Kemet mil-spec cap ???

[Jim Thompson]

On Thu, 8 Apr 2004 14:13:44 +0200, "Bert"
<Mr_Bert.onzin@haal.je.weg.lycos.nl> wrote:

Hi all,


I am looking for some low cost solutions for a RFID reader that I want to
include in a design. I do not need the relative long distance reading, but a
few cm distance is OK for my allplication.
Is there any kind of chipset tha I can use for it?

I am familiar with the design of UHF circuits so I am aware of the RF
circuit problems that can arise in circuit layout

Bert

Try:

Savi Technology
615 Tasman Drive
Sunnyvale, California 94089
Phone: 408.743.8000
Fax: 408.543.8650
Hotline: 888.994.SAVI (888.994.7284)

(I did a chip design for their battery-powered tags, which have long
range

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Watson A.Name - \"Watt Su]

"ACIT" <rris@sympatico.ca> wrote in message
news:Whodc.11254$BF2.1080753@news20.bellglobal.com...

Hi

I have an analog security camera which outputs a standard NTSC/PAL
composite video signal. I need to build/find a module or components
which
will allow me to encode the video signal to mpeg2 or mpeg4, and send
the
stream over IP. I have seen some cameras with built-in web servers
or
networking, but the resolution and frame rate is too low. ( eg.
axis.com )

Any ideas on how to acomplish this?

Just take an old pentium 300 and stick it in the corner, and load the
software onto it. Have it auto start the program.

> Cheers

 

[B McDonald]

Spam report id 881537586 sent to: abuse@choiceone.net

 

[Jan Panteltje]

On a sunny day (Sun, 18 Apr 2004 09:20:33 +0100) it happened "Highland Ham"
<xygm0csz.wvkn6wh@spamisbad.com> wrote in <rSCgc.657$Gq3.274@newsfe1-win>:

Now a wind generator would be cool, there are many windmils of huge size
here,
one next to my house (100m or so), a BIG one that replaced 5 smaller
ones...
It is on the coast, and it is always windy here...
How big is that thing?
JP
==============================
As I reported in a previous message its rated capacity is only 150 Watts.
6 Blades , 900 mm diameter, max rpm approx 250 , 3 phase generator ( DC
through one and a half standard 25 Amperes bridge rectifiers)
The thing sits on a street lamp post with an extension (approx 8 metres
above ground.

Frank GM0CSZ / KN6WH
Thx, sounds good.

I have a place for such a thing, and 1 meter diameter is not much.
Will think about this a bit
JP

 

[Jan Panteltje]

On a sunny day (Mon, 19 Apr 2004 17:11:39 GMT) it happened "Roger Gt"
<not@here.net> wrote in <fLTgc.38581$Xr3.21091@newssvr29.news.prodigy.com>:

So 'savages' and 'from the east' and 'cannibals'?

Pretty much describes US in Iraq.
You <---- have to understand human.

Your recollection of history seems a bit tinted too.
Why not give the indiens (spelling?) their land back ;-)?
JP

 

[William P.N. Smith]

"ltj" <ltj@yahoo.com> wrote:

There was no load attached at the time.

Many switchers will fail to run (or trip a crowbar or other shutdown
circuit) with no load...

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Clifford Heath]

Roger Gt wrote:

The Indians would war on their Neighbors for anything they wanted.
Kill anyone who resisted and sell prisoners into slavery.

Thanks, I wondered where the USA learnt to do that.
Made a fine art of it now, haven't they?

 

[Watson A.Name \"Watt Sun]

dizzyvise wrote:

What is the special reason in this transistor?

Well, these are point contact transistors, old outdated technology.
That makes them rare, and thus worth a lot to collectors. Or worth a
lot to someone anyway, maybe just someone who wants to resell them for a
profit.

"Watson A.Name "Watt Sun - the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:c63e9n$6p6fm$1@hades.csu.net...

Looks like this lot of transistors is gonna be a high dollar item on
Ebay. Only ten yours left, tho, so get your bids in real soon. ;-)
Yeah, right....

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3809906562&category=4666&
sspagename=STRK%3AMEBWA%3AIT&rd=1

 

[Watson A.Name \"Watt Sun]

maxfoo wrote:

On Tue, 20 Apr 2004 16:25:52 GMT, "dizzyvise" <im_x00@yahoo.com> wrote:

What is the special reason in this transistor?

Someone really wants to repair their Western Electric Old Vintage Transistors
radio.

As far as I know, these have never been used for consumer electronics,
and their performance would very likely be too poor for RFs.

 

[Watson A.Name \"Watt Sun]

Anthony Matonak wrote:

Fred B. McGalliard wrote:

"Anthony Matonak" <res04ijs@verizon.net> wrote in message

I think the main point is that solar PV is a technology that
does not require massive infrastructure. It's something that
can be done on an individual and distributed basis. The big
power companies really don't have that much advantage over
individuals.


Sorry Anthony, but I think this is quite wrong. Solar PV requires a very
large infrastructure to build, and a substantial infrastructure to
maintain.


I don't know about that. Solar PV can be used in any size from digital
watches to powering hotels. [snip]

The point is not whether or not they can be used, but whether or not
they can be used economically and profitably.

 

[ltj]

Would what you described cause permanent damage?

It is rated at 0-1.67A. Does this means it is "ok" with no load?

I just realized that the enclosure might not have been grounded properly. I
had no ground when bench testing and it ran fine. Perhaps it matters out on
the floor?

thx


<William P.N. Smith> wrote in message
news:4lbb805kljjroabk5l7tqk4ebqnnrttjls@4ax.com...

"ltj" <ltj@yahoo.com> wrote:
There was no load attached at the time.

Many switchers will fail to run (or trip a crowbar or other shutdown
circuit) with no load...

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Anthony Matonak]

Watson A.Name \"Watt Sun - the Dark Remover\" wrote:

Anthony Matonak wrote:

Fred B. McGalliard wrote:
Sorry Anthony, but I think this is quite wrong. Solar PV requires a very
large infrastructure to build, and a substantial infrastructure to
maintain.

I don't know about that. Solar PV can be used in any size from digital
watches to powering hotels. [snip]

The point is not whether or not they can be used, but whether or not
they can be used economically and profitably.

Oh, if that was the point then it's already been decided. Right now,
solar PV is not economical or profitable except in niche applications
not connected to the grid. Tomorrow... who knows? It does seem to be
getting cheaper all the time.

This, of course, has nothing to do with the question of "Is the
profitable use of solar PV limited to big mega-corporations?"

If we go back a couple of articles in this thread...

KR Williams wrote:

In article <408355B0.8BCF6208@my.mailbox>, NOspam@my.mailbox
says...
KR Williams wrote:

My guess though, is that solar cells for the individual will
never become cheaper than power from the grid, since the power
company has access to the same technology and a *lot* better
financing possibilities. ...and they don't have to have the pay-
back in my lifetime.

They have access to the tech, BUT, they also have to maintain the
distribution system. ...
All this is avoided cost on home solar.

There is still a huge advantage of scale.

Some technologies simply can not be affordably implemented on a small
homeowner scale and for them to be used you need a big company or co-op.
Solar PV is not in that category. The example of a solar powered radio
shows this. It does not require huge resources to build, buy or
maintain. The basic idea is that when it comes to solar PV installations
there really isn't much advantage of scale. A huge installation will
cost only slightly less per watt as a smaller one.

Anthony

 

[William P.N. Smith]

"ltj" <ltj@yahoo.com> top-posted:

Would what you described cause permanent damage?

It is rated at 0-1.67A. Does this means it is "ok" with no load?

I just realized that the enclosure might not have been grounded properly. I
had no ground when bench testing and it ran fine. Perhaps it matters out on
the floor?

thx


William P.N. Smith> wrote in message
news:4lbb805kljjroabk5l7tqk4ebqnnrttjls@4ax.com...
"ltj" <ltj@yahoo.com> wrote:
There was no load attached at the time.

Many switchers will fail to run (or trip a crowbar or other shutdown
circuit) with no load...

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

No, and it should mean that, and grounding shouldn't make much
difference. I'd try it with a 10-ohm resistor and see if it makes any
difference...


--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Rich Webb]

On Tue, 20 Apr 2004 18:25:17 -0400, Nicholas <calypson@bellsouth.net>
wrote:

I'm not sure if I'm in the right group. If not, I'm sure someone here
can suggest a more suitable one.

At any rate, Here is my project. I am building a display for kids and
need some sort of remote trigger. The concept is based around the
children using a tethered flashlight (black light) to pick out hidden
nocturnal animals painted on the display. When the animals are found
with the light the "bushes" will open to reveal the whole image. I would
like some sort of focused always on remote trigger that will activate
only when the unit is pointed directly at the image. Point it anywhere
else and nothing happens. The kids must not have to press any buttons
other than to turn on the flash light. In addition, there would need to
be some sort of timer so the animal is only revealed for 10 seconds or
so and the system will automatically reset.

It might be easier (and cheaper) to flop this around so that the "dumb"
devices are on the animal side and one "smart" trigger device is on the
flashlight.

The simplest method (but most susceptible to false triggering) might be
to sequentially light up IR LEDs in the bushes and, as each is
energized, look at the output of a detector mounted on the flashlight.
If the detector's field of view is made sufficiently narrow, presume
that it's pointed at the bush in question and cause the trigger action.

A little more robust would be a "tell me three times" requirement. IIRC,
the simple IR LED/detector pair available at Radio Shack is not terribly
fast (or sensitive) but you should still be able to "populate" all the
animals in the display in a few hundred milliseconds.

Or, get fancy and use modulated IR pulses (like are used for the
ubiquitous remote controls) so the received data train is
self-identifying.

--
Rich Webb Norfolk, VA

 

[John S. Dyson]

In article <c64bnt$6p7li$1@hades.csu.net>,
"Watson A.Name \"Watt Sun - the Dark Remover\"" <NOSPAM@dslextreme.com> writes:

dizzyvise wrote:
What is the special reason in this transistor?

Well, these are point contact transistors, old outdated technology.
That makes them rare, and thus worth a lot to collectors. Or worth a
lot to someone anyway, maybe just someone who wants to resell them for a
profit.

At one time, I thought about purchasing some old point contact transistors

to play with -- but the benefit would have been nil. There is some
temptation, but (to me), there is more challenge in playing with
more forward looking endeavors.

However, there is still some temptation to play with some point
contacts (before my time), or get some 2n525s (AFAIR, one of the better
components when my hobby started) to remember the 'good old days.'

Then, reality grabs me again, and instead, I go back to work on
my automatic RF wideband impedance matching program (interfaces
directly or indirectly with spice like programs) for my electronics
hobby, or build another UHF TV preamp concept...

I guess for 'hobby' applications, it really doesn't make much difference
if we are playing with near-state-of-the art, antique or ancient
electronics technology -- the goal is to enjoy the hobby itself!!! .

John

 

[Sylvain Munaut]

Ghostfor wrote:

"Sylvain Munaut" <tnt_at_246tNt_dot_com@reducespam.com> schreef in bericht
news:c5ot82$29b$1@ail.sri.ucl.ac.be...

Hello,

I'd like to know where I can buy Xilinx FPGA spartan 3. I'm an end user
and only need something like 5 pieces. I'm in belgium but anyservices
that do international shipping is ok.


Thanks for any info,
Sylvain Munaut


Regio?
Bjorn

Regio ??
Is that a store or ?


Sylvain Munaut

 

These are point contact rather than junction transistors. Transistor
collectors value them because they are rare. The 2N110 is a point
contact unit that was made into the 70's because of it's common use in
industrial and millitary equipment.

Older point contact units like in this auction

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3800110452

are quite a bit rarer and chances are there are not many around. If
you think how important the semiconductor is to modern society, I
think it is a very overlooked collectible as far as collectibles go.
Take a look at what an old edison light bulb will go for now to get an
idea. You have also got to remember that most of the transistors in
the auction above were hand assembled in the lab under a microscope.
They were also VERY expensive in their time. Transistors like the
CK722 and to a lesser extent the 2N107 have a lot of nostalgic value
as the first transistor someone ever experimented with or what started
many a career as an enginneer in later life. Bottom line..people
collect everything.

Take a look at the excellent website here for more transistor history
and lots of pictures.

http://users.arczip.com/rmcgarra1/

Now go root in your junkbox!

transistorREMOVE@kcTHIS.rr.com


On Tue, 20 Apr 2004 23:02:17 GMT, maxfoo
<maxfooHeadFromButt@punkass.com> wrote:

On Tue, 20 Apr 2004 16:25:52 GMT, "dizzyvise" <im_x00@yahoo.com> wrote:

What is the special reason in this transistor?

Someone really wants to repair their Western Electric Old Vintage Transistors
radio.









Remove "HeadFromButt", before replying by email.

 

[R. H. Allen]

On Tue, 20 Apr 2004 20:50:55 GMT, "Fred B. McGalliard"
<frederick.b.mcgalliard@boeing.com> wrote:

"Jim Thompson" <thegreatone@example.com> wrote in message
news:6rma80pevilb63ecse8ls63k3r3gadtuho@4ax.com...
...
The efficiency of such a system FAR exceeds what will EVER be attained
with photo cells.

I won't take that without a bit of study. The solar cells take a scads of
energy to build, but once built run for a very long time without much
maintenance. The thermal system is mechanically more complex, requires a lot
more maintenance, is more sensitive to wind loading, and of course you are
running pretty cool so the thermal efficiency is not all that great. I would
think the solar trough is more like 20% and probably much closer to PV than
you allude. The very large focusing arrays can run a lot hotter, and may
then give you a bit better efficiency, but you are still not likely to make
much over 40% and even at that, if you add in the higher rates of "dead"
space that the big focusing arrays use, you may find the total percentage of
energy recovered per square mile to be under 20%. The cost per KWH recovered
is, I think, the killer here, and the increased maintenance adds a lot to
this cost for the thermal array.

Not to mention that such systems are not practical outside of regions
with lots of clear sky. Light diffusion caused by cloud cover prevents
the thermal system from focusing the sunlight on the receiver.

 

[Richard Henry]

"Roger Gt" <not@here.net> wrote in message
news:6Mqhc.53755$TJ3.46994@newssvr25.news.prodigy.com...

X-No-Archive: yes
"Roger Gt" wrote
: "Richard Henry" wrote
: : "Roger Gt" wrote
: : > "Richard Henry" wrote
: : > : "Roger Gt" wrote
: : > : > "maxfoo" wrote
: : > : > : "Roger Gt" wrote
: : > <snip
: : > : > Nope... But when D.D. Eisenhower was president he
: declared
: : > : > martial law and cleared out the majority of the
Illegals.
: I
: : > : > can't see why that wouldn't work again.
: : > : Martial law? I must have missed that.
: : > Well gee, what were you doing in 1956-1960? Didn't you
vote?
: : In 1960, I turned 13, so no voting for me then.
: : I don't recall any martial law, either. Can you be more
: specific?
:
: I remember the announcement, I was in the Army at the time and
: thought it was going to send me to a new assignment (it Didn't).
: But I haven't seen anything about it a long time. Perhaps it
was
: the threat of marshal law that sent many thousands of illegal
: aliens home. Whatever it worked! There were complaints about
: the lost farm labor and a guest worker program was set up.
:
: I'll research it and get back to you with some references.....
:
Well Ike did use Martial law, but not for aliens!

Still no reference?

 

[Fred B. McGalliard]

"Clifford Heath" <cjh-nospam@nospaManagesoft.com> wrote in message
news:1082502964.907583@excalibur.osa.com.au...

Roger Gt wrote:
The Indians would war on their Neighbors for anything they wanted.
Kill anyone who resisted and sell prisoners into slavery.

Thanks, I wondered where the USA learnt to do that.
Made a fine art of it now, haven't they?

I wish. If they are making a profit in war, why is our debt load increasing
so fast?