PRC as a amplifier in GPS question.

"FS" <TelkomDSL7801@telkomsa.net> wrote in message
news:bdeqod$onr$1@ctb-nnrp2.saix.net...
hello
does anybody know where i can get a schematic for a car alarm with a low
part count / cost?
www.microchip.com

Every car alarm i have seen is based on a PIC. Check out their keyloq
section, thats where it all hides.

PS, its going to be cheaper and easier to buy one..
 
The ERC list didn't have anything on it. I had to add all those nodes because
when I went to update the PCB, I got a "node not found" error on some
connections.

"Tom L" <void@nowhere.com> wrote in message
news:59mifv02v3fnqdb7gt5n76so7quavukvn7@4ax.com...
On Wed, 25 Jun 2003 16:40:30 +1000, "Andy, The Real"
ihatehifitrolls@yahoo.com.au> wrote:
I did (all (s)he had to do was ask). See further down in the thread.

Still I doubt a student studying electronics could get through 3 years
of schooling and (probably) years of amateur interest in the subject
without seeing lots of schematics and how they should be drawn.

Go check out UQ and QUT, they teach more management skills than they do
engineering. Its pathetic. They also lack practical skills, which I believe
is crucial in engineering. Thats why I tossed in the QUT degree I was
studying. Learn more working. Maybe they should include a full course in
protel and orcad at the uni's.


Wires drawn over components? IMH that's just stupid. At least he got
the left side input right side output bit correct, but that could have
been luck (50/50 chance).

Thats only half of the problem, the circuit is not electrically correct. If
an ERC was done i reckon there would be pages and pages of errors. Notice
all those junctions??
 
On Tue, 24 Jun 2003 17:24:08 +0200, "Deamond" <bariko@des_oon.net>
wrote:

Hi..

What happens if I connect one Car Ignition coil
as a sound speaker to my radio?

What's he doing hanging from the roof?
He thinks he's a lightbulb.
Get him down!
What! Work without light?

Al

2003 insult page awaits your contribution
http://kwakakid.cjb.net/insult.html
 
Paul Keinanen <keinanen@sci.fi> writes:

And how exactly will a point to point environment be improved by
changing the ethernet from 100 Mbps to 10 Mbps? What costly resource
does 100 Mbps Ethernet have that a 10 Mbps Ethernet does not have?

Noise margin.
.... and power consumption. YMMV but it seems that 100 Mbit/s
chips require roughly three times the power of 10 Mbit/s chips.

- Ville

--
Ville Voipio, Dr.Tech., M.Sc. (EE)
 
:)

nice :)

"Albm&ctd" <al_bmandctd@connexus.net.au> wrote in message
news:3efbd263.1410743@news.cis.dfn.de...
On Tue, 24 Jun 2003 17:24:08 +0200, "Deamond" <bariko@des_oon.net
wrote:

Hi..

What happens if I connect one Car Ignition coil
as a sound speaker to my radio?

What's he doing hanging from the roof?
He thinks he's a lightbulb.
Get him down!
What! Work without light?

Al

2003 insult page awaits your contribution
http://kwakakid.cjb.net/insult.html
 
On Thu, 26 Jun 2003 14:49:40 GMT, "Eugene Rosenzweig"
<ugn@hotmail.com> wrote:

xport sounds interesting but reading about it I gather that what you get is
a utility to control high-level aspects of the controller like webserver,
dns, etc but if you want to write custom software you need a compiler (free)
and a kit from them
(http://www.lantronix.com/products/eds/xport/XPort_faq_910-812.pdf):

A. For custom applications, please contact your Lantronix representative for
details on how to obtain a CPK
(Programmer's Kit) and information on training programs and classes.

Would suddenly be a lot more expensive if you had to pay for the sdk. I
wanted to take a look at their pub ftp site but could not connect. I guess
they are very popular...
It can still be used as a serial to ethernet device server cant it? I
got the impression that it could - but I have not looked that closely
yet.
 
Could not find direct reference to this question. I am guessing it probably
could, since their devkit you purchase uses the serial port. However if
thats all you want, it is cheaper to use the FTDI USB<->serial chip that was
mentioned in another post. Also, I noticed that the serial on XPort is
non-5v tolerant which means you might need an interface chip. Still a great
product though - a lot of functionality in a little package. Still would be
interesting to know the cost of the sdk.

"Tom L" <void@nowhere.com> wrote in message
news:el0ofv0gv8anlk0gd4ttt3089amu49g1e7@4ax.com...
On Thu, 26 Jun 2003 14:49:40 GMT, "Eugene Rosenzweig"
ugn@hotmail.com> wrote:

xport sounds interesting but reading about it I gather that what you get
is
a utility to control high-level aspects of the controller like webserver,
dns, etc but if you want to write custom software you need a compiler
(free)
and a kit from them
(http://www.lantronix.com/products/eds/xport/XPort_faq_910-812.pdf):

A. For custom applications, please contact your Lantronix representative
for
details on how to obtain a CPK
(Programmer's Kit) and information on training programs and classes.

Would suddenly be a lot more expensive if you had to pay for the sdk. I
wanted to take a look at their pub ftp site but could not connect. I
guess
they are very popular...

It can still be used as a serial to ethernet device server cant it? I
got the impression that it could - but I have not looked that closely
yet.
 
On Fri, 27 Jun 2003 09:25:05 GMT, "Eugene Rosenzweig"
<ugn@hotmail.com> wrote:

Could not find direct reference to this question. I am guessing it probably
could, since their devkit you purchase uses the serial port. However if
thats all you want, it is cheaper to use the FTDI USB<->serial chip that was
mentioned in another post. Also, I noticed that the serial on XPort is
non-5v tolerant which means you might need an interface chip. Still a great
product though - a lot of functionality in a little package. Still would be
interesting to know the cost of the sdk.
Hmm... it's starting to not sound so good.

I'll check out the FTDI chips.

Thanks.
 
Tom L wrote:
On 26 Jun 2003 23:42:56 GMT, "Fat Crack Ho"
s363281@student.uq.edu.au> wrote:

The ERC list didn't have anything on it. I had to add all those nodes because
when I went to update the PCB, I got a "node not found" error on some
connections.

Have a look at R4 it is shorted to U4 pin5 (or was that on purpose?).

Also there should not be junctions where one wire joins a component
pin. This is due to :

1) incorrect library part with superimposed pins

or more likely:

2) You have overshot the "hot point" of the component pin. i.e. you
did not stop drawing the wire when you reached the end of the
component pin.

Node not found is a synchronization problem between the schematic and
PCB. Your schematic parts do not match your footprints, the schematic
pins must have the same pin number (though this can be a text string)
as the footprints pad designator.

Another thing to watch out for : are you drawing with wires or lines?
Lines are a drawing object and do not convey any electrical info to
the netlist.
That would be my guess .. the first time I went back to Protel I used
the
graphical lines instead of the wires (the bent tramline symbol) and
was slightly confused when the autorouter didn't run any tracks ...

If you post the Protel .sch file I can check it .. along with many
others I guess .. (Protel 98/99SE I hope - can't justify DXP)

Tony
 
Markus Zingg wrote:
Has anyone come across an ethernet controller that is relatively easy to
interface with a microcontroller? Has anyone had any experience with the
8019?


Craig

The RTL8019 AS is 5 V only making it not the ideal candidate if you
have a 3.3V CPU. Another option is the Cyrrus logic cs8900a which is
also just 10Mb but available in a 3.3V variant. There is a 100MB chip
with ISA interface available from SMSC. The partnumber is something
like 9xxxx. You should easily find it if you browse their pages.

HTH

Markus
Hello all

I was just wondering if anyone had been able to get small quantities of
SMSC parts and where from?
I tried the local rep a while ago, but the minimum quantity was too
high; 360 from memory for a multi-io chip.

Regards
Paul Bealing
www.pmb.co.nz
 
"Ewan Sinclair" <ewan_sinclair@hotmail.com> wrote in message
news:xVqKa.3351$ps6.438398@ursa-nb00s0.nbnet.nb.ca...
I am looking for some information on wireless lan interfacing to micro
controllers, other than PC PCI or PCMCIA cards, is there any easy off
the shelf product, i am thinking of wireless access point and micro
controller with 10 base T interface.

I've no idea how much they cost, but these guys make embedded java
microcontrollers with built in ethernet:
http://www.ibutton.com/TINI/index.html

They have a complete solution on a board here:
http://www.ibutton.com/TINI/hardware/index.html
at the fairly reasonable cost of $50 (click on the sales and marketing
link
to buy one). Although it seems there's an 8-12 week wait t get hold of
one.

Ewan
that is just a dallas 80c400 with a java interpter

80c390 is also very nice.
http://www.maxim-ic.com/MaximProducts/Microcontrollers/Network.htm
dallas maxim are generous with samples. :)

atmel make wireless to ethernet gateway chips
http://www.atmel.com/products/8051/atweb.asp

have a look at www.edtp.com
they do ethernet boards for micros
same guy who wrote this
http://www.circuitcellar.com/library/print/1002/eady147/index.htm

also www.ethernut.de
http://www.ethernut.de/en/isa/index.html for interfacing a micro with a isa
ethernet card

Alex
 
Paul Bealing wrote:
Markus Zingg wrote:
Has anyone come across an ethernet controller that is relatively easy to
interface with a microcontroller? Has anyone had any experience with the
8019?


Craig

The RTL8019 AS is 5 V only making it not the ideal candidate if you
have a 3.3V CPU. Another option is the Cyrrus logic cs8900a which is
also just 10Mb but available in a 3.3V variant. There is a 100MB chip
with ISA interface available from SMSC. The partnumber is something
like 9xxxx. You should easily find it if you browse their pages.

HTH

Markus
Hello all

I was just wondering if anyone had been able to get small quantities of
SMSC parts and where from?
I tried the local rep a while ago, but the minimum quantity was too
high; 360 from memory for a multi-io chip.
Here in the US it looks like I can order 1 of the LAN91C111NC from
Nuhorizons for $24. Sometimes when you try to order small quantities,
only then do they tell you about minimums. Can you order on the web
from the US?

http://nunext.nuhorizons.com/NuNext/servlet/NUHOnlineOrderingPartSearch?mode=Search

--

Rick "rickman" Collins

rick.collins@XYarius.com
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design URL http://www.arius.com
4 King Ave 301-682-7772 Voice
Frederick, MD 21701-3110 301-682-7666 FAX
 
Your gate driver ICs are grounded to -12V rail, instead of ground, on
this schematic.

So is the crystal oscillator for the CPLD/PIC.

If this reflects reality, fix it and see what happens.

RL
 
Phil wrote:
Hi,

I'm building an amplifier and am dismayed at the rather poor choice of boxes
that I have seen on offer from Dickies, Jaycar and Electus. Does anyone
remember the enclosures that were used to house the Playmaster series
amplifiers, with the two side panels all being heat sinks? That's the sort
of box I'm looking for. Any idea where I can pick one up or similar? The
closest thing I have found is a rack mount case, but I have no need for a
rack mount system.

Cheers,
Phil
You could get the mounting ears cut off by your local friendly sheetmetal firm
who should have a guillotine.

--

Regards
David Milne
 
"LEEANNE TURNER" <turner10@iprimus.com.au> wrote in message
news:3efd9d22_1@news.iprimus.com.au...
do u know a good supplier of these jaycar aint got much looking for one
that
I can use without altering timer so switched with 240volt would help seen
them but not for sale in australia
**Try Farnell. Their range is good, if not a little expensive.


--
Trevor Wilson
www.rageaudio.com
 
Hi,

Yeah - 99SE is quite good - but the occassional problem where it
locks up and you have to use Task Manager to kill it (losing the
mornings work) does get a little discouraging :(

(Tracked this one down to trying to do a DRC on a file with
whitespace in the file/directory path ... bummer!)

Tony


"Andy, The Real" wrote:
"Tony de Groot" <tonydg@wantree.com.au> wrote in message
news:3EFC40F5.9F27070D@wantree.com.au...

snip
If you post the Protel .sch file I can check it .. along with many
others I guess .. (Protel 98/99SE I hope - can't justify DXP)

I haven't even looked at DXP yet, dont feel the need. What was wrong with
99se?!? Anyone out there used DXP yet??
 
On Sat, 28 Jun 2003 15:38:58 GMT, "Phil"
<haxby@removethisbitandjustleave dodo.com.au> wrote:

Hi,

I'm building an amplifier and am dismayed at the rather poor choice of boxes
that I have seen on offer from Dickies, Jaycar and Electus. Does anyone
remember the enclosures that were used to house the Playmaster series
amplifiers, with the two side panels all being heat sinks? That's the sort
of box I'm looking for. Any idea where I can pick one up or similar? The
closest thing I have found is a rack mount case, but I have no need for a
rack mount system.

Cheers,
Phil


I think you will have to modify an existing case or have your own one
made.

Go to a sheet metal worker and enquire. Obviously they aren't going
to be as cheap as a mass-produced case - but I find they are pretty
good value for money and quite helpful. I don't think it will be a
really hard job for them. You can specify nice thick panels etc too
:)

As for heatsinks - go and buy a suitable pair of them from dick
smith/jaycar etc and design and build the box around them.


Course you could still do it the way that SC did once and use the case
from a PC as an ampilifier housing :)
 
"Mich Johns" <mich@net.au> wrote in message
news:dt6gev0o9v1gfqefootucrpn7dakcpsb0i@4ax.com...
On Thu, 12 Jun 2003 13:57:22 +1000, "Rudolf Ladyzhenskii"
rudolf.ladyzhenskii@REMOVETOREPLYadcomtech.net> wrote:

IT Warehouse is not that cheap.
They do have cheap stuff, but if you are after the brand names (And good
quality stuff for that matter), they are not the best. Sometimes they
have
good stuff cheaper than others, but most of the times they are not. Get a
green guide and compare them to others. I do not want to advertise for
anyone, so no company names here.

Beside, people at IT Warehouse near where I leave are not very friendly.

Rudolf


Fair enough, they might not be the cheapest, but who wants to travel
to the other side of Melbourne or buy interstate just to save about 10
bucks?
But is the hassle of cheap boards worth saving $10.

I'd rather pay for an asus board(usually bit(or good bit)) more expensive
but not have to worry about it going dead or if it does
having no hassles with the warranty.

Alex
 
"Tony de Groot" <tonydg@wantree.com.au> wrote in message
news:3EFE41B2.F3A7D6E3@wantree.com.au...
Hi,

Yeah - 99SE is quite good - but the occassional problem where it
locks up and you have to use Task Manager to kill it (losing the
mornings work) does get a little discouraging :(

(Tracked this one down to trying to do a DRC on a file with
whitespace in the file/directory path ... bummer!)
The only problem I have had with 99se (since moving to winXP) is the
occasional database problem. Dont know how it works but seems to me like
some deadlock condition occours in the db. Any idea on the breed of db
used??

PS, Fat Crack Ho, I'm between jobs at the moment and will have a few weeks
off. If you need some Protel tutes (free) then give me a shout.
 
On Thu, 08 May 2003 12:47:54 GMT, Greg Bonner
<KILLSPAMgregbonner@aapt.net.au> wrote:

Looking for any circuit ideas... The situation:

A commerical (heavy) non-moveable sig gen with two separate line-level
outputs. Is rarely changed from these two settings.

Large rented workshop. Read: Fussy landlord who won't allow cabling
through building.

Ideally, we'd like to be able to simply transmit the two outputs from
the sig gen wirelessly on two different frequencies.

All we have is the two line level outputs... Can someone suggest a
simple tx circuit we could use to transmit the sig gen output - say at
about 2.4MHz at 5-10W?

Greg.

are you sure you would need THAT much transmitting power ??
That would probably transmit for miles !
 

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