Sign in
Search Comp.Arch.Embedded
embedded by Keywords
68HC11 | 68HC12 | 8051 | 8052 | ARM | ARM7 | Asic | AT91 | AT91RM9200 | Atmel | AVR | AVRStudio | Bootloader | CFP | CompactFlash | Cygnal | Cypress | Dataflash | DSP | eCos | EEPROM | Embedded Linux | Emulator | Endian | Ethernet | Firewire | FPGA | Freescale | GCC | GNUARM | GSM | H8 | HDLC | I2C | Infineon | Interrupts | Java | JTAG | LCD | LED | LPC2000 | MCU | Microchip | MMC | MPLAB | MSP430 | PC104 | PCB | PCI | PCMCIA | PowerPC | Rabbit | RS232 | RS485 | RTOS | SBC | SDRAM | Sensor | SPI | STK500 | UART | UML | USART | USB | Verilog | VHDL | VxWorks | Xilinx
Ads
Discussion Groups
See Also
PCB
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 782 threads matching "pcb"
You are looking at page 1 of 20.
The most relevant threads are listed first
auto-detecting the resolution of HD44780-based LCD modules ?
whygee - 2009-11-11 16:50:00
Hello,
I have hooked alphanumerical LCDs on some uCs in the past and I have
always had to adjust the software to the actually installed module.
I have a small collection of "compatible" displays with 1 to 4 lines
and 8 to 40 char/line so the software could become messy.
In applications or s...
Re: What coding standard are you using for C?
D Yuniskis - 2009-11-07 22:42:00
DJ Delorie wrote:
> D Yuniskis writes:
> > My primary work desktop is 3200x1200. So, if I *wanted* to have
> > 130 character lines, that's not a problem. Why stop at 130?
> > Why not *200*?? :>
>
> My primary desktop is 4960x1600(*) but my editor is only 120 columns.
> If I max...Re: FPGA Soft Core CPUs
-jg - 2009-11-06 04:35:00
On Nov 6, 5:00=A0pm, Jack Klein wrote:
> Parts obsolescence is biting again, and at least one of my EEs is
> insisting that we spin replacement boards with soft-core processors in
> FPGAs.
?? Do you think FPGA's don't go obsolete as well ?
There is a lot more to go wrong in a fpga flo...BARE BOARD PCB TEST QUESTION
Enrico - 2009-10-30 18:20:00
Hi,
I'm routing a PCB.
I'm trying to figure out if I can reduce the number of nails required
by the fixture that my PCB manufacturer will have to build in order to
test the bare boards.
FACTS
----------
The non recurring cost of PCB bare-board test fixtures depends on:
1) The size ...Re: Design Tradeoffs
Paul Carpenter - 2009-10-24 04:21:00
In article ,
tim@seemywebsite.com says...
> On Fri, 23 Oct 2009 17:20:51 +0100, Paul Carpenter wrote:
>
> > Having spent several rounds of initial specifications with a potential
> > customer, that is less likely to be a viable project as they want to
> >
> > "Squeeze a...Re: build an arm board to run linux
emBGeek - 2009-10-23 09:39:00
> I want to build an arm board to run linux. I'm not really interested in
> buying a board and messing around with it. I would go for a schematic
> though. Any pointers on how I could get started? I have heard mixed
advice
> from people. Some say the atmel arm microcontrollers are pretty easy to
...Re: ATE Test: how many push fingers?
Stef - 2009-10-09 11:13:00
In comp.arch.embedded,
Enrico wrote:
> Hi,
>
> I'm routing a board that will be tested by an Automatic Test Equipment
> line.
>
> I purchased and read the "SMTA/TMAG Testability Guidelines TP-101D"
> from smta.org:
> http://www.smta.org/store/book_detail.cfm?book_id=176
>
> T...Premier Farnell has announced an agreement to acquire CadSoft Computer GmbH
bigbrownbeastie - 2009-09-30 10:52:00
Premier Farnell to offer EDA to get closer to engineers
By Peter Clarke
Courtesy of EE Times
(09/24/2009 0:17 PM EDT)
LONDON =97 Component distributor Premier Farnell plc (Leeds,
England) wants to become a supplier of PCB layout software, including
a free-of-charge lightweight ed...Re: UL Certification
Tim Wescott - 2009-09-28 09:53:00
On Mon, 28 Sep 2009 12:39:47 +0200, Stef wrote:
> In comp.arch.embedded,
> Capoccetta wrote:
> > Hi, a customer of ours is asking UL certification of every electronic
> > component used on a device that we have designed (and hopefully will
> > produce) for them. They are not asking fo...Question on Embedded Passive Resistors
Enrico - 2009-09-21 17:48:00
Hi folks,
can anybody explain me what Embedded Passive Resistors are?
I read that they are resistors that can be built during the PCB
fabrication process.
In particular I would like to know:
1) Is it required a special work flow?
2) What are the main advantages and disadvantages compar...Re: Debugging TMS320, Step 1
Olimex - 2009-08-18 02:21:00
On 17 =D0=90=D0=B2=D0=B3, 14:27, "Radly" wrote:
> I maintain the code for a controller based on the TMS320R2811. =C2=A0My s=
ystem
> uses the boot loader to download the execuable code from a host app, so I
> need to know how to set breakpoints after the download is done. =C2=A0Som=
eone
...Re: TFT LCD controller
linnix - 2009-08-10 22:32:00
On Aug 10, 8:13=A0pm, larwe wrote:
> On Aug 7, 2:54=A0pm, news.tin.it wrote:
>
> > > Have you considered an FPGA solution?
>
> > Yes, but we're still looking at it.
> > Any idea?
>
> Well, what are you asking? No I don't have a ready-rolled design in my
> back pocket, tho...Looking for 2-wire to 100mil header cable
larwe - 2009-08-06 21:25:00
I'm looking for a source of the type of cables you find connecting
front panel LEDs to motherboards in PCs. These are two pieces of
stranded wire running to a crimped 2-pin, 100mil female connector that
slides onto 100mil header on the PCB. About 6" wire length would be
ideal, but I can make sho...Interfacing NAND flash to EBI
Nicholas Kinar - 2009-08-03 11:11:00
Hello--
I recently got contacted off-list by someone who is creating an embedded
system with NAND flash and the SAM9XE processor. I'm posting this
solution here on this list to perhaps help others who are interfacing a
NAND flash to an embedded system. This is a solution which has been
...Re: IEEE 1284 (parallel port) slave to USB
linnix - 2009-07-31 08:06:00
On Jul 31, 5:08=A0pm, "delario" wrote:
> actually, just wondering.
> would this also be possible??
> even when data flow is COMING FROM PC???
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A08 data lines =A0 =A0 =A0 USB Dev
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0+ control =A0 =A0 =A0 ...USB 2.0 hub chip
Theo Markettos - 2009-07-31 07:27:00
I want to modify a laptop to fit an internal USB flash drive. While there's
USB available inside all the ports are used, so I need to insert a two port
hub in between one of them so I can break out another connector.
The trouble is space is /extremely/ tight. That means everything will have...Re: Best Value for Schematic Capture & Layout Software ???
D Yuniskis - 2009-07-30 11:28:00
Paul Carpenter wrote:
> In article , not.going.to.be@seen.com says...
> > Hi Paul,
> >
> > [much elided]
> >
> > Paul Carpenter wrote:
> >
> .....
>
> > Some older tools also had problems where certain relationships were
> > expected to exist between your padstack definition...Interfacing S1D13A04 Epson LCD controller chip to Atmel AP7001 EBI
Nicholas Kinar - 2009-07-26 17:13:00
Hello--
I'm in the process of designing a new embedded system using the Atmel
AP700x series of 32-bit embedded processors. There are currently three
processors in this series: (1) AP7000, (2) AP7001, and (3) AP7002. Both
the AP7000 and AP7001 have BGA packages and integrated LCD
contr...Re: RS485 - MODBUS or PROFIBUS or ....
Paul Keinanen - 2009-07-22 14:46:00
On Wed, 22 Jul 2009 07:03:07 -0700, Rumpelstiltskin
wrote:
> Since distance is only 4 feet,
> simplest way is to make a TTL level
> RS232 wire-or'd bus. Just requires
> adding an open collector TTL buffer
> to each transmit line, and resistor pullup.
While wire-ORing some TTL open coll...Re: Ethernet transformer vs. RJ-45
David Brown - 2009-07-17 14:29:00
cs_posting@hotmail.com wrote:
> On Jul 17, 8:35 am, "Joe G \(Home\)" wrote:
>
> > > > I have seen in several layout guidelines that the Ethernet transformer
> > > > should be placed as close to the RJ-45 connector as possible, while the
> > > > close placement of a PHY to the transform...Mains Relay pin-out
Enrico - 2009-07-14 06:43:00
Hi,
I'm looking for a PCB Relay which will switch the Mains to some load.
I noticed that many relays that claims "Max Switching Voltage 250VAC"
have an odd pin-out.
That is, the COMMON terminal passes through the terminals of the
coils:
NC COIL
O O
\ |
...Re: usb camera recommendation
Paul Thacker - 2009-07-10 14:38:00
On Jul 10, 11:27=A0am, larwe wrote:
> On Jul 10, 12:42=A0pm, Paul Thacker wrote:
>
> > I'm looking for a 3Mpixel camera with a usb interface for an embedded
> > application. Any recommendations?
>
> A while ago I used this one, or a very similar model (looks the same
> and is a...Re: ARM (with jazelle) vs Intel Atom for Java apps
2009-07-10 10:16:00
On Jul 10, 8:39=A0am, "shani" wrote:
> We are re-designing a SBC and evaluating different processors.
>
> All application that ran on the previous system has been ported to Java s=
o
> our customer is now facing performance issues.
>
> We are considering Intel Atom, but I am still ...Re: USB Chainsaw
2009-07-10 09:40:00
On Jul 10, 7:50=A0am, "Peter Dickerson"
wrote:
> > some devices (eg PCs running linux) can (optionally) behave like usb
> > devices
> > or like hosts and to connect them (as a device) to another host you'd n=
eed
> > an AM-AM cable,
>
> > I've never tried it, just seen the op...Re: continued fraction program
Paul Keinanen - 2009-06-27 00:49:00
On Fri, 26 Jun 2009 19:27:24 -0500, Grant Edwards
wrote:
> On 2009-06-26, DJ Delorie wrote:
> >
> > nospam writes:
> > > A base unit of 1/12.7E6 inch would give integer representation of 10 micro
> > > inches and 10nm with a bit more than +/-4 meters range from a 32bit int.
> ...Re: continued fraction program
Joel Koltner - 2009-06-26 20:50:00
"Grant Edwards" wrote in message
news:wcSdnUJbyIfx-tjXnZ2dnUVZ_uCdnZ2d@posted.usinternet...
> Seriosly. Are there people using gEDA (or any other CAD
> program) to layout boards bigger then 2m?
And if they are, what software do they currently use? If one can afford to
build 2m PCBs t...PCB prototyping / copper metallization
hex16 - 2009-06-24 22:36:00
I am using A360 PCB mill/drill ( www.accuratecnc.com ) to make my
prototypes.
Lately I need to fabricate small batches (up to 10).
Because of this, I am looking for real copper metallization.
Conductive inks (like ProConduct) of LPKF are not good enough for me.
Is there any body that can recomme...Re: Software Engineering process
larwe - 2009-06-15 13:37:00
On Jun 15, 12:28=A0pm, Vladimir Vassilevsky
wrote:
> > oscilloscope or to prevent a PCB from shorting out on a conductive
> > surface.
>
> LOL !!! That's exactly what I just did with the ESP magazine. The paper
PCB shorting? I believe that purpose, and to provide bedding for my
g...Re: Program in external SDRAM and caching
Frank Buss - 2009-06-14 14:58:00
odi wrote:
> I have a simple program for my AT91RM9200 to turn led on and off. When I
> run it from internal SRAM it works ok, but when I copy it into external
> SDRAM and execute from there it jumps to address 0x2000001c (FIQ vector or
> is it just a coincidence?) instead of 0x2000003c (s...what schematic and component library for FreePCB ?
whygee - 2009-06-11 14:53:00
Hello,
I need to upgrade all my PCB SW and FreeCPB looks OK for me
(even though it forces me to stay on ms-windows).
However it's only an element in the tool chain,
so what free software can work (interactively if possible)
with FreePCB ? I've been using an old EAGLE (the "gratis" version)
t...Re: A siemens C75 lcd-display on an Atmel micro-controller
2009-06-07 07:58:00
On Jun 6, 6:20=A0pm, "R.Wieser" wrote:
> I've just removed the display outof a Siemens C75 phone (which suffered a
> broken "joystick" and is therefore discarded), and would like to connect =
it
> to an Atmel microcontroller.
Getting data can be very, *very* challenging. I use recycle...Looking for a little embedded computer... Gumstix?
Peter - 2009-06-06 05:27:00
I've got the following hardware requirement:
2 x RS232 port
Bluetooth (to talk to a mobile phone)
Ethernet (speed irrelevant)
USB (Controller)
A small qwerty keyboard
A small text LCD
640x480 Video output
NTSC video output
No particular processor power is required
Low power dissipation
...Re: Any experiences running 460 kbaud RS485?
Paul Keinanen - 2009-05-29 05:39:00
On Thu, 28 May 2009 12:27:20 -0700 (PDT), Mike Silva
wrote:
> We're looking at a design that would have 1 RS485 master and 2 slaves,
> with a maximum cable length of 50 meters (25m is more likely), and
> we'd need to run a data rate of 460 kbaud. Since the RS485 spec talks
> about data ra...Re: Availability of 8751
don - 2009-05-15 10:44:00
Scanman wrote:
> I am trying to determine the availabilty of parts on an old design.
>
> It uses 8751H, 8255 and 8254. All are DIP packages.
>
> Can I still by these parts, or should I look for functional repalcements?
>
> If I did go with a different Micro cont. which one would y...Re: Peter Crowcroft.
Antti.Lukats@googlemail.com - 2009-05-15 04:51:00
On May 14, 11:32=A0pm, Don McKenzie wrote:
> Many readers would have been aware of Peter Crowcroft, formerly of
> Tasmania Australia, who set up an Electronics DIY kit business in Hong
> Kong nearly 30 years ago. He passed away in 2005. At the time, I
> reported it here:http://www.dontron...Re: Searching SBC/DSP board/microcontroller; 4ADC/1kHz/USB Host
Yoreki - 2009-05-14 13:23:00
Frank Buss wrote:
> I think the suggestion was to let it act as a USB memory stick (see
"AVR273: > USB Mass Storage Implementation"), because then you don't need
the trouble > of implementing a USB host port yourself and implementing the
access for it, > but you simply plug in this stick in your ...Re: Standard PLC functions in ARM7 ?
-jg - 2009-05-13 19:27:00
On May 14, 1:53=A0am, "lars odlen" wrote:
> We need to design a specific I/O unit with on board Boolean logic. Would =
be
> good to use industry standard PC based PLC programming tools (because the=
y
> are known and existing). =A0
>
> Is there ready firmware for the ARM7 that holds t...Re: homebrew DIY SD-card pinout & driver algorithm ?
Trespasser - 2009-05-09 00:14:00
wrote in message
news:gu0s0j$4fi$1@news.motzarella.org...
> http://uanr.com/sdfloppy tells:
> > You can attach an SD camera memory card to any homebrew DIY
> > project that has a few I/O pins, using ordinary connectors you probably
> > have right now.
>
> > ...an unused 5.25 floppy...Need someone to build simple embedded board
2009-05-07 05:37:00
Hi,
I'm looking for someone with experience to create the hardware for an
embedded controller project.
A very detailed specification is provided. The job includes creating
schematic & PCB layout, and to build 5 prototype units within 3 weeks
from now and 45 additional units shortly after.
...Re: High-speed signals crossing a split-ground
-jg - 2009-05-03 22:34:00
On May 4, 2:06=A0pm, ee_ether wrote:
> Hi,
>
> I'm working a design that has isolation between two sub-systems on one
> PCB (the grounds are separate). =A0One side is a "high-speed" digital
> side with FPGAs and DDR doing DSP and the other side is an analog side
> that has high-resolu...