Driver to drive?

[Daniel J Beardsall]

One of the fellows working for me designed this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3856393230

It's a simple product, but any comments on the design of it
would be most appreciated.

Looks fantastic. If it were available in the UK I'd consider getting one.

DjBx

 

[Jerry Avins]

Guy Macon wrote:

...

An open letter to the internet from Trolls United Against Defamation:

...

Con-troll yourself! What kind of acronym is TUAD?

Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

 

[Klaus Vestergaard Kragelu]

"Dmitri(Cabling-Design.com)" <info_at_cabling-design_dot_com@foo.com> wrote
in message news:tRTqd.3839865$yk.587209@news.easynews.com...

How do you guys keep track of your parts?

I programmed a VB application some years back to allow for searching for a
part. Output is a number and that number is found on the drawer og box

Advantage back then of this system was that I added number of parts in each
drawer and when I have done a project in my layout program (Protel), I just
export the BOM and the application automagically decreases the part counts
in the relevant positions accordingly

Well, it took 5 days to program, so perhaps today I actually have gained
time using it

Cheers

Klaus

 

[Guy Macon]

Arie de Muynck wrote:

Guy Macon <_see.web.page_@_www.guymacon.com_> ...

Most telegraphs had a different system: a battery on each end.
This resulted in negative ground at one end and positive ground
at the other end, and ground halfway between positive and negative
somewhere in-between.

Only during signals - a low percentage of the time, I assume. And a floating
line in the meantime.

The line would be the voltage of the battery at the recieving end.
This wouldn't matter because telegraphs are current-operated.

 

[Guy Macon]

Daniel J Beardsall wrote:

One of the fellows working for me designed this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3856393230

It's a simple product, but any comments on the design of it
would be most appreciated.

Looks fantastic. If it were available in the UK I'd consider getting one.

I would be glad to send you one with the same free-shipping offer.
I just listed another one that accepts UK and Canada orders.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3857675357

I was starting off US-only while I put together my shipping
procedures, but that came together quite smoothly so this is
a good time to add international shipping.

 

[Jim Meyer]

"Tam/WB2TT" <t-tammaru@c0mca$t.net> wrote in message news:<T-adnX7HdrsuvDLcRVn-gw@comcast.com>...

"Ban" <bansuri@web.de> wrote in message

Mark, be aware that you not only measure the DUT, but at the same time the
effect of the input current of your voltmeter. Try to find out what comes
from what and if with these values the whole thing really makes sense to
measure.
--
ciao Ban
Bordighera, Italy

I ran into that. Tried to measure the voltage drop of a 1N914 which feeds
backup 4.5 V to a small CMOS RAM. The current drawn by the RAM is the same
order of magnitude as the current drawn by the DVM (10 M input?). Best I
could come up with is "somewhere" around 300 mV.

Tam

The characteristic curves for a 1N914 show that 300 mV drop will
result from 2 uA of current. A 10 meg input DVM will be passing about
0.03 uA at 300 mV so the meter current is only 1.5% of the RAM
current.

Jim

 

[Rene Tschaggelar]

Apparently an excellent idea of the canadians to protect
their food industry. Such hassles sooner or later lead
to the sending of food vouchers.

Rene

Greg Neff wrote:

I have made a point of staying out of S.E.D. political discussions,
but I am now truly astonished.

Two days ago I took a Christmas parcel to Canada Post to mail to my
Snowbird parents in Florida. I was asked "Is there any food in
there?" To which I replied "Sure, there is some candy." I was then
dutifully informed that, as of August of this year, in order to send
the nuts and licorice I must first submit a formal prior notice to the
US FDA, who in turn will provide an authorization number, which must
then be entered on a Canada Post CN22 form, that would then have to be
affixed to the parcel, visible for inspection by US Customs. Then and
only then will Canada Post accept the parcel.

At that point I was looking around for Allen Funt, but this was indeed
no joke.
[snip]

 

[Rich Grise]

On Thu, 02 Dec 2004 15:31:13 -0600, John Fields wrote:

On Thu, 02 Dec 2004 17:58:54 GMT, "Ban" <bansuri@web.de> wrote:
John Fields wrote:
On Thu, 2 Dec 2004 09:08:03 -0500, "Tam/WB2TT" <t-tammaru@c0mca$t.net

the drop across the diode will be _precisely_ E1 - E2.

The offset current of the meter will still influence the result, but when
you swap the meter connections and note down the different values you
might compensate for that too.

---
What offset current? If you're thinking about a d'Arsonval movement, when
E2 = E3 there'll be no current flowing through the meter, so it'll vanish
as far as the circuit is concerned. Same thing for a digital meter.
Think about it... all of the bias and offset currents for the front end
are supplied by its own internal supply when it's not connected to
anything and it's reading zero, so why should current need to flow across
the inputs when they're both connected to the same voltage? And,
essentially, shorted together.

Perhaps this would have been better:

+4.5
|
+--------+-------+---->E1
| |
[1N914] [R1]
| |
E3<--+---[ľA METER]---+---->E2
| |
[RAM] [R2]
| |
+--------+-------+
|
0V

Nah - that's _WAY_ too sensitive! ;-)

Cheers!
Rich

 

[Rich Grise]

On Thu, 02 Dec 2004 14:46:00 -0500, Jerry Avins wrote:

Guy Macon wrote:

...

An open letter to the internet from Trolls United Against Defamation:

...

Con-troll yourself! What kind of acronym is TUAD?

Maconese. ;-)

He couldn't decide between "Trolls Organized Against Defamation" or
"Trolls United Rejecting Defamation"

Cheers!
Rich

 

[Genome]

"David Lesher" <wb8foz@panix.com> wrote in message
news:coooqv$s9g$1@reader1.panix.com...

I hang out with a bunch of network admins [they let me post to their
list if I don't talk BGP...] and one (and likely most...) are seeking
a environmental sensor:

They just want to know when the AC has quit, or the humidity is WAY too
low.

The lights go out.

The sandwiches curl up at the edges.

DNA

Next week, Advanced orgasms for lesbiens.

 

[Tom Woodrow]

Send a See's gift certificate next year.

Tom Woodrow

Greg Neff wrote:

I have made a point of staying out of S.E.D. political discussions,
but I am now truly astonished.

Two days ago I took a Christmas parcel to Canada Post to mail to my
Snowbird parents in Florida. I was asked "Is there any food in
there?" To which I replied "Sure, there is some candy." I was then
dutifully informed that, as of August of this year, in order to send
the nuts and licorice I must first submit a formal prior notice to the
US FDA, who in turn will provide an authorization number, which must
then be entered on a Canada Post CN22 form, that would then have to be
affixed to the parcel, visible for inspection by US Customs. Then and
only then will Canada Post accept the parcel.

At that point I was looking around for Allen Funt, but this was indeed
no joke.

The Canada Post T455293 (04-06) information slip handed to me has two
URLs on it, one of which is broken. This is the one that worked:

http://www.fda.gov/oc/bioterrorism/bioact.html

So then, just because I was severely annoyed by all of this, I
actually went through the process of setting up an account with the
FDA, and going through the grind of obtaining the authorization. I
took me over an hour to figure it all out and get through it.

As part of the prior notification process you have to build 7-digit
alphanumeric codes that describe each item you are sending. I guess
the FDA has never heard of UPC numbers. In any case, the alphanumeric
code describes what the item is, how it may have been processed, and
how it is packaged. Does anyone on the face of this earth truly
believe that a terrorist would actually truthfully follow these
processes? The incredibly ironic thing is that it is impossible for a
terrorist to honestly build a product code for tampered food, since
there are no codes for foods that are poisoned, biohazards or
radioactive. A terrorist couldn't tell the truth filling out the form
even if he or she wanted to. So the point of all this incredibly
onerous and expensive bureaucracy is?

Ho Ho Ho. Just a splash of eggnog in my rum, please...

================================

Greg Neff
VP Engineering
*Microsym* Computers Inc.
greg@guesswhichwordgoeshere.com

 

[Jonathan Kirwan]

On 30 Nov 2004 18:27:36 -0800, Winfield Hill
<hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:

Jonathan Kirwan wrote...

If you want me to post the rest of the Appendix on basewidth modulation,
I'll be happy to do so. It's from "Modeling the Bipolar Transistor,"
by Ian Getreu (when he was working at Tektronix and probably with their
STS (semiconductor test systems) group when it still existed.)

Yes please, or a link if it exists.

I've a strong hunch you aren't reading this thread any further, Win. If you
are, let me know and I'll post it up.

Jon

 

[Robert Baer]

Dirk Bruere at Neopax wrote:

http://news.bbc.co.uk/1/hi/technology/4061375.stm

Anti-spam plan overwhelms sites
A plan to bump up the bandwidth bills of spammers seems to be getting out of
control.

------------ SNIPped for brevity -------------

By definition (as i understand it) the traffic created by those
screensavers WAS spam!

 

[Ian Stirling]

Michael Noone <mnoone.uiuc.edu@127.0.0.1> wrote:

Hi - I was hoping to find a flexible LCD display, preferrably as thin as
possible and equipped with a backlight. I need something maybe 2x4 inches,
graphic or text doesn't matter, and it would be awesome if it had a
controller chip so I don't have to deal with that nonsense. Does such a
beast exist? Thanks!

No.
There are some on the horizon, but none actually arrived.
You can get some electroluminescent displays that are flexible IIRC.

 

[Dirk Bruere at Neopax]

Robert Baer wrote:

Dirk Bruere at Neopax wrote:

http://news.bbc.co.uk/1/hi/technology/4061375.stm

Anti-spam plan overwhelms sites
A plan to bump up the bandwidth bills of spammers seems to be getting out of
control.


------------ SNIPped for brevity -------------
By definition (as i understand it) the traffic created by those
screensavers WAS spam!

Not really, since those sites advertised for the hits.
Maybe a DoS attack, perhaps.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org

 

[Mac]

On Fri, 03 Dec 2004 16:55:22 +0100, martin griffith wrote:

On Fri, 03 Dec 2004 05:20:21 GMT, in sci.electronics.design Mac
foo@bar.net> wrote:

What is the best way to handle analog switching for line-level
high-fidelity audio? I don't think I want to use mechanical switching
because nice switches seem kind of pricey, and I might want to use a
remote control in a future revision.

So, I guess I am looking for a good analog mux or switch which won't
introduce distortion. For example, I looked at the SNL74LVC2G53, but it
seems as though it would add too much distortion for a hi-fi application.

Can I just use an N-channel MOSFET with the gate pulled to +/- 15
Volts for on and off, respectively? Any particular part recommendations?

I think I remember Win recommending using two MOSFET's in series, but I
think the idea was to float the gates at vs + 15V somehow. I don't want to
do anything that tricky if I can avoid it. ;-)

Oh, I am planning on having +/- 15 volt rails for the analog circuitry,
and I guess I'll need some 5 Volts for the digital circuitry. I'd like to
keep the 5 Volts to, say, under 10mA, if possible.

--Mac
I still use relays,
http://www.pickeringrelay.com/selectby.htm

for example
series 100
Ideal for data acquisition - Thermal EMF of 1pV or less!

or series 101, 74 logic compatable




martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.

After I posted, I realized that I hadn't even considered relays. Thanks
for recommending specific ones. I will have a look.

--Mac

 

[Jim Meyer]

fedrive@pacbell.net (grey eminence) wrote in message news:<ddca882f.0412022028.3fd9451d@posting.google.com>...

Quantum entanglement occurs when two or more particles interact in a
way that causes their fates to become linked:

That statement should be in a dictionary as a perfect example of
elliptical reasoning.

Austrian physicist Erwin Schrödinger in 1925 showed that if two
particles are prepared in a quantum state such that there is a
matching correlation between two ?canonically conjugate' dynamical
quantities ? quantities like position and momentum whose values
suffice to specify all the properties of a classical system ? then
there are infinitely many dynamical quantities of the two particles
for which there exist similar matching correlations: every function of
the canonically conjugate pair of the first particle matches with the
same function of the canonically conjugate pair of the second
particle.

Erwin always a joker. Did you ever hear his story "The Cat in the
Box"?

Jim "I do not like green eggs and ham." Meyer

 

On Sun, 28 Nov 2004 13:44:04 +0000, Guy Macon
<http://www.guymacon.com> wrote:

One of the fellows working for me designed this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3856393230

It's a simple product, but any comments on the design of it
would be most appreciated.

How about having banana jacks (like a vom has) instead of a terminal
strip? That would certainly make it quicker to use and most people
needing a decade box would have a set handy.

-Chris

 

[Guy Macon]

chris@nospam.com wrote:

Guy Macon <http://www.guymacon.com> wrote:

One of the fellows working for me designed this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3856393230

It's a simple product, but any comments on the design of it
would be most appreciated.


How about having banana jacks (like a vom has) instead of a terminal
strip? That would certainly make it quicker to use and most people
needing a decade box would have a set handy.

Good suggestion. I will look into them. The good ones also work
with bare wires...

 

[Jonathan Kirwan]

On Fri, 3 Dec 2004 05:00:29 -0500, Active8 <reply2group@ndbbm.net> wrote:

Heh. My model has Vaf set at 74.03
^^ ?!

Oh, well. Such is the life of a spicer, I suppose.

Jon