PRC as a amplifier in GPS question.

[Chris Oates]

"Deamond" <bariko@des_oon.net> wrote in message
news:g2_Ja.1786$78.65630@news.siol.net...

Hi..

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

Car won't start

 

[Rudolf Ladyzhenskii]

Atmel has a reference design kit.

They use Crystal CS8900 chip. (I am putting one in a new design too). The
only drawback -- it is 10BaseT only, but I do not think you will use
100BaseT on a little micro anyway.

Rudolf

"Craig Rodgers" <craig@student.usyd.edu.au> wrote in message
news:bdcak4$fc$1@spacebar.ucc.usyd.edu.au...

I'm trying to provide network capabilities for an 8 bit micro (AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the
one
with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus,
something
I'm not game to try and drive with an 8 bit micro.



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



Regards



Craig Rodgers

 

[Ken Taylor]

"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

The TINI is one cool little beast, easy to use and (at least relatively)

cheap.

Ken

 

[the swan]

Rudolf Ladyzhenskii wrote:

Atmel has a reference design kit.

They use Crystal CS8900 chip. (I am putting one in a new design too). The
only drawback -- it is 10BaseT only, but I do not think you will use
100BaseT on a little micro anyway.

Rudolf

If you plan to use it in 8-bit mode be sure to do some research. There
are some gotchas and performance limitations with the CS8900 device in
8-bit mode.

"Craig Rodgers" <craig@student.usyd.edu.au> wrote in message
news:bdcak4$fc$1@spacebar.ucc.usyd.edu.au...

I'm trying to provide network capabilities for an 8 bit micro (AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the

one

with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus,

something

I'm not game to try and drive with an 8 bit micro.



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



Regards



Craig Rodgers

 

[Richard]

Craig,

This is the chip you want. NE2000 like the RTL8019AS, but 10/100; 5v
tolerant, but runs on 3.3v; LQFP-128 instead of TQFP-100. I've got one
wired to an Mega128 in 16-bit mode, due to a similar migration from the
RTL8019AS (for identical reasons). Only very slight extensions from
your NE2000 driver to configure the 100Mb features.

http://www.asix.com.tw/products/Ax88796.htm

For prototyping, this built board is actually cheaper than buying the
chips from Singapore (at least for the USA), and he'll sell you 1-off
chips too. Even with your proximity, you may find he offers a better
deal. (ASIX wanted $60USD for qty 1, plus s&h from Singapore.)

http://www.edtp.com/

The fellow who hosts this page also wrote an article in ~October 2002 in
CircuitCellar magazine discussing how to connect the Mega128 (in an
Atmel STK500 kit) with this proto board.


You are spot-on in your reasoning for switching controllers, although
technically the failing is in the RTL8019AS' ability to auto-negotiate.
It's just not part of the 10Mb spec.

While the 8019 can be forced into full-duplex mode to eliminate
collisions, detecting whether the switch is in FDX mode is a problem.
And this is also one of only two 8019 settings you can't elect through a
register - you have to install or emulate the EEPROM.

Cheers,
Richard

 

[bobi]

I got the Xport last week from Powercorp in Sydney. Very cool stuff. Soo
small. They are selling them as hot cakes and I was told I got the last one
for now.

"onestone" <onestone@bigpond.net.au> wrote in message
news:3EFA5636.EB726923@bigpond.net.au...

Craig the part I mentioned is from Lantronix. At < AUS$75 in singles.
from www.powercorp.com.au on 02 9476 3466 but see Taunos comments
regarding current consumption.

Al

Craig Rodgers wrote:

I was particularly interested in 10/100 controllers because of the
network
environment this device was going to be used in. The network that this
device is initially going to be tested on consists of Catalyst 3000
series
switches. The 100Mbs expansion cards available on these switches do not
auto
negotiate with 10Mbs clients. I'd really like to be able to add auto
negotiation to my system to cover this possibility.

The amount of data actually being transferred is very small in the order
of
ten's of bytes.

Craig

"Hans-Bernhard Broeker" <broeker@physik.rwth-aachen.de> wrote in message
news:bdcdtm$sgq$1@nets3.rz.RWTH-Aachen.DE...
In comp.arch.embedded Mark A. Odell <nospam@embeddedfw.com> wrote:
"Brett" <custserv@forums.ws> wrote in
news:bdcbjd$r4920$1@ID-184277.news.dfncis.de:

Since the ATMega128 can't handle100mbps (ISA bus is too slow) isn't
the
issue is moot?

Line rate and the CPU/bus's ability to handle this speed are not
intertwined.
[...]

I would dare say they are, at least as far as dedicated point-to-point
lines are considered. Having a high-speed capable line sit unused for
the majority of the time is bound to be wasting some (costly) resource
somewhere.

Shared-medium networks would be a different issue, obviously, but I
don't quite see what could be the benefit of having that buffer to
hold one complete Ethernet frame's worth of data on the embedded
device's end of that line, instead of at the hub, switch or whatever
is on the other end, where it'd usually be quite a bit easier to
accomodate it.

The only thing that would really be improved by such a plan would be
the latency, not the bandwidth. Sending shorter packets might be a
better plan, in that case.

--
Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de)
Even if all the snow were burnt, ashes would remain.

 

[Andy, The Real]

"Brian Goldsmith" <brian.goldsmith@nospamecho1.com.au> wrote in message
news:MqfKa.889$9g2.8662@news-server.bigpond.net.au...

Use Google in future to find out what stuff means.

Having a bad day Phil??


*** I didn't notice you replying to the OP,were you having a bad day?
Brian
Goldsmith.

If you mean me, nope. Not having a bad day. I never have bad days!!

 

[Andy, The Real]

"Craig Rodgers" <craig@student.usyd.edu.au> wrote in message
news:bdcak4$fc$1@spacebar.ucc.usyd.edu.au...

I'm trying to provide network capabilities for an 8 bit micro (AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the
one
with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus,
something
I'm not game to try and drive with an 8 bit micro.



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

The best one i have seen latey is the lantronix part that has the whole lot
in one RJ-45 socket. Good if your only doing a few, probably not so good if
you are an OEM. Soanar (polykom) do these parts. Not sure of the cost, but
I'm guessing they are probably not to badly priced.

Other solution is to use a NE2000 NIC. Dead simple!

 

[Don McKenzie]

Glenn Pure wrote:

Hi Don

As mentioned in the discussion on this when the programmer came out, a
design involving a single micro and little else would need heaps of
I/O lines (probably in the vicinity of 40 or so) - or an ordinary
amount of I/O and a pile of latches/buffers.

How are the USB interface prices looking now? I haven't checked
recently.

Cheers
Glenn

Hi Glenn,

ATMEGA128 has 53 I/O lines and is becoming very popular now.
Ports A to F by 8 bits, and port G by 5 bits, can all be configured as 8
bit bi-directional I/O.
and the FTDI USB chips make USB a breeze.
these USB chips are $10AUD in one offs, and need very little support
also.

--
Don McKenzie E-mail: http://www.dontronics.com/e-mail.html
Home Page: http://www.dontronics.com

Add USB to your favorite Micro. http://www.dontronics.com/dlp.html
The World's Largest Range of Atmel/AVR & PICmicro Hardware and Software

 

[Eugene Rosenzweig]

the unfortunate thing about the TINIS I found is that seems like you have to
get them from Dallas online which means $50 for the TINI and $50(!!!)
postage. Has anyone found an alternative (cheaper) way to get one?

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
news:bddlai$rql6b$1@ID-76636.news.dfncis.de...

"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

The TINI is one cool little beast, easy to use and (at least relatively)
cheap.

Ken

 

[Paul Keinanen]

On Wed, 25 Jun 2003 15:11:56 -0400, rickman <spamgoeshere4@yahoo.com>
wrote:

Hans-Bernhard Broeker wrote:

In comp.arch.embedded Mark A. Odell <nospam@embeddedfw.com> wrote:
"Brett" <custserv@forums.ws> wrote in
news:bdcbjd$r4920$1@ID-184277.news.dfncis.de:

Since the ATMega128 can't handle100mbps (ISA bus is too slow) isn't the
issue is moot?

Line rate and the CPU/bus's ability to handle this speed are not
intertwined.
[...]

I would dare say they are, at least as far as dedicated point-to-point
lines are considered. Having a high-speed capable line sit unused for
the majority of the time is bound to be wasting some (costly) resource
somewhere.

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.

A device designed for only 10 Mbit/s can have a much narrower
frequency response without destroying the eye pattern (ISI) than 100
Mbit/s. The narrow frequency rejects much of the high frequency noise
that might corrupt the 100 Mbit/s link. A narrow transceiver bandwidth
also reduces cable radiation, which can be important in some
situations. Don't use any data rates higher than necessary.

Paul

 

[Johnny]

On Wed, 25 Jun 2003 20:40:25 -0700, Richard <rh86@azglobal.com> wrote:


See the following URL for details of a design using ASIX Ax88796.

http://www.circuitcellar.com/library/print/1002/eady147/index.htm

regards,
Johnny.

Craig,

This is the chip you want. NE2000 like the RTL8019AS, but 10/100; 5v
tolerant, but runs on 3.3v; LQFP-128 instead of TQFP-100. I've got one
wired to an Mega128 in 16-bit mode, due to a similar migration from the
RTL8019AS (for identical reasons). Only very slight extensions from
your NE2000 driver to configure the 100Mb features.

http://www.asix.com.tw/products/Ax88796.htm

For prototyping, this built board is actually cheaper than buying the
chips from Singapore (at least for the USA), and he'll sell you 1-off
chips too. Even with your proximity, you may find he offers a better
deal. (ASIX wanted $60USD for qty 1, plus s&h from Singapore.)

http://www.edtp.com/

The fellow who hosts this page also wrote an article in ~October 2002 in
CircuitCellar magazine discussing how to connect the Mega128 (in an
Atmel STK500 kit) with this proto board.


You are spot-on in your reasoning for switching controllers, although
technically the failing is in the RTL8019AS' ability to auto-negotiate.
It's just not part of the 10Mb spec.

While the 8019 can be forced into full-duplex mode to eliminate
collisions, detecting whether the switch is in FDX mode is a problem.
And this is also one of only two 8019 settings you can't elect through a
register - you have to install or emulate the EEPROM.

Cheers,
Richard

 

[Tom L]

On Thu, 26 Jun 2003 17:49:34 +1000, "Andy, The Real"
<ihatehifitrolls@yahoo.com.au> wrote:

"Craig Rodgers" <craig@student.usyd.edu.au> wrote in message
news:bdcak4$fc$1@spacebar.ucc.usyd.edu.au...
I'm trying to provide network capabilities for an 8 bit micro (AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the
one
with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus,
something
I'm not game to try and drive with an 8 bit micro.



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


The best one i have seen latey is the lantronix part that has the whole lot
in one RJ-45 socket. Good if your only doing a few, probably not so good if
you are an OEM. Soanar (polykom) do these parts. Not sure of the cost, but
I'm guessing they are probably not to badly priced.

Other solution is to use a NE2000 NIC. Dead simple!

The list price for the Lantronix Xport is $49 US.
Been thinking about dropping one of these into my 1xrtt RTU project.

 

[Phil Allison]

"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?

** Get a "crook lock" - that has a low parts count.

A pit bull is another option ;-)



........... Phil

 

[Jeffrey A. Wormsley]

Ville Voipio <vvoipio@kosh.hut.fi> wrote in
news:i3kznk686yu.fsf@kosh.hut.fi:

If you can live with these (and the cost), the part is an easy
and compact solution.

Don't forget living with the single source nature of the part as well. A
different PHY might be easier to handle than a whole new connection scheme.


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---

 

[Eugene Rosenzweig]

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...

"Tom L" <void@nowhere.com> wrote in message
news:glrlfvsb669hl2tc2rpipunubnseiiluds@4ax.com...

On Thu, 26 Jun 2003 17:49:34 +1000, "Andy, The Real"
ihatehifitrolls@yahoo.com.au> wrote:

"Craig Rodgers" <craig@student.usyd.edu.au> wrote in message
news:bdcak4$fc$1@spacebar.ucc.usyd.edu.au...
I'm trying to provide network capabilities for an 8 bit micro
(AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the
one
with the onboard ram) made by realtek, it was designed for the ISA bus
and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus,
something
I'm not game to try and drive with an 8 bit micro.



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


The best one i have seen latey is the lantronix part that has the whole
lot
in one RJ-45 socket. Good if your only doing a few, probably not so good
if
you are an OEM. Soanar (polykom) do these parts. Not sure of the cost,
but
I'm guessing they are probably not to badly priced.

Other solution is to use a NE2000 NIC. Dead simple!




The list price for the Lantronix Xport is $49 US.
Been thinking about dropping one of these into my 1xrtt RTU project.

 

[CBFalconer]

Hans-Bernhard Broeker wrote:

.... snip ...

Ah, so now you now about what _everybody_ in the world cares about,
right? ^^^
^

This showed up some latencies here. It took about two minutes to
figure out that your intent was "know". Something about well worn
internal paths

--
Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!

 

[Bernhard Roessmann]

Craig Rodgers wrote:

At the moment the controller I'm looking at using is the RTL8019AS (the one
with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus, something
I'm not game to try and drive with an 8 bit micro.

That's right, most of the 100Base-T chips are designed for the PCI Bus,
but maybe this is what you want:

LAN91C113I
AX88796L

Regards,

--
Dipl.-Ing. (FH) Bernhard Roessmann
Don't Fear The Penguins!

 

[Anton Erasmus]

On Thu, 26 Jun 2003 00:19:59 +1000, "Craig Rodgers"
<craig@student.usyd.edu.au> wrote:

I'm trying to provide network capabilities for an 8 bit micro (AVRmega128)
and was wondering what sort Ethernet controllers people had used?



At the moment the controller I'm looking at using is the RTL8019AS (the one
with the onboard ram) made by realtek, it was designed for the ISA bus and
delivers 10Mbs. Ideally I was looking for a controller that can deliver
100Mbs, but I can only find controllers designed for the PCI Bus, something
I'm not game to try and drive with an 8 bit micro.



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

If 4 or less comcurrent TCP/IP connections is good enough, then the

Wiznet W3100A is a nice device. It runs the TCP/IP stack in hardware,
hence the amount of code to write for a TCP/IP connection is quite
simple. Also because it handles the TCP/IP, the AVR is only bothered
when a packet destined for it's node has been received. They also have
a number of modules available that includes the W3100A IC, together
with the phy-chip and the magnetics + connector.

Regards
Anton Erasmus

 

[Andy, The Real]

"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??