>s rare.
--
Tciao for Now!
John.
[/quote]
Why over complicate the situation, just buy another board off Ebay £40 for
the D600 |
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Guest
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| Posted: Fri Oct 03, 2008 2:09 pm Post subject: Re: How do I measure signals in the GHz range? |
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On Oct 3, 7:42 am, Hans-Bernhard Bröker <HBBroe...@t-online.de> wrote:
[quote][F>up2 was missing --- fixed]
a7yvm109gf...@netzero.com wrote:
On Oct 2, 6:19 am, "Saul Bernstein" <jiffyl...@freenet.de> wrote:
In addition, the signals I would like to measure on the board are routed
differentially (selfevident at the frequencies!), so that differential probe
What>s so "self-evident" about it? Your sat TV receiver works at 12GHz
and is 100% unbalanced.
Pardon the French, but that>s nonsense. Nothing in a sat receiver works
at 12 GHz. That>s self-evident if you take just a quick look at the
antenna cable --- no way a 12 GHz signal can survive 10+ meters of that
coax cable and connectors.
The only place 12 GHz take place in a sat TV setup is in the LNB (for
those who don>t know: that>s the gadget at the end of that arm, near the
center of the dish). From there onwards the signal is in the 1..2 Ghz
range, at most.
[/quote]
You>re right, I meant the LNB. But there>s nothing self-evident about
going differential at a certain frequency.
And I consider the antenna and LNB to be part of the receiver. :)
If a signal won>t survive in a coax, it won>t survive any better just
because you use two... |
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John Williamson
Guest
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| Posted: Fri Oct 03, 2008 3:25 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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Fixer wrote:
[quote]"John Williamson" <johnwilliamson@btinternet.com> wrote in message
news:6kkkmfF8dol4U1@mid.individual.net...
Peter Hucker wrote:
Snipping
BTW, I>d have to emulate a battery - the laptop will expect to be
able to communicate with it to know how full it is, and no I>m too
un-knowledgable and lazy to build something that complex.
I believe most laptops figure out how much of a charge the battery is in
by
its output voltage. So I don>t think that would be a problem. The tricky
part would be if you ever used both DC inputs at the same time. Then the
stock one just might want to charge the battery emulator. But I believe
this
wouldn>t be a problem for most people.
I was assuming the other connectors on the battery were there for a
reason. Are you sure about the laptop not needing them?
They>re there to let the laptop charging circuitry monitor the battery
temperature while charging, usually. Sometimes, there>s a way for the
laptop to monitor individual cells, but that>s rare.
--
Tciao for Now!
John.
Why over complicate the situation, just buy another board off Ebay £40 for
the D600
If it were me doing it, I>d have just set a regulated supply to whatever[/quote]
voltage it said on the battery & used a couple of clips to connect it
up. The OP wants a more elegant solution. Alternatively, I>d have bought
another laptop of the same type & kept mine for spares.
--
Tciao for Now!
JOhn. |
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Adrian C
Guest
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| Posted: Fri Oct 03, 2008 4:06 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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John Williamson wrote:
[quote]Why over complicate the situation, just buy another board off Ebay £40
for the D600
[/quote]
Agree. Even further I>d have sourced and replaced the socket - or found
someone experienced to do it...
You can find them for £4 on eBay including post.
e.g item 160201497944
Service manual for the D600 here
http://support.dell.com/support/edocs/systems/latd600/sm/index.htm
Useful website
http://www.laptoprepair101.com
--
Adrian C |
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Peter Hucker
Guest
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| Posted: Fri Oct 03, 2008 10:29 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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On Thu, 02 Oct 2008 20:08:10 +0100, BillW50 <BillW50@aol.kom> wrote:
[quote]In news:op.uies8zg44buhsv@fx62.mshome.net,
Peter Hucker typed on Thu, 02 Oct 2008 19:20:49 +0100:
On Thu, 02 Oct 2008 16:22:00 +0100, BillW50 <BillW50@aol.kom> wrote:
In news:op.uh5lc30z4buhsv@fx62.mshome.net,
Peter Hucker typed on Sat, 27 Sep 2008 19:52:05 +0100:
On Sat, 27 Sep 2008 19:47:55 +0100, John Williamson
johnwilliamson@btinternet.com> wrote:
Peter Hucker wrote:
On Fri, 26 Sep 2008 21:54:02 +0100, Adrian C <email@here.invalid
wrote:
Peter Hucker wrote:
Amend your sig please the RFC says FOUR lines only.
The RFC was written in 1802.
With an attitude like that you have probably now killed your
chance of getting a sensible answer from usenet.
In my experience there are very few that care about things like
sig size and line length any more.
Obviously some here do, or you>d have got a polite answer by now.
I>ve got loads of polite answers, not necessarily all in here, I
posted the query to loads of groups.
The last time I saw anything likw what you describe was the
optional mains adaptor for a Panasonic camcorder in about 1990.
That rings a bell. It>s possible that>s what I>m thinking of.
Of course, you *could* always design & build one yourself using off
the shelf components from Maplins. It>s not rocket science.
It>s the battery connector that would suck. Maybe I should
dismantle a dead battery?
BTW, I>d have to emulate a battery - the laptop will expect to be
able to communicate with it to know how full it is, and no I>m too
un-knowledgable and lazy to build something that complex.
I believe most laptops figure out how much of a charge the battery
is in by its output voltage. So I don>t think that would be a
problem. The tricky part would be if you ever used both DC inputs at
the same time. Then the stock one just might want to charge the
battery emulator. But I believe this wouldn>t be a problem for most
people.
I was assuming the other connectors on the battery were there for a
reason. Are you sure about the laptop not needing them?
It is hard to say depending on the design. But I have done it before and it
worked fine. The other connectors are usually there for safety and the
charging circuit which you don>t need anyway.
Although keep in mind, the AC adapters are a few volts higher than what the
battery voltage is. And I wouldn>t feed too much higher than the battery. So
I wouldn>t feed the original supply into it. But whatever supply you use, it
should be well regulated.
[/quote]
I>ll give it a shot. The laptop is otherwise useless anyway (apart from spares - but then I>ve got lots with the same spares now!)
--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com
A single blonde pregnant girl goes to the grocery store. A couple that she knows notices she>s pregnant.
The lady asks her, "Whose baby is it?"
The blonde says, "Well, I don>t know they are going to do blood tests, but I think it>s mine." |
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Peter Hucker
Guest
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| Posted: Fri Oct 03, 2008 10:30 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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On Fri, 03 Oct 2008 08:32:29 +0100, Fixer <steve.haberfield@ntlworld.com> wrote:
[quote]
"John Williamson" <johnwilliamson@btinternet.com> wrote in message
news:6kkkmfF8dol4U1@mid.individual.net...
Peter Hucker wrote:
Snipping
BTW, I>d have to emulate a battery - the laptop will expect to be
able to communicate with it to know how full it is, and no I>m too
un-knowledgable and lazy to build something that complex.
I believe most laptops figure out how much of a charge the battery is in
by
its output voltage. So I don>t think that would be a problem. The tricky
part would be if you ever used both DC inputs at the same time. Then the
stock one just might want to charge the battery emulator. But I believe
this
wouldn>t be a problem for most people.
I was assuming the other connectors on the battery were there for a
reason. Are you sure about the laptop not needing them?
They>re there to let the laptop charging circuitry monitor the battery
temperature while charging, usually. Sometimes, there>s a way for the
laptop to monitor individual cells, but that>s rare.
--
Tciao for Now!
John.
Why over complicate the situation, just buy another board off Ebay £40 for
the D600
[/quote]
If I could remove the board easily, I could simply replace the power connector.
--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com
Today we mourn the passing of a beloved old friend, Mr. Common Sense. Mr. Sense had been with us for many years. No one knows for sure how old he was since his birth records were long ago lost in bureaucratic red tape.
He will be remembered as having cultivated such valuable lessons as knowing when to come in out of the rain, why the early bird gets the worm and that life isn>t always fair. Common Sense lived by simple, sound financial policies (don>t spend more than you earn) and reliable parenting strategies (adults, not kids, are in charge).
His health began to rapidly deteriorate when well intentioned but overbearing regulations were set in place. Reports of a six-year-old boy charged with sexual harassment for kissing a classmate; teens suspended from school for using mouthwash after lunch; and a teacher fired for reprimanding an unruly student, only worsened his condition.
Mr. Sense declined even further when schools were required to get parental consent to administer aspirin to a student; but, could not inform the parents when a student became pregnant and wanted to have an abortion.
Finally, Common Sense lost the will to live as the Ten Commandments became contraband; churches became businesses; and criminals received better treatment than their victims.
Common Sense finally gave up the ghost after a woman failed to realize that a steaming cup of coffee was hot, she spilled a bit in her lap, and was awarded a huge settlement.
Common Sense was preceded in death by his parents, Truth and Trust; his wife, Discretion; his daughter, Responsibility; and his son, Reason. He is survived by two stepbrothers; My Rights and Ima Whiner. Not many attended his funeral because so few realized he was gone. |
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Peter Hucker
Guest
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| Posted: Fri Oct 03, 2008 11:17 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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On Fri, 03 Oct 2008 12:06:20 +0100, Adrian C <email@here.invalid> wrote:
[quote]John Williamson wrote:
Why over complicate the situation, just buy another board off Ebay £40
for the D600
Agree. Even further I>d have sourced and replaced the socket - or found
someone experienced to do it...
You can find them for £4 on eBay including post.
e.g item 160201497944
Service manual for the D600 here
http://support.dell.com/support/edocs/systems/latd600/sm/index.htm
Useful website
http://www.laptoprepair101.com
[/quote]
The guy who said he couldn>t go that far down the layers of the laptop used to be in power supply design and is pretty experienced.
--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com
If you can>t beat your computer at chess, try kick boxing. |
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Adrian C
Guest
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| Posted: Sat Oct 04, 2008 5:02 am Post subject: Re: Laptop power adaptor using battery bay and connector? |
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Peter Hucker wrote:
[quote]
The guy who said he couldn>t go that far down the layers of the
laptop used to be in power supply design and is pretty experienced.
[/quote]
He probably has valid experience but little patience for things that
initially look pasted together. Fortunately they are not.
Both you and him and the service manual could get this sucker apart and
do the necessary. Just work on your oldest one first, don>t lose the
screws and other small bits (I use clip>n>seal plastic bags), zap
circuitry with finger static, work on the carpet, have other
distractions, leave food inside or apply force in the wrong direction.
Take your time ;-)
Once you>ve done a few, then the process isn>t as duanting as it first
seems. May even make you some money one day ...
--
Adrian C |
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Peter Hucker
Guest
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| Posted: Sat Oct 04, 2008 1:41 pm Post subject: Re: Laptop power adaptor using battery bay and connector? |
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On Sat, 04 Oct 2008 01:02:52 +0100, Adrian C <email@here.invalid> wrote:
[quote]Peter Hucker wrote:
The guy who said he couldn>t go that far down the layers of the
laptop used to be in power supply design and is pretty experienced.
He probably has valid experience but little patience for things that
initially look pasted together. Fortunately they are not.
Both you and him and the service manual could get this sucker apart and
do the necessary. Just work on your oldest one first, don>t lose the
screws and other small bits (I use clip>n>seal plastic bags), zap
circuitry with finger static, work on the carpet, have other
distractions, leave food inside or apply force in the wrong direction.
Take your time ;-)
Once you>ve done a few, then the process isn>t as duanting as it first
seems. May even make you some money one day ...
[/quote]
I give him all the jobs I can>t be bothered doing (usually dismantling printers) - he has a lot of patience (more than me anyway). For some reason he reckons they are impossible to put back together afterwards. But I>m going to have a go at proving him wrong. He>ll hate that.
--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com
They say confuscious does his crosswords with a pen. |
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Mike S.
Guest
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| Posted: Mon Oct 06, 2008 7:48 pm Post subject: Re: sci.electronics.equipment is NOT for consumer gear (was: |
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In article <6936ff7f-9071-474d-be76-22048c5d31ef@26g2000hsk.googlegroups.com>,
JeffM <jeffm_@email.com> wrote:
[quote]HiC wrote:
sci.electronics.equipment is for test gear, production equipment, etc.
http://groups.google.com/group/sci.electronics/msg/13651a897337a7a9?q=Charters+misc.industry.electronics.marketplace+Discussions+Advertisement-*-*+only-advertise+sci.electronics.equipment-Test-lab-*-*-*-*+already.available.solutions+the.rec.hierarchy+*.*.not.a.forsale.group+*-*-laboratory-*-*-*-*+zzz+Discussion
[/quote]
Fair enough. Why, then, did you cross-post this to sci.electronics.repair
and alt.video.vcr? |
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JeffM
Guest
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| Posted: Tue Oct 14, 2008 9:00 pm Post subject: Bad vendor: wangzhuan158.cn -- SPAMs Usenet |
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dsfsdfsad wrote:
[quote][SPAM]Authorized semitools distributor[SPAM]
[/quote]
List the name of the manufacturer so we can boycott them too. |
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Mark F
Guest
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| Posted: Wed Oct 29, 2008 4:54 am Post subject: Re: Democrats sexy meltdown |
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Do not click on the coolpage.biz link, do not accept any
fonts or other bullshit that popups tell you to install,
just kill the thing, including your browser, if you get a
persistent one. This will contain a trojan or something
else nasty...
No, I didn>t but a friend did...
gabrielaelvin@gmail.com wrote:
[quote]http://salo.coolpage.biz/amateur.htm read full� Natalie felt it was
only fair that I remove the gag from Bills mouth so he could answer
his loving wife and daughters probing questions. After clearing his
throat he said something that I will never forget Hillary I feel your
pain http://groups.google.com/group/sexual-meltdown http://sexual-meltdown.blogspot.com/[/quote] |
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Peter Hucker
Guest
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| Posted: Thu Oct 30, 2008 12:21 am Post subject: Re: Democrats sexy meltdown |
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Only Interenet Explorer takes trojans.
Don>t use Internet Explorer.
On Tue, 28 Oct 2008 23:54:03 -0000, Mark F <markotime@shaw.ca> wrote:
[quote]Do not click on the coolpage.biz link, do not accept any
fonts or other bullshit that popups tell you to install,
just kill the thing, including your browser, if you get a
persistent one. This will contain a trojan or something
else nasty...
No, I didn>t but a friend did...
gabrielaelvin@gmail.com wrote:
http://salo.coolpage.biz/amateur.htm read full� Natalie felt it was
only fair that I remove the gag from Bills mouth so he could answer
his loving wife and daughters probing questions. After clearing his
throat he said something that I will never forget Hillary I feel your
pain http://groups.google.com/group/sexual-meltdown http://sexual-meltdown.blogspot.com/
[/quote]
--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com
One day, shortly after having her 9th baby, the good Irish lady
ran into her parish priest. He congratulated her on the new
offspring, then said: "But isn>t having nine babies a little much?"
"Well," she said, "I don>t know why I get pregnant so often, it
must be something in the air."
"Yes," said the priest, "your legs." |
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Joel Koltner
Guest
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| Posted: Fri Oct 31, 2008 2:19 am Post subject: Re: How Does CD Player Anti Skip Work? |
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"John Tserkezis" <jt@techniciansyndrome.org.invalid> wrote in message
news:482e19bb$0$17511$afc38c87@news.optusnet.com.au...
[quote]In addition, they *might* spend a little more on the physical shock
resistance of the tray and such, but not a lot. Since adding ram is by far
easier, smaller and cheaper than the engineering that has to go into a tray
to stop jogging skips, the extra ram wins every time.
[/quote]
Yes, I>ve heard that the mechanical quality of CD player mechanisms *dropped*
significantly after the ability for the control ICs to read a bit faster than
needed and using lots of RAM buffering became common/cheap. Some of the older
CD changers for automobiles -- prior to "use lots of RAM for anti-skip" --
were quite impressive, with heavy cast frames, spring/viscious dampers, etc. |
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Joel Koltner
Guest
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| Posted: Fri Oct 31, 2008 2:21 am Post subject: Re: Sony-MHC-GNZ888D Micro Hi-Fi |
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"Ayushi Mehra" <ayushi.mehra@gmail.com> wrote in message
news:03679bd9-59ab-4ab3-869d-de745de1d472@j1g2000prb.googlegroups.com...
[quote]Sony-MHC-GNZ888D Micro Hi-Fi is a Hi Fi Audio System (output: 3300
watts)
[/quote]
Sorry, my outlets are only rated for 1875W.
Oh, wait, you>re of course lying about the true output power and spamming
Usenet. What did I expect? |
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