magnetic field

JeffM wrote:

[sources of information useful for electronics and electronics
design]
jason @ eg3.com

Were those all meant to be links?
NT (bigcat@meeow.co.uk)

They haven't been the other 200 times he's posted it:

http://groups.google.ca/groups?&threadm=sci/electronics-search-faq_1114144353@rtfm.mit.edu

shame, as it appears to make the list pointless.

NT

 

[Glenn Gundlach]

Dain bramage perhaps?
GG

 

[David Mahon]

In article <176uZD2KcidF-pn2-PdFBQGemsSi4@rikki.tavi.co.uk>, Bob Eager
<rde42@spamcop.net> writes

On Sat, 16 Jul 2005 15:50:08 UTC, David Mahon <news@amigo.co.uk> wrote:

When you do come to replace yours, look at:

http://www.upsbattery.co.uk/ (owned by the following)
http://www.mdsbattery.co.uk/

rather than directly at APC - who charge 2-3 times more for the same
cells in their RBC6 kit. This could still have happened even if I'd paid
the 120 pounds directly to APC.

I replaced two RBC7s this year, and got them for a good deal less than
the 170 pounds quoted by APC. I paid 123.00 delivered, although as you
say they might well fail the same way anyway.

My supplier is doing RBC6 for 111.96 delivered, all inclusive.

That seems a bit much for an RBC6 (not much less than APC who want
119.99 excluding vat and delivery).

39.29 + delivery (9.40) and VAT at the site I mentioned for an RBC6. An
RBC7 is 79.41

--
David Mahon

 

[Fester Bestertester]

On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

 

In sci.physics Fester Bestertester <fbt@fbt.net> wrote:

On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

It is going to depend on the sensor.

Eyeballs are non-contact sensors, try staring at the sun.


--
Jim Pennino

Remove .spam.sux to reply.

 

[Rich Grise]

On Fri, 14 Aug 2009 18:15:02 +0000, jimp wrote:

In sci.physics Fester Bestertester <fbt@fbt.net> wrote:
On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

It is going to depend on the sensor.

Eyeballs are non-contact sensors, try staring at the sun.

Your eyeballs have lenses, which focus the light/radiation onto a very
small spot on the retina - haven't you ever lit a piece of paper (or
ants!) on fire using a magnifying glass?

Do IR pyrometers have that kind of focus?

Thanks,
Rich

 

In sci.physics Rich Grise <richgrise@example.net> wrote:

On Fri, 14 Aug 2009 18:15:02 +0000, jimp wrote:
In sci.physics Fester Bestertester <fbt@fbt.net> wrote:
On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

It is going to depend on the sensor.

Eyeballs are non-contact sensors, try staring at the sun.

Your eyeballs have lenses, which focus the light/radiation onto a very
small spot on the retina - haven't you ever lit a piece of paper (or
ants!) on fire using a magnifying glass?

Do IR pyrometers have that kind of focus?

Thanks,
Rich

Like I said, it depends.

Most instruments have a lens system.

http://www.wintron.com/infrared/irproducts.htm

http://www.processsensorsir.com/index.html?gclid=CKX75NDyo5wCFSYoawodR1iUjw

http://www.thermoworks.com/products/ir/index.html?gclid=COr66NLyo5wCFRxNagodJj2Sjw


--
Jim Pennino

Remove .spam.sux to reply.

 

[Michael A. Terrell]

Fester Bestertester wrote:

On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

Think about it. Its easier than you think.


--
You can't have a sense of humor, if you have no sense!

 

[Gone Fishin]

On Wed, 12 Aug 2009 17:11:02 -0700, life imitates life wrote
(in article <3el6859itotge5n6vmjpo6t28dsgj9vl4n@4ax.com&gt:

The unit will usually switch to "off scale" indicator of some kind.
With a voltmeter, it is like "OV" for overvoltage. OT would be over temp,
but not all that intuitive, so it would probably flash off scale or
something.

You win the booby prize ("You may now choose your booby."). The display says
"OL" when the stovetop coil exceeds 500f.

So the limitation is in firmware. Damn!

Thanks for all who contributed.

 

[DarkSucker]

On Fri, 14 Aug 2009 10:29:56 -0700, Fester Bestertester <fbt@fbt.net>
wrote:

On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

The resistor bolometer has limits to what IR it can be exposed to.

Did you even read the instructions?

There IS "contact". It is just that some of you are too stupid to get
the fact that light also has the potential to move matter.

It is a hard to miss fact for some of us. For some of you, however,
setting your alarm clock poses difficulties.

Yes, LIGHT IMPINGES on the sensor, idiot.

 

[Mycelium]

On Fri, 14 Aug 2009 19:24:46 GMT, Rich Grise <richgrise@example.net>
wrote:

On Fri, 14 Aug 2009 18:15:02 +0000, jimp wrote:
In sci.physics Fester Bestertester <fbt@fbt.net> wrote:
On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

It is going to depend on the sensor.

Eyeballs are non-contact sensors, try staring at the sun.

Your eyeballs have lenses, which focus the light/radiation onto a very
small spot on the retina - haven't you ever lit a piece of paper (or
ants!) on fire using a magnifying glass?

Do IR pyrometers have that kind of focus?

Thanks,
Rich

Pure optics. Take the field of view. Say you are looking at a 6 inch
spot.

That spot is focused down to what is typically a 2 mm resistor
bolometer sense element. It usually sits a couple mm down in the
"transistor can" under a germanium window or other such IR window media.

That 2mm spot has the entire "image" cast upon it. It is exactly like
when you put a pinhole in a box and look at the sun on the back wall of
the box. That image of the sun is a perfect casting of the actual image.

Same with IR. Instead of a CCD of whatever size like with video, the
resistor bolometer is only 2 mm square.

Just do not point your IR meter toward the sun. It will fry the sense
element.

 

[Mycelium]

On Fri, 14 Aug 2009 19:45:02 GMT, jimp@specsol.spam.sux.com wrote:

In sci.physics Rich Grise <richgrise@example.net> wrote:
On Fri, 14 Aug 2009 18:15:02 +0000, jimp wrote:
In sci.physics Fester Bestertester <fbt@fbt.net> wrote:
On Fri, 14 Aug 2009 02:46:19 -0700, Michael A. Terrell wrote
(in article <4A85326B.1A3672B4@earthlink.net&gt:

More important, what temperature destroys the sensor?

These are *non-contact* sensors. How can pointing it at an IR source from a
distance damage it?

It is going to depend on the sensor.

Eyeballs are non-contact sensors, try staring at the sun.

Your eyeballs have lenses, which focus the light/radiation onto a very
small spot on the retina - haven't you ever lit a piece of paper (or
ants!) on fire using a magnifying glass?

Do IR pyrometers have that kind of focus?

Thanks,
Rich

Like I said, it depends.

Most instruments have a lens system.

Actually, the best instruments go straight from the primary mirror to
the sense element.

IR video has a lens system, and cheap IR has a fresnel <sp>, but most
radiate directly onto the sensor.

Most are set up like a reflector telescope.

Lens systems cut energy, raising the noise floor.

 

[life imitates life]

On Fri, 14 Aug 2009 15:09:51 -0700, Gone Fishin' <gone@fishin.net> wrote:

On Wed, 12 Aug 2009 17:11:02 -0700, life imitates life wrote
(in article <3el6859itotge5n6vmjpo6t28dsgj9vl4n@4ax.com&gt:

The unit will usually switch to "off scale" indicator of some kind.
With a voltmeter, it is like "OV" for overvoltage. OT would be over temp,
but not all that intuitive, so it would probably flash off scale or
something.

You win the booby prize ("You may now choose your booby."). The display says
"OL" when the stovetop coil exceeds 500f.

So the limitation is in firmware. Damn!

Thanks for all who contributed.

Better not tell anyone here. It will ruin their claims that I am never
correct. Won't be the first time.

If you want to know who to filter, just filter all of the idiots that
mouth off at this post.

 

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[nobodyhere@thisplace.com]

You might consider picking up a router. You'll
connect the single modem you have to the router,
then the router will connect both the computer and
internet radio. But, take a look at the ip address
that your computer thinks it has, (Start -> Run ->
type in CMD click ok.. in the black box type IPCONFIG.
If your IP ADDRESS is a 192.168.x.x or 10.x.x.x then
you are already behind a router that may be built into the
modem.... in that case you'll just need a 10/100 hub
to connect both the computer and radio to the internet.
This is basic home networking.

Most modems will require a power down and power up
in order to talk to a router.

I have a phone line that enters at one end of a
house and has a double plate for the usual 2 phone
connections in the room. I want to locate an
Internet radio near that plate and to have a DSL
connection there for that radio. In the next room,
about 16' away from the same radio, I have a
computer and I want it to use the DSL also.

An RJ45 Ethernet cable (usually about 4' to 5' in
length) is needed to connect the DSL modem to the
radio or to the computer. Is there a wiring
scheme that will work with one modem or are two
modems needed?

Thanks for the help.

--
--------------------------------- --- -- -
Posted with NewsLeecher v3.8 Final
Web @ http://www.newsleecher.com/?usenet
------------------- ----- ---- -- -

 

[JD]

Thaaank you SomebodyHere :--)

nobodyhere@thisplace.com wrote:

You might consider picking up a router. You'll
connect the single modem you have to the router,
then the router will connect both the computer and
internet radio. But, take a look at the ip address
that your computer thinks it has, (Start -> Run -
type in CMD click ok.. in the black box type IPCONFIG.
If your IP ADDRESS is a 192.168.x.x or 10.x.x.x then

Yes, I have the 192.168.......

you are already behind a router that may be built into the
modem.... in that case you'll just need a 10/100 hub
to connect both the computer and radio to the internet.
This is basic home networking.

I prefer wired to wireless in routers. Could a
second DSL modem be used?
If not then, a wired router would be my choice. I
already use a firewall,
so would another one be needed?

Most modems will require a power down and power up
in order to talk to a router.

I could probably handle that. You'll probably hear
a lot of screaming
if it doesn't work for me. ;-)

Thanks for your help.

I have a phone line that enters at one end of a
house and has a double plate for the usual 2 phone
connections in the room. I want to locate an
Internet radio near that plate and to have a DSL
connection there for that radio. In the next room,
about 16' away from the same radio, I have a
computer and I want it to use the DSL also.

An RJ45 Ethernet cable (usually about 4' to 5' in
length) is needed to connect the DSL modem to the
radio or to the computer. Is there a wiring
scheme that will work with one modem or are two
modems needed?

Thanks for the help.


--
--------------------------------- --- -- -
Posted with NewsLeecher v3.8 Final
Web @ http://www.newsleecher.com/?usenet
------------------- ----- ---- -- -

 

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[Wiblur the Reviewer]

Si werg-tion; kau eree sa bis bara
AW,--Ikaw mayou dol wlangga gid
COF y bywedd OFRY? Ond swn, ga 14,
eillo ll on og mut fyr fy
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eimis war fung PURPOSTARTH. Menodd
ung kasa si nanga singhiong konsep
I highead samilan haga usĂĄlraton
fu co" ni ynt fanahau alaw, ik sa
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sa aro Gutiadga orri Hal Dy bythi
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kallywhe ugoedela.

PUSAHON Cyn?

 

[krw@att.bizzzzzzzzzzzz]

On Wed, 15 Sep 2010 15:57:16 -0700 (PDT), den <den@densnet.com> wrote:

On Sep 15, 1:39 pm, I AM PROTEUS <proteus...@gmail.com> wrote:
On Sep 15, 3:40 pm, den <d...@densnet.com> wrote:

Ignore the village idiot named below.

I AM PROTEUS

THAT WOULD BE YOU DENTRITE

YOU HAVE ALL BECOME IDIOTS

YOUR RESPONSES TO POSTS WOULD BE FUNNY IF THIS WAS A COMEDIC VENUE
BUT INSTEAD THEY ARE PATHETIC AND AMATUER LIKE

YOU WOULD BENEFIT FROM DISPLAYING SOME RESPECT

IAP

Respect what?
According to your profile you are an asshole no matter which newsgroup
you crap in.
Dave sparkyguy442 (the yahoo place) asked a simple question, and it
is possible that someone in this group can help him. That is (by the
way) what this group is about. Helping each other, NOT having to skip
past your self worshiping drooling drivel. Crawl back under your slimy
rock. Nobody will miss you. Trust me on this. This nation was built
on lab rats who kept on asking questions until answers were
discovered. What nation do you germinate in?

Make everyone happy and killfile the troll. All you're doing is playing into
his needs, and short-circuiting everyone else's killfile.

 

[JW]

On Tue, 19 Oct 2010 23:27:40 -0700 (PDT) world-trade <jiazhao34@yahoo.com>
wrote in Message id:
<9555e6d5-a797-4389-b001-b02fca0eab77@w30g2000prj.googlegroups.com>:

Nuke Googlegroups.