Driver to drive?

[Ken Smith]

In article <41AC0BDF.73B7875E@hotmail.com>,
Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:
[...]

Sounds totally OTT. But what's a NIM module anyway ?

"Nuclear Instumenatation Module"

--
--
kensmith@rahul.net forging knowledge

 

[Ken Smith]

In article <41AC0AD2.6F9BB2ED@hotmail.com>,
Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:
[...]

After a few months of being hassled when I said no, I took to spouting
random digits - if ya cant beat 'em, shit in their database.

Did you give a 555 area code ?

806 could be more fun.

I have actually given 123 Main St. as the address.

For real fun, we should look up the home address of the president of Radio
Slack and give all give that address.

--
--
kensmith@rahul.net forging knowledge

 

[Kryten]

You could try putting strips of SMD parts in the plastic holders they use
for keeping photographic negatives in folders. You can flip through these as
fast as a book, and no booting your PC.

Film canisters are good for bits with wires that won't appreciate endless
bending.


I try to avoid the problem by only ordering components when I have a project
that needs them.

I tell myself I can't buy stuff until I have a fully designed circuit to use
them.

I have thus avoided having lots of half-done none-working projects and
wasted money.

However, since I got into FPGA/CPLD/Flash, I do have quite a lot of TTL/LSI
chips I do not need.
Z80 CPU/CTC/DART, 4164, 41256, 62256, EPROMs etc.

Perhaps I should make a dozen replica ZX81/Spectrums and give them as gifts?

 

[Rich Webb]

On Tue, 30 Nov 2004 23:22:21 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hi Rene,

As to the file, I made a webpage (not to be released) where
I can view the list of parts, with links to the sorted datasheets.


Interesting. Can that web page sort? For example, if you wanted to know
which different types of Schmitt trigger chips you have on hand, or what
kinds of FETs in SOT23 package, could it list that for you?

I'm not Rene (but I think that's a dang good idea).

What could be done would be to use a setup like MySQL or PostreSQL for
the database and use PHP as the glue between the query language and the
web page creation.

--
Rich Webb Norfolk, VA

 

[Winfield Hill]

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.


--
Thanks,
- Win

 

[Clarence]

"Winfield Hill" <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote in message
news:cojcu602kkk@drn.newsguy.com...

Tom Woodrow wrote...

Send a See's gift certificate next year.

Ah, See's I heartily recommend. Good stuff from California. But
not as a replacement for stupidity. Apparently a widely-held view,
http://www.cnn.com/CNN/Programs/paula.zahn.now/ and VIEW RESULTS at
the voting booth, "Do you think the Department of Homeland Security
has made America safer?" Yes 25%, No 75%. Now that's a landslide.

They didn't control the borders and expell all illegal aliens!
So we are not "safer" IMO.

 

[Pooh Bear]

"Dmitri(Cabling-Design.com)" wrote:

How do you guys keep track of your parts?

As long as you keep your zip closed they should be safe.


Graham ;-)

 

[Terry Given]

Spehro Pefhany wrote:

On 30 Nov 2004 19:14:14 -0800, the renowned Winfield Hill
hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:


Tom Woodrow wrote...

Send a See's gift certificate next year.

Ah, See's I heartily recommend. Good stuff from California.


But if you really want Mackintosh toffee or a mint Aero bar (or a can
of Tim Horton's coffee) what good does that do you?


Best regards,
Spehro Pefhany

Come to NZ if you want Mackintosh toffees.

Cheers
Terry

 

[Terry Given]

John Popelish wrote:

Terry Given <my_name@ieee.org> wrote in message news:<HsSqd.18684$9A.310493@news.xtra.co.nz>...

John Popelish wrote:


Yep. A good data sheet is much better than an assumption:
http://www.irctt.com/pdf_files/HSF.pdf


Wow, thats GREAT! pisses all over the CHP series!

I'll remember that part, thanks John.


Now, find me someone who stocks them.

doh.

Cheers
Terry

 

[Rolavine]

I've got, plastic multicompartment bins, small boxes, big boxes, spare parts
organized by type or by the project they were used in also in boxes, metal
multicompartment boxes holding parts for systems I've designed and sometimes
have assembly houses build for me, drawers full, boxes full of sweepings, at
least ten boxes with different connectors organized by type, two huge boxes
with smaller boxes in side holding hardware, and always an assortment of parts
that have migrated to the corners of my work bench. What a damn mess, sometime
when I have 6 months off I'm going to organize them, but wait if I actually had
6 months off I'd be living under a bridge. The funny thing is for a new project
I'll just order what I need from Digi Key rather than even looking through my
junk, lol.

Rocky

 

[VMI]

What a list of replies.
The guy wants a databas for his parts.
Here it is (29US$)
It cost a fraction of the components laying around and it tells you the
quantity, where they are, where they came from, the price, brand and so
on....
Look here:
http://www.glass-ware.com/programs/TCJ_Programs_files/TCJ_MyStockDB.htm
Cheers,
Marco

 

[Bill Bowden]

byron@cc.gatech.edu (Byron A Jeff) wrote in message news:<coi37q$4t6@cleon.cc.gatech.edu>...

In article <41AB98C1.8000002@netscape.net>, mike <spamme0@netscape.net> wrote:

-David Harper wrote:

There's a simple solution to all of these problems, that David planned to
take anyway: use a high level language that hides all of those details.
Languages like JAL, XCSB, and PicBasic nullifies the vast majority of
banking issues.

Any idea of the speed and size penality for using a high level language?
How much more memory is required to do the same task in Basic as
opposed to assembly?

-Bill

 

[Paul Burke]

Dmitri(Cabling-Design.com) wrote:

Still, my major problem is not storing - it's recalling ;-)! I do have
general idea about where my resistors, caps and so forth are, but I seem
to spend frustratingly much time on verifying if I have a particular value
resistor or cap or else. This is where I think some kind of software
database might be a big help.

Resistors and most-used caps in drawer units (little ones, 3 values to a
drawer). Most used ICs etc. in drawer units. You can see the drawer
units, so you can't forget where they are. Everything else bought for
the occasion, it's not worth the time and effort of remembering where
they are. Clear out periodically and give the sweepings to the school
electronics club.

Think of the time you'll spend setting up and maintaining the database.
How many resistors did I get out for that quick and dirty try-out? And a
database that's out of date is, m'Lud, a Snare and a Delusion.

Paul Burke

 

[Paul Burke]

Terry Given wrote:

Funnily enough I was telling the truth in that instance - it really WAS
for "crippled, deformed and retarded people" although arent we supposed
to call them "differently abled" - yah bollocks. Genetic mutation =
mutant I say. And people often get deeply offended when, in an attempt
to be PC, I use the non-gender-specific term "it". People are the best
toys.

I've never met a disabled person who didn't prefer 'cripple' - said as a
pure description and without malice- to any of the fudged terms. And all
the alternatively sighted people I know prefer 'blind'.

I've forgotten who said it, back in the Civil Rights days: "I'd rather
have a man say 'nigger' and think 'friend' than say 'friend' and think
'nigger'."

Paul Burke

 

[Terry Given]

Rich Webb wrote:

On Tue, 30 Nov 2004 23:22:21 GMT, Joerg
notthisjoergsch@removethispacbell.net> wrote:


Hi Rene,


As to the file, I made a webpage (not to be released) where
I can view the list of parts, with links to the sorted datasheets.


Interesting. Can that web page sort? For example, if you wanted to know
which different types of Schmitt trigger chips you have on hand, or what
kinds of FETs in SOT23 package, could it list that for you?


I'm not Rene (but I think that's a dang good idea).

What could be done would be to use a setup like MySQL or PostreSQL for
the database and use PHP as the glue between the query language and the
web page creation.

ROTFLMAO!

Perhaps a neural net...

Cheers
Terry

 

[Paul Burke]

Winfield Hill wrote:

JeffM wrote...

when this stuff was invented

Yup. Stroger Switches were invented in 1884--by an undertaker.


Do you think they used -48V back then?

I would imagine that the requirements for long(ish) distance
communication had been worked out long before, by the Morse telegraph
companies (you know, the clerk heroically tapping away with the arrow
stuck in his back, dies as the cavalry rides over the hill), though IIRC
they used single wire, earth return circuits. The polarisation to avoid
corrosion of the wires would have come out of that.

Paul Burke

 

[budgie]

On Tue, 30 Nov 2004 13:11:49 -0500, Mark Jones <abuse@127.0.0.1> wrote:

Hi. I'm looking at the LM3622 datasheet
(http://www.national.com/ds/LM/LM3622.pdf). It's a simple Li-ion
linear charger. Comes in 4v/8v Li-ion versions. In Li-ion topology, a
lot of fuss is made about the cell's final voltage accuracy and how
overshooting this will destroy the cell. But what would happen if two
cells in series were chargeed with one unequally depleted? Wouldn't
the other cell shoot way over its rated voltage, destroying it? It
makes no sense that nowhere has this been mentioned. Is this a real
concern? Should the two Li-ion cells in series be equalized when
charging or charged separately?

Most commercial multi-cell packs have a pack protection module. Among its
functions are detecting under/over voltage (of the series string as a whole),
over-current on discharge, and cell_voltage_imbalance.

The module intervenes by effectively turning off a FET in series with the cells,
thus preventing any significant current flow in or out. Cell imbalance is one
of the causes of pack "failure" in laptops.

 

[Jonathan Kirwan]

On 1 Dec 2004 01:58:12 -0800, "lemonjuice" <exskimos@anonymous.to> wrote:

snip
I posted my results earlier on this thread and I showed how you can use
beta. As a matter of fact it seems there is no way of including
the base and source resistances and hence getting a more accurate
result without including beta.

I saw a post of a spice simulation, with you saying: "I got 193 closer to the
spice simulation value." Later, I think, I also saw an expression without
derivation or basis, so I wasn't able to check your thinking. That's where I'm
at with what you wrote. I believe I exposed my thinking quite clearly, in
contrast.

Jon

 

[JeffM]

when this stuff was invented
Guy Macon

Yup. Stroger Switches were invented in 1884--by an undertaker.
JeffM

Do you think they used -48V back then?
Winfield Hill

A lot of choices in this world are simply convienience--or just arbitrary.
It always seemed logical that the battery level was raised
as soon as distances became significant.
I have long believed--with no proof--
that the polarity was selected arbitrarily way back when.
That the galvanic thing worked out well seemed like serendipity.

 

[Frithiof Andreas Jensen]

"Scott Miller" <scott@3xf.com> skrev i en meddelelse
news:10qkdhad5k7rmd7@corp.supernews.com...

I'm really trying to keep the cost and component count down to make it an
easy hobby project, but I'd also like it to not suck a battery dry in 2
hours. If anyone's got any suggestions on how to implement a better
regulator, or maybe a different supply design entirely, let me know.

Why not a Bang-Bang controller? How god does this have to be, anyway?

Basically, one uses a comparator with hysteresis to switch the HV Supply
on/off, between two set limits.
The filter capacitor will make sure that the total duty-cycle of the power
supply is very low, thus power
consumption will be low too. Easy.