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server
Guest

Tue Sep 28, 2004 10:35 pm   



message unavailable

Al Borowski
Guest

Tue Sep 28, 2004 10:35 pm   



Hi,

boki wrote:
Quote:
Dear All,
Why not burn burn device driver into device directly, when
device install to Windows/Linux/OS2..., system could get driver from
device directly?
( I mean USB devices)

Well I'm not expert, but I can think of some problems with this. First,
it's cost more. You'd need a big chunk fo flash ROM to store the
drivers. This reason alone probably makes it unfeasible. Also what
happens when the company wants to update the drivers? Most devices are
shipped with old version. You'd probably want to download the latest
ones from the web anyway.

I don't think the extra cost/complexity outweighs just shipping the
customer a CD with the product.

cheers,

Al


Quote:


Best regards,
Boki.


Frithiof Andreas Jensen
Guest

Wed Sep 29, 2004 10:33 am   



"BEVERNON" <bevernon_at_aol.com> wrote in message
news:20040928230823.01624.00001524_at_mb-m28.aol.com...

Quote:
1) simply connecting to the printer port and kludging a way to read the
port
under windows (not always reliable).

Should be perfectly Ok, provided your custom driver is!

Quote:
Any suggestions?

Soundcard - available on any PC and has drivers already - and an encoder to
map 4 bits into distinct voltage levels; i.e. a DAC (or 5 resistors....).
Then decode on the application side. Charge a bundle for the converter box
Wink

Winfield Hill
Guest

Wed Sep 29, 2004 10:34 am   



John Crighton wrote...
Quote:

On Wed, 29 Sep 2004 03:13:24 +1000, <40Amp> wrote:
Where can I find 24v upto 40Amp H bridge DC motor driver schematics?

Here is one
http://www.pmb.co.nz/pub/index.htm
go to the bottom of the page.
http://www.pmb.co.nz/downloads/dgc_old_scp.pdf

That one is overly complex with poor performance, and has a
fatal flaw to boot. Not recommended.


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)

Frithiof Andreas Jensen
Guest

Wed Sep 29, 2004 10:39 am   



"Jim Miller" <jim_at_removethisjtmiller.com> wrote in message
news:2KOdnWsuLvZBR8TcRVn-oQ_at_comcast.com...

Quote:
what's the darling pair today? is the 2n3904 the current npn utility?
what's
the one for pnp?

Ohhh -

I cannot tell since I have not yet used the two 500 pcs bags of BC547/BC557
I bought for total amont of about USD 7. some time ago. I only *needed* 10
of each flavour - but - the hobbyist bags of 25's were priced at USD 3.
Each!!!

Pat Ford
Guest

Wed Sep 29, 2004 10:47 am   



try www.ghw-grote-hartmann.de\
or
www.colehersee.com


Pat
"Rich Grise" <null_at_example.net> wrote in message
news:Ltf6d.7084$me5.4321_at_trnddc06...
Quote:
On Thursday 23 September 2004 12:25 pm, Mark W. Lund, PhD did deign to
grace
us with the following:

This illustrates the problem. Customer went down to Pep Boys and
picked out a connector for his product. Unfortunately I can't
put "pep boys" on the bill of material as a supplier.

Then go buy a handful out of petty cash, and put yourself as supplier.

Good Luck!
Rich


Frithiof Andreas Jensen
Guest

Wed Sep 29, 2004 10:56 am   



"Joerg" <notthisjoergsch_at_removethispacbell.net> wrote in message
news:omm6d.2520$JG2.135_at_newssvr14.news.prodigy.com...


Quote:
Regarding the topic here I wonder what would be the most popular cheap
npn power work horse. When I was a kid the 2N3055 was used for almost
everything.

And did that suck too ;-)

Something in TIP and TO220/TO247 would be my favourite today - or maybe
"Deflection", the BU25xx since the 2N3055 usually appears to be driving
ingnition coils, judging from the posts.


Guest

Wed Sep 29, 2004 11:10 am   



What would you recommend?

Quote:
That one is overly complex with poor performance, and has a
fatal flaw to boot. Not recommended.


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)


Daniel Haude
Guest

Wed Sep 29, 2004 11:56 am   



["Followup-To:" header set to sci.electronics.design.]
On Wed, 29 Sep 2004 22:10:25 +1000,
<Poseidon> <> wrote
in Msg. <415aa632$0$20578$afc38c87_at_news.optusnet.com.au>
Quote:

What would you recommend?

I'd build one around the HIP4081A. Look at the data sheets and app notes
on the Intersil website.

--Daniel

--
"With me is nothing wrong! And with you?" (from r.a.m.p)

Fred Bloggs
Guest

Wed Sep 29, 2004 12:33 pm   



robin.pain_at_tesco.net wrote:

Quote:

*although technically correct, this is really a lie because I look a
lot older (and act a lot younger).

Progeria and arrested development due to substance abuse...as if anyone
can't tell you have problem the minute you open that anus on your face.

John Woodgate
Guest

Wed Sep 29, 2004 12:45 pm   



I read in sci.electronics.design that Fred Bloggs <nospam_at_nospam.com>
wrote (in <415AB69C.6090101_at_nospam.com>) about 'Labour Party Conference
Report', on Wed, 29 Sep 2004:

Quote:
Too funny! When is the earliest you can eject that low-life from
office?!

If you believe what Burrage wrote, you cannot possibly be relied on to
pronounce on US politics or anything else.
--
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 Woodgate
Guest

Wed Sep 29, 2004 12:49 pm   



I read in sci.electronics.design that Tim Mitchell
<timng_at_sabretechnology.co.uk> wrote (in <M3x60tsvRrWBFAtj_at_tega.co.uk>)
about 'Soundcard voltage limiter?', on Wed, 29 Sep 2004:

Quote:
not sure how inductive thermistors are

They are normally bulk material, not spiralled film or anything that has
more inductance than a straight wire.
--
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

Fred Bloggs
Guest

Wed Sep 29, 2004 12:57 pm   



John Woodgate wrote:
Quote:
I read in sci.electronics.design that Fred Bloggs <nospam_at_nospam.com
wrote (in <415AB69C.6090101_at_nospam.com>) about 'Labour Party Conference
Report', on Wed, 29 Sep 2004:


Too funny! When is the earliest you can eject that low-life from
office?!


If you believe what Burrage wrote, you cannot possibly be relied on to
pronounce on US politics or anything else.

Yes of course I took Burridge's post as the literal truth... I do know
that a recent poll of the UK showed 70% of the population favoring
withdrawal from Iraq.

Winfield Hill
Guest

Wed Sep 29, 2004 1:00 pm   



<Poseidon> wrote...
Quote:

What would you recommend?

A 1kW H-bridge is not a good choice for a high-power-novice
copy-the-schematic project (making no assumptions about you).

I'd begin with my favorite HIP4081A H-bridge driver IC, add
some large MOSFETs, evaluate snubbers and filters, and move
on to considering protection and controller schemes. Hmm,
perhaps that's backward, and one should start by evaluating
recent motor-controller ICs first, and move on FETs, etc.


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)

Dirk Bruere at Neopax
Guest

Wed Sep 29, 2004 1:02 pm   



Fred Bloggs wrote:
Quote:


John Woodgate wrote:

I read in sci.electronics.design that Fred Bloggs <nospam_at_nospam.com
wrote (in <415AB69C.6090101_at_nospam.com>) about 'Labour Party Conference
Report', on Wed, 29 Sep 2004:


Too funny! When is the earliest you can eject that low-life from
office?!



If you believe what Burrage wrote, you cannot possibly be relied on to
pronounce on US politics or anything else.


Yes of course I took Burridge's post as the literal truth... I do know
that a recent poll of the UK showed 70% of the population favoring
withdrawal from Iraq.

Quite understandably.
The entire pretext for the war was a lie.

--
Dirk

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

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