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PCB
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 692 threads matching "pcb"
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The most relevant threads are listed first
Re: Registration of MAC addresses
Anton Erasmus - 06:50 04-10-08
On Fri, 3 Oct 2008 16:43:28 -0700 (PDT), certsoft
wrote:
> Blip wrote:
> > We are building a product using the LPC2368 (which has a MAC) & a
> > Micrel KSZ8721 (PHY). As part of the prototype programming effort, I
> > include a random MAC address in software as part of an init sequence....
Re: IPC-2581
Brad Velander - 00:53 04-10-08
Rick,
I hear your points but how many successful companies or products are
created by committees? Let alone committees that meet only several times per
year. There is a reason for saying s like a camel is a horse designed by
committee. Yes committees can write the standards but what the I...Taiwanese PCB Manufacturer: how to find it from UL code
10:09 27-09-08
Hi folk,
I got a pcb manufactured in Taiwan.
I can read the UL code on it but don't know how to find the name of
the manufacturer.
any help appreciated,
thanks
Enrico
...Re: AVR tiny13 ADC0 syntax problem
Martin Griffith - 16:42 13-09-08
On Sat, 13 Sep 2008 22:03:54 +0200, in comp.arch.embedded
Frank-Christian Kruegel wrote:
> On Sat, 13 Sep 2008 20:01:44 +0200, Martin Griffith
> wrote:
>
> > > Buy or build one. We will be using the reset pin for ADC or I/O as
> > > well. I know for sure that the core cannot block r...Re: Has anyone heard of corepcb?
TT_Man - 07:47 11-09-08
>
> No idea on corepcb.
>
> Used pcbcart only the once for a couple of simple dspth boards x 50 each.
> V/good price, delivered on time and well packaged, they were good quality
> for my needs. They even promptly answered email enquiries which suprised
> me. HTH.
>
I use pcbcart a...Re: SDR SDRAM 16-bit vs 32-bit
kalyanamsaritha - 18:01 08-09-08
> Absolutely. You will find that your design runs much faster when you
> can put SDRAM on the board. If you can't get the SDRAM you have
> designed in, you won't be able to put it on the board. There is also
> a cost factor.
>
Thanks for the pointer. Yes, this is SDR SDRAM not DDR.
...Re: (New York) Trade ARM9 EVBs for ARM7
linnix - 23:33 28-08-08
On Aug 28, 9:23 am, larwe wrote:
> On Aug 28, 3:28 am, "MK" wrote:
>
> > > question (STR912FW44X6) is at best casually documented and requires a
> > > full day of frustration just to get an LED blinking. So much for
>
> > I can understand that you might not like the board (I h...Easiest Way To Get Part Library Templates For Pcb?
andersod2 - 21:18 28-08-08
Hey all,
One thing I'd like to know, and like to hear what you have to say
about is how to accomplish a uniform / "easy" way of doing the
following:
(1) Obtaining information about whether a particular part is mass-
produceable
(3) Obtaining the datasheet ( digikey/mouser are good for this...Re: Orcad is a total piece of dog crap!
16:05 26-08-08
Joerg writes:
> http://www.geda.seul.org/mailinglist/geda-user34/msg00089.html
Note that that message is 3.5 years old. It also says that PCB is
unix-only and requires X11, neither of which is currently true.
> The main reason we are windows-centric is that a lot of stuff we
> have...Re: eee pc? no eee box!
Lewin A.R.W. Edwards - 21:11 19-08-08
rickman wrote:
> > You're kidding, right? No two of those are the same, and the shelf
> > life of any given model is about twenty minutes. You need a pretty big
> > physical envelope, and some innovative anti-vibration strapdown
> > system, to be able to accept any arbitrary USB disk.
>
...Re: Affordable PCB Layout Software ??? Sprint-Layout
James Arthur - 19:22 13-08-08
john jardine wrote:
> As it happens, I've just finished a design for an industrial test unit and
> not looking forward to building up a prototype for demonstrating.
> The prog' has proved easy to use, so thought I'd quickly lay down two
> relays and a connector strip on a PCB, as t...Re: embedded processor with large memory support
Hans Odeberg - 03:12 08-08-08
On 8 Aug, 00:46, tns1 wrote:
> I have been looking at current mainstream 32bit embedded processors for
> my project (ARM, cortex, PPC, coldfire, etc). I would sure like to find
> a single device that has most of what I need, but I am running out of
> places to look. The main problem is me...Re: I need 1 USB to many RS232 Convertor?
=?ISO-8859-1?B?9m1lcmthcmFr/Of8aw==?= - 02:05 07-08-08
> Tons of USB to multiple RS-232 Ports.
> I did a quick Google and this was the top hit:
>
> http://www.usbgear.com/USB-Serial.html
thank but these are boxed soulutions. i have to do this on a part of
my own PCB design so i need IC like solutions.
...Re: Embedding BScan with the DUT
colin_toogood@yahoo.com - 03:59 05-08-08
On 5 Aug, 07:55, DFT_noob wrote:
> Hello,
> Im a student doing some under-graduate work for my final year project.
> It involves moving Bscan functionality onto the board so we kind of
> augment the DUT with some hardware for test purposes (remote testing
> is a big incentive to move to...Re: raisonance plus Rlink - any issues?
Anton Erasmus - 17:09 01-08-08
On Thu, 31 Jul 2008 23:19:11 +0100, Peter Harrison
wrote:
> I am still trying to sort out a set of tools for the STM32 (and possibly
> other ARM processors). I know there have been several discussions on
> here. I have very little money as I am essentially a hobby user.
>
> Raisonance ...Re: Variable reluctance motor drive?
John Speth - 11:57 31-07-08
wrote in message
news:74a922b3-8485-4569-a99b-81517d94de63@34g2000hsf.googlegroups.com...
> On Jul 30, 8:36 am, "John Speth" wrote:
> > Hi group-
> >
> > I've been experimenting with various stepper motor samples for personal
> > education. One of my motor samples is what I'm pr...Re: Connecting FLASH memory device on printed circuit board
qrk - 13:43 25-07-08
On Wed, 23 Jul 2008 17:17:59 +0200, "Norman Bollmann"
wrote:
> Hi everyone,
>
> I am new to the board design and stuff so please excuse me for asking
> questions that may be selfevident... ;-) What I want to do is to connect an
> Intel StrataFlash (or compatible) linear flash memory de...Re: 32-bit Microcontroller for $1.00
Jim Granville - 15:47 23-07-08
rickman wrote:
> On Jul 22, 7:09 pm, Jim Granville
> wrote:
>
> > Wilco Dijkstra wrote:
> >
> > > "Jim Granville" wrote in messagenews:4884e753$1@clear.net.nz...
> >
> > > > Conclusion: Yes the M3 is significant, but it is a
> > > > _very_ long way from dominating the MCU market...Re: Finding power - gnd shorts
13:49 22-07-08
On 22 Jul., 18:30, rickman wrote:
> I have a small module that is shorted between the +12 volt plane and
> ground. I am having a hard time finding where the short is so it can
> be fixed.
>
> The bare boards were supposed to be tested, so I don't suspect the
> board itself. I have v...Mini USB cable with all 5 pins + shield = 6 wires?
12:54 22-07-08
Due to a PCB "oops" in an embedded project, I'm wondering if anyone
knows where to buy mini-usb cables with all 5 pins plus the connector
shield wired through.
I saw some indication that a motorola bar code scanner might have used
the connector for RS232 and used all the wires, but am not doin...Ethernet Terminal I/O board
trex - 08:38 21-07-08
Hi everybody,
I am trying to make a ethernet terminal I/O board. Basically making an x86
based 1U solution. I am trying to route the onboard ethernet connection via
a patch cable (Cat6). this works but I also want the link/status leds.
I did a simple PCB with two modular 8P8C Jacks with LEDs a...Re: Challenge: Motorola SC85370P
Clint Sharp - 12:28 08-07-08
In message , Michael A.
Terrell writes
> I know exactly what it is. Pure unobtanium. The 'SC' prefix is a
> proprietary marking for a big OEM customer, so the only way to get
> information is to squeeze it out of that OEM.
>
>
But knowing what it's on, what package etc. might be ...Re: RS422 interface
Paul Keinanen - 04:44 08-07-08
On Mon, 07 Jul 2008 13:53:32 -0500, Grant Edwards
wrote:
> On 2008-07-07, Paul Keinanen wrote:
> > On Mon, 07 Jul 2008 12:15:17 -0500, "svyamuna"
> > wrote:
> >
> > > I am trying to interface two systems through RS422 link. There are only
> > > four lines connected between them ...Re: Embedded processor selection for long-life product
Jim Granville - 05:01 06-07-08
tns1 wrote:
> I am faced with selecting a replacement processor/uC for a re-design of
> some industrial controller/safety equipment. The technical requirements
> can be satisfied by just about any 32bit risc style uP/uC, but one key
> requirement is that since the product life is decades ...Re: Laptop for engineering without OS
Paul E. Bennett - 08:03 05-07-08
rickman wrote:
> I would consider used equipment, but I want something that will last
> as my needs for processor speed and especially memory grow. 1 GB is
> not enough on my desktop machine currently, so I don't know why it
> would suffice in a laptop. It is not cost effective to buy a ...Re: Good SVN client?
ChrisQ - 14:01 03-07-08
David Brown wrote:
> Once you've figured out what protocol your server will run, use that
> same protocol on the client.
David,
Thanks for the detailed reply. Have been plugging away at it again today
and (with help from the red book) have the following configuration at
the serv...Re: AC spike go pass XFRM and regulator to reset CPU [Part 2]: It is irradiated?
Paul Keinanen - 03:35 03-07-08
On Thu, 03 Jul 2008 06:44:01 GMT, "Rodo" wrote:
>
> "Paul E. Bennett" wrote in message
> news:6d1sntFe5u3U1@mid.individual.net...
> > Scope probes are usually very high impedance and it is not unusual for an
> > open probe to pick up noise from everywhere. You need a sound approac...PCB Manufacture in UK
ratemonotonic - 17:59 29-06-08
Hi All ,
Lately I came across an american service called ExpressPCB , that has
its own CAD software and after laying out the PCB , you can use the
software itself to order board manufacture. The software can be used
to generate BOM and specify Part number from Digikey. This is
brilliant seaml...Re: tiny inductor with every bypass cap?
BobW - 01:05 22-06-08
"Talal Itani" wrote in message
news:suk7k.3904$JL.2049@trnddc05...
> >
> > To be honest 50uH and 0.1uF is a recipe for disaster. At the most a
> > ferrite SMT-bead should be used but usually I don't even do that. A nice
> > full ground plane and a nice full VCC plane is usually bes...Re: which oscilloscope?
Jim Granville - 23:43 21-06-08
Talal Itani wrote:
> > Then you may be better with TWO scopes. Get a good, cheap (second hand?)
> > analog one with as many MHz as you can afford, and then get a Digital
> > Multi-channel one, with some analog features, but 25MHz digital rates are
> > not great.
> > [ie 100MHz-200Mhz Digital...Re: The Right PCB House
Tim Wescott - 11:48 21-06-08
Talal Itani wrote:
> Hello,
>
> I need to have a 4-layer board made, a prototype, 2 boards, nothing fancy.
> I did some research in this newsgroup and I narrowed it down to Sierra Pro
> Express, ExpressPCB, and AC Advanced Circuits. Do you think I made the
> right choice? Do you ha...Re: Identify microprocessor from code.
donald - 21:00 19-06-08
> > Hi,
> > I want to identify a microprocessor from the code because
> > I dont have the micro number. This micro uses an EPROM 27C4001.
> >
> >
> > The micro has the part number B4F2398 but I can not find it
> > on the web.
Ok, so whats on the outside of the box.
Did you just ...Re: embedded system development environment
vinnie - 15:14 18-06-08
> Hi All,
>
> I am new to embedded system development and need your advice on my
> upcoming project. I thank and appreciate your help in advance.
>
> I'd like to setup a development environment that includes a
> microprocessor which supports output to LCD as well as input/output
> based on...Re: How workable is Vista?
rickman - 22:58 16-06-08
On Jun 16, 9:09 pm, Tom=E1s =D3 h=C9ilidhe wrote:
>
> I'd switch to Mac myself but I'm just a bit... eh... set in my ways. I
> tried to switch to Linux but I jut got pissed off with the bugs and
> lack of functionality and now I've pretty much given it the boot.
> There's projects runni...Re: Flash retention in uC at higher temps, experience?
TheM - 07:03 15-06-08
"Jim Granville" wrote in message news:48548d1f$1@clear.net.nz...
> TheM wrote:
> > It could be a design with long supply wires (as antennas) and poor RF
> > blocking caps close to uCPU.
> >
> > Flash corruption due to EM field at 6 feet distance sounds a bit far fetched.
>
> It will...Re: Bounceless switches?
ghelbig - 00:46 14-06-08
On Jun 13, 9:09 pm, rickman wrote:
> I was trying to measure the bounce time of a tactile switch so that I
> could design a debounce circuit based on a timer. But when I look at
> the switch output on a scope, I don't see *any*! The output is as
> clean as it gets and does not show boun...Re: Adding USB thumb-drive support to existing product
larwe - 20:56 11-06-08
On Jun 11, 7:22=A0pm, "d...@nadler.com" wrote:
> Anybody got an alternate uC they'd suggest, which
> includes all of the above, is available in eval/
> devel boards including USB host, has conventional
You don't strictly need host, you can use OTG... Look at the Freescale
Flexis parts...Re: Adding USB Interface to Low-Cost 8-Bit Microcontroller
Andrew Smallshaw - 10:48 11-06-08
On 2008-06-10, David T. Ashley wrote:
>
> However, what is required to implement a USB interface in the product (for
> an 8-bit microcontroller), and what is required as far as a driver on the PC
> side? The goal would be that we distribute a re-FLASHing application to the
> custome...Re: What Serial Link to use
Anton Erasmus - 11:40 09-06-08
On Mon, 09 Jun 2008 05:20:15 -0500, "Jalon"
wrote:
> Hi All,
>
> I am a novice in Embedded and looking for inputs on the Basic
> characteristics of serial protocols that will help me in deciding which
> protocol to use (SPI/SCI,I2C..... RS485, RS432).
>
> In other words i find easy t...length compensation for RocketIO channels
Denkedran Joe - 11:31 06-06-08
Hi there,
I'm designing a PCB that incorporates a Virtex4 FX60 with 16 RocketIOs. All
RocketIOs function only as a receiver and I wonder if you should care for
length compensation on my FR4 board, anyway. The reason I am not sure is
that in my opinion each RocketIO synrchonizes itself indep...