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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 682 threads matching "pcb"
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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...Affordable PCB Layout Software ???
Blackwater - 11:27 30-07-08
Um ... has there been some kind of conspiracy at work over
the past few years to totally drain the marketplace of
decent PCB layout/routing software ???
Circuitmaker, Protel, Traxmaker ... the sub-$200 kind of
goodies that combined all the good features with intuitive
no-BS interfaces - gon...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...Re: Luminary Micro and sales
Jim Granville - 21:17 05-06-08
Bob Berman wrote:
> We want to buy Luminary Micro microcontrollers for strategy products. But
> Luminary website not have company sales. Please, where is annual report of
> Luminay micro to show company sales?
They are too new for that :)
Designs take a while to ramp to sales, and th...Re: Simulation of Microcontrollers
06:04 05-06-08
On 5 Jun, 11:00, "arslan" wrote:
> I have been working on microcontrolers like 8051 and intel's 80c196.
> I have never simulated microcontrolers before starting development,
> however I know that Proteus can be used to simulate 8051 and few other
> uControllers.
>
> Can Orcad be used ...Re: ST Microelectronics STM8 Programmer?
DaveN - 15:27 04-06-08
"David T. Ashley" wrote in message
news:U-mdnQqFHb4xJtvVnZ2dnUVZ_h_inZ2d@giganews.com...
> We are contemplating using the STM8 for a high-volume automotive
> application.
>
> We haven't been able to find a good end-of-line programming solution. We
> typically program our microcontr...Re: Material Choice for Portable Sound Player
donald - 11:00 01-06-08
Hoi Wong wrote:
> Thanks for the comments to my post below. It seems like I wasn't clear about
> the needs for the project when I ask for suggestions on component choice.
> Instead of continuing the thread below, let me start fresh here.
>
> I'm trying to build a portable, low power sou...Re: microscope recommendations
Rich Webb - 08:12 23-05-08
On Fri, 23 May 2008 15:06:43 +0800, "Den"
wrote:
>
> wrote in message news:g14vh3$6sl$1@reader2.panix.com...
> > Anyone use a television with a close-up camera in place of a microscope?
> > If so, how well does it work compared to a microscope?
> >
> > Hul
> >
>
> I tend to ...Re: adding USB Flash feature to existing product (Vinculum? experience?)
Peter Dickerson - 10:13 14-05-08
"Mike Harrison" wrote in message
news:1jnl24paq0i74b6vj6hckvlg9rkb7pbg45@4ax.com...
> On Wed, 14 May 2008 10:01:11 +0100, "Peter Dickerson"
> wrote:
>
> > I'm looking into adding support for USB Flash sticks to a current design,
> > perhaps even for retrofit. The product volumes are...Re: My idea of fully-portable C code
linnix - 14:29 13-05-08
On May 13, 11:20=A0am, Tom=E1s =D3 h=C9ilidhe wrote:
> On May 13, 7:15=A0pm, linnix wrote:
>
> > > If you have 12 pins and you need to perform 14 different functions,
> > > then surely it's not "meaningless" to try to save pins.
>
> > > If your data memory has been exceed by ...Re: uC Slection for a learner project
linnix - 11:38 04-05-08
On May 4, 2:03 am, Jim Granville
wrote:
> linnix wrote:
> > On May 3, 12:45 pm, Roland Latour wrote:
>
> > > The response (trimmed) below, sounds great, but who is "We" mentioned
> > > just before item 7 below? I checked 'linnix.info-for.us' but that URL
> > > is 'Parked'. So whe...Re: Task priority for UI task handling menus and other controls
Dave - 13:52 03-05-08
Jim Granville wrote:
>
> Another trend is multiple chips. You do NOT see a modern car trying
> to run everything from one chip (even tho Bill Gates might try that!)
Actually, you do. The fewer chips the less cost (lower PCB area, fewer
chip interconnects and solder joints, faster assemb...Re: Driving a led without a series resistor (PWM technique)
06:01 30-04-08
On 30 Apr, 09:20, "MK" wrote:
> wrote in message
>
> news:9fec5662-5499-46e6-a5ee-d36bf6079e86@k37g2000hsf.googlegroups.com...
>
>
>
> > Hi,
>
> > I'm designing a board where the microcontroller is supposed to drive
> > 10 red leds and 4 optocouplers.
>
> > I would ...