Driver to drive?

[John Larkin]

On 10 Jan 2005 11:51:44 -0800, "ray13" <ray_psi@yahoo.com> wrote:

http://bizns.nikkeibp.co.jp/cgi-bin/asia/nsh_id_con.pl?NSH_KIJIID=315791&NSH_CHTML=asiabiztech.html

That is the link to the company's press release, yes? Does it say they
have a working cell, no? Is it 100% methanol, yes? The time has come to
look this technology in the face and except it for what it is, the real
McCoy.

Or stay in denial, like the people I know that won't upgrade from
Windoz 3.11.

Denial? When the stuff actually works, and isn't the perennial
prototype or mockup, and you can actually buy it at Circuit City...
*that's* when it will have arrived.

Just the legal implications of liquid 100% alcohol fuel in phones and
laptops should be interesting. Methanol is toxic, too.

John

 

[smpowell]

The reverse voltage is normally between 1.33 and 1.50 VDC. The
diode is connected to a high resistance voltage divider that only
has 3 uA going through it. Its only function is to protect a
comparator (TS3V393C) from having a negative voltage applied
to it's inputs under non-operating conditions.

In that circuit, I see no need for the diode. The current is strictly
limited, and the comparator surely has its own input protection.
Why do you believe more is necessary? Is there an exremely
high voltage on the other end of that 100M resistor?

The other end is connected to a capacitor at -300 VDC, the other end
is connected to Vcc which is normally at +4-6 VDC, except if the
battery is disconnected while the flash's capacitor is still charged,
in which case, the -300 VDC is going to force the 3 uA into something.

My guess is that the Vcc rail would go negative with respect to ground;
as to whether the IC would withstand having 3 uA forced through it the
wrong way I don't have clue.

Could some familiar with the inner workings of the TS393C care to
speculate about this?

Hmm, would putting a reverse diode between Vcc & ground suffice?

(Keep in mind that I learned most of my what I know about
electronics from Forest Mims's books!)

 

[John Woodgate]

I read in sci.electronics.design that Ian Stirling
<root@mauve.demon.co.uk> wrote (in <41e2eb3b$0$71950$ed2e19e4@ptn-nntp-
reader04.plus.net&gt about 'CNN's top 25 innovations', on Mon, 10 Jan
2005:

There was little
innovative about HTML.

Wordwise, the most popular word-processor for the BBC Micro, used a
similar 'tag' system to HTML, to do primitive formatting and to pass
control codes to the dot-matrix printer, and I don't suppose that
Wordwise was the first app to do so.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[John Fields]

On Mon, 10 Jan 2005 16:17:35 -0800, "Mike Fields"
<spam_me_not_mr.gadget2@comcast.net> wrote:

Windoze 3.11 is out ??? Wow -- I still have (I think) my windoze 2.0
floppies in a box somewhere ... if I run across them, I may send them
to the Smithsonian ;-)

---
Why? What have they ever done to you?^)

--
John Fields

 

[Don Lancaster]

Don Lancaster wrote:

There's a sneaky trick that lets you individually control 56 LED's from
one 8-bit port with ZERO external hardware.

See http://www.tinaja.com/glib/muse153.pdf for details.

--
Many thanks,

Don Lancaster

And, if you are only going to light a few of the LED's at once, you can
individually control 132 LED's from 12 port lines or 240 LED's from 16
port lines.

Again, with ZERO external hardware.

--
Many thanks,

Don Lancaster
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
voice: (928)428-4073 email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com

 

[David Lesher]

"Dan" <danNOSPAMsteely2001@yahoo.com> writes:

I was thinking about buying an HID lighting ballast which consists of a
transformer and a couple caps and putting it in its own metal box with
cooling vents, plug with strain relief and a handle and then reselling it on
ebay for a profit. The only problem is its not UL approved. How long could I
do this before getting into trouble?

http://www.1000bulbs.com/category.php?category=122

Doesn't anyone make a high efficiency electronic ballast?


--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

 

[Rhyanon]

Look, I yanked the dweebs into replying again, bahahahahahha!!! What
fuckless mow - rons.....

"John Fields" <jfields@austininstruments.com> wrote in message
news:d6t0u0h90knnn87r1f87tig2m3am6gjoq0@4ax.com...

On Sat, 8 Jan 2005 08:11:34 -0600, "Rhyanon" <pissoff@uberbitch.com
wrote:

Hah, I am mightee.

---
Mightee fucking stupid...

--
John Fields

 

[Rhyanon]

I *am* pleased to be crossposting, thanks, chump.

"Randy McLaughlin" <randy@nospam.com> wrote in message
news:%w_Dd.1998$vM4.1854@bignews3.bellsouth.net...

"John Fields" <jfields@austininstruments.com> wrote in message
news:d6t0u0h90knnn87r1f87tig2m3am6gjoq0@4ax.com...
On Sat, 8 Jan 2005 08:11:34 -0600, "Rhyanon" <pissoff@uberbitch.com
wrote:

Hah, I am mightee.

---
Mightee fucking stupid...

--
John Fields

Please to cross posting.


Randy

 

[Rhyanon]

Oooooooooooh, what rapier wit! I am utterly nonplussed.

"John Fields" <jfields@austininstruments.com> wrote in message
news:knt0u0555njn598d5345sr6lfiukgdhpue@4ax.com...

On Fri, 7 Jan 2005 22:08:49 -0600, "Rhyanon" <pissoff@uberbitch.com
wrote:

Tough shit. Go cower in your killfile blankie with your equally balless
friends.

---
Hang it in your ass, you witless twat.
And don't top post.
--
John Fields

 

[Rhyanon]

Wow! You sure fixed us! You fucking idiot.

"Pig Bladder" <pigbladder@neodruid.net> wrote in message
newsan.2005.01.08.22.19.02.380454@neodruid.net...

On Fri, 07 Jan 2005 22:09:35 -0600, Rhyanon wrote:

My gawds, you're boring.

So are you.

So I've trimmed the crosspost, finally.
--
The Pig Bladder From Uranus, Still Waiting for
Some Hot Babe to Ask What My Favorite Planet Is.

 

[Randy McLaughlin]

"Rhyanon" <pissoff@uberbitch.com> wrote in message
news:10u6kn1hudl3s35@corp.supernews.com...
<snip>

Please don't cross-post.

Randy

 

[R]

calcerise@hotmail.com wrote in news:1105418222.089503.72700
@c13g2000cwb.googlegroups.com:

In short, PC-based test sucks for hobbyists, technicians, and
educators. It's probably OK for ATE installations, usually they go with
the aforementioned PXI or VXI for good measure and inflate the budget
anyway.

Please tell that to Sound Technology and Audio Precision.
www.soundtechnology.com
www.audioprecision.com

http://audioprecision.com/index.php?page=products&id=1000000123 shows a
picture of their PCI card which you so clearly disdain.

r

 

[Mr. T]

<calcerise@hotmail.com> wrote in message
news:1105418222.089503.72700@c13g2000cwb.googlegroups.com...

Just as Jack Mormons are untempleworthy and aircraft can be
unairworthy, a PC is unbenchworthy when used as a source or a
demodulator of audio for test and measurement purposes.

For one thing, the drives and power and reset buttons are on the front
whereas the sound card, usually the I/O in this application, is either
a PCI card in the back or on the motherboard.

I have many bench instruments with connections at the back too, don't you?

The input and output are by a couple of sub-mini phono jacks.

Only for toy grade, even then they can be replaced.

This alone makes it unbenchworthy. But these problems can be addressed
by DIY measures.

Yes.

The fact is that others, however, cannot.

True, some may even matter.

The PC has a low-priced, noisy switchmode supply and a usually total
lack of RF shielding internally. While not audible, the noise level can
and will be induced in cabling to the DUT, the DUT itself, and
everywhere else.

Not will, MAY. As in all cases.

The PC soundcard is an entertainment grade, AC-coupled, single ended
affair. PCI cards with more sophisticated, instrument grade design do
exist-however they are often quite expensive. Serious cards designed
for legit T&M work, usually CompactPCI, PXI, or VME/VXI, are
astonishingly expensive. As are their host backplanes, enclosures, and
CPU cards (although old VMEbus stuff can usually be found and the
appropriate software compiled for the OS you wind up running.)

And yet a Lynx soundcard in a suitable PC, with suitable software, is pretty
close to test equipment costing tens or hundreds of times as much.
(When used within it's designed range of course.)

There are PC PCI oscilloscopes, spectrum analyzers, and arbs which
provide their own shielded and filtered micro-environment, but not only
they no cheaper than a standalone piece of test equipment, the host PC
still has all of the above disadvantages.

But the advantage of direct data aquisition combined with a high level of
computing power and display/print/network abilities.

In short, PC-based test sucks for hobbyists, technicians, and
educators. It's probably OK for ATE installations, usually they go with
the aforementioned PXI or VXI for good measure and inflate the budget
anyway.

One always has a choice. Often many choices, depending on budget.
Pretty handy eh?

MrT.

 

[Ken Smith]

In article <HtednaqjO5pbkX7cRVn-rA@comcast.com>,
Robert Monsen <rcsurname@comcast.net> wrote:
[...]

He also mentions JFET devices, in particular the 2N4117A and PN4117A,
which apparently have very small junctions, leading to even lower
leakage of typical 0.1pA, and guaranteed 1pA max.

You can get "low leakage diodes" that are in fact JFET die in a two lead
package.

--
--
kensmith@rahul.net forging knowledge

 

[Ian Stirling]

John Woodgate <jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that Ian Stirling
root@mauve.demon.co.uk> wrote (in <41e2eb3b$0$71950$ed2e19e4@ptn-nntp-
reader04.plus.net&gt about 'CNN's top 25 innovations', on Mon, 10 Jan
2005:
There was little
innovative about HTML.

Wordwise, the most popular word-processor for the BBC Micro, used a
similar 'tag' system to HTML, to do primitive formatting and to pass
control codes to the dot-matrix printer, and I don't suppose that
Wordwise was the first app to do so.

Tex comes to mind, which was written in 1978, there may well be earlier ones.
Markup languages were old hat by the time HTML came along.

 

[Andrew VK3BFA]

Mr. T wrote:

calcerise@hotmail.com> wrote in message
news:1105418222.089503.72700@c13g2000cwb.googlegroups.com...
Just as Jack Mormons are untempleworthy and aircraft can be
unairworthy, a PC is unbenchworthy when used as a source or a
demodulator of audio for test and measurement purposes.

For one thing, the drives and power and reset buttons are on the
front
whereas the sound card, usually the I/O in this application, is
either
a PCI card in the back or on the motherboard.

I have many bench instruments with connections at the back too, don't
you?

The input and output are by a couple of sub-mini phono jacks.

Only for toy grade, even then they can be replaced.

This alone makes it unbenchworthy. But these problems can be
addressed
by DIY measures.

Yes.

The fact is that others, however, cannot.

True, some may even matter.

The PC has a low-priced, noisy switchmode supply and a usually
total
lack of RF shielding internally. While not audible, the noise level
can
and will be induced in cabling to the DUT, the DUT itself, and
everywhere else.

Not will, MAY. As in all cases.

The PC soundcard is an entertainment grade, AC-coupled, single
ended
affair. PCI cards with more sophisticated, instrument grade design
do
exist-however they are often quite expensive. Serious cards
designed
for legit T&M work, usually CompactPCI, PXI, or VME/VXI, are
astonishingly expensive. As are their host backplanes, enclosures,
and
CPU cards (although old VMEbus stuff can usually be found and the
appropriate software compiled for the OS you wind up running.)

And yet a Lynx soundcard in a suitable PC, with suitable software, is
pretty
close to test equipment costing tens or hundreds of times as much.
(When used within it's designed range of course.)

There are PC PCI oscilloscopes, spectrum analyzers, and arbs which
provide their own shielded and filtered micro-environment, but not
only
they no cheaper than a standalone piece of test equipment, the host
PC
still has all of the above disadvantages.

But the advantage of direct data aquisition combined with a high
level of
computing power and display/print/network abilities.

In short, PC-based test sucks for hobbyists, technicians, and
educators. It's probably OK for ATE installations, usually they go
with
the aforementioned PXI or VXI for good measure and inflate the
budget
anyway.

One always has a choice. Often many choices, depending on budget.
Pretty handy eh?

MrT.

OK, being but a humble tech I am getting confused - looked at the
glossy websites mentioned, sounds great - and, cause its on the
internet, it must be true - eh?

And if you use a PC based (whatever) for test/measurement, for a $35
soundcard, free software, you get pretty impressive results - ie, you
can SEE whats going on within the bandwidth limits of the soundcard-
pretty cool.

And most of my "sophisticated" test gear is old, and out of calibration
- thats when its werking and doesnt need "routine maintenance" - would
love a new 100Mhz Tek cro, but no way - the electricity bill comes
first.

So, any chance of a tutorial on this subject rather than claim and
counterclaim - its OK for you engineers, but some of the rest of us
just get bloody confused....

73 de VK3BFA Anderw

 

LOL. Yes, the dotted line should be below the solid one unless you're
in Oz....

I wish the people who dreamt up all these marvellous standards would
include a symbol that tells you if a supply is regulated or not
without taking it apart.
I just bought a batch of 10 used 18" tft displays (Ł7 or $11 each! )
and need to obtain/make cheap 24V 2.5A power supplies for the working
ones. I think they'll end up costing more than the displays....
Mark

 

Maybe the secretary of IEC SC3C should make his dictats easily
findable and easily readable on search engines or he'll just get
ignored...
I haven't even come across an electronics book that actually tells you
what that symbol really means.
M.K.

 

Thanks to you and all others for their replies.
Mark

 

[Arny Krueger]

"Andrew VK3BFA" <ablight@alphalink.com.au> wrote in message
news:1105439112.590147.70290@f14g2000cwb.googlegroups.com

And if you use a PC based (whatever) for test/measurement, for a $35
soundcard, free software, you get pretty impressive results - ie, you
can SEE whats going on within the bandwidth limits of the soundcard-
pretty cool.

And most of my "sophisticated" test gear is old, and out of calibration
- thats when its werking and doesnt need "routine maintenance" - would
love a new 100Mhz Tek cro, but no way - the electricity bill comes
first.

So, any chance of a tutorial on this subject rather than claim and
counterclaim - its OK for you engineers, but some of the rest of us
just get bloody confused....

www.pcavtech.com is a web site based on measurements based on computer sound
cards.

www.pcabx.com is a web site based on listening tests set up and auditioned
using computer sound cards.