I use the attached Makefile for schematic management, and then "make
printpdf" to create a PDF (currently set to make A4 size pages).
Makefile
Description: Binary data
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John -
On Tue, Oct 28, 2008 at 10:11:38PM -0500, John Griessen wrote:
> Larry Doolittle wrote:
> > I have seen exactly one case where a "split" (very carefully done)
> > on the ground plane was needed to avoid a source of ground return
> > crosstalk.
> I'd like to hear more about that, if you w
Larry Doolittle wrote:
> All modern PCs come with high efficiency DC-DC converters
> built-in. They just get fed from rectified line voltage.
> Feed them 300VDC (from the aforementioned PF corrected
> front end) and they work much better. At least that's
> what some server farms have started doi
> I think the best way to use in or out symbols for offpage connectors
> is if they are "inert", that is, they don't have netname= attribs
> attached.
The ones I use are purely graphical. You actually attach the netname
attribute to the net, not the symbol, but position it so that it looks
like
DJ Delorie wrote:
>> In my 20+ years in engineering I have yet to see one case where
>> splitting a ground plane under high-speed ADCs has worked.
>
> What about high precision ADCs? I'm working on a design using ADE7753
> power monitor chips (16-bit ADCs) , and their own app note (AN564)
> shows
Rob Butts wrote:
>I have a multi-page schematic. I named the schematic according to the
>gschem guidelines name_pg#.sch. If I want to have a net go to
>multiple components on multiple pages and be recognized by gsch2pcb
>can I use the in/out symbols in input/output (generic) menu?
Dave McGuire wrote:
> On Oct 28, 2008, at 8:45 PM, Joerg wrote:
If I ever get back to working on an open source PDA I will be
sure to
include a crane hook.
>>>PDA == "Preposterous Digital Assistant" =)
>> By now I'd say "Prehistoric Digital Assistant". The only guy I know
>>
On Wed, 29 Oct 2008 00:16:22 +0100, Stefan Salewski wrote:
> As Kai-Martin reports recently on this list:
Plus, I included the various way in in the gschem-faq:
ttp://geda.seul.org/wiki/geda:faq-gschem#how_can_i_produce_pdf_output
---<(kaimartin)>---
--
Kai-Martin Knaak
http://lilalaser.de/blo
On Oct 28, 2008, at 8:45 PM, Joerg wrote:
>>> If I ever get back to working on an open source PDA I will be
>>> sure to
>>> include a crane hook.
>>
>>PDA == "Preposterous Digital Assistant" =)
> By now I'd say "Prehistoric Digital Assistant". The only guy I know
> who
> actually still uses
On Tue, Oct 28, 2008 at 6:54 PM, Steve Meier <[EMAIL PROTECTED]> wrote:
> If I ever get back to working on an open source PDA I will be sure to
> include a crane hook.
>
> Steve Meier
>
Ah, so that's what the hole in my Freerunner is for.
http://www.openmoko.com/product.html
--
Mark Rages, Engi
Joerg <[EMAIL PROTECTED]> writes:
> By now I'd say "Prehistoric Digital Assistant". The only guy I know
> who actually still uses one is our pastor.
I have one I use every day, but it's in my watch.
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Dave McGuire wrote:
> On Oct 28, 2008, at 7:54 PM, Steve Meier wrote:
>> If I ever get back to working on an open source PDA I will be sure to
>> include a crane hook.
>
>PDA == "Preposterous Digital Assistant" =)
>
By now I'd say "Prehistoric Digital Assistant". The only guy I know who
act
On Oct 28, 2008, at 7:54 PM, Steve Meier wrote:
> If I ever get back to working on an open source PDA I will be sure to
> include a crane hook.
PDA == "Preposterous Digital Assistant" =)
-Dave
>
--
Dave McGuire
Port Charlotte, FL
___
If I ever get back to working on an open source PDA I will be sure to
include a crane hook.
Steve Meier
On Tue, 2008-10-28 at 19:51 -0400, Dave McGuire wrote:
> On Oct 28, 2008, at 7:41 PM, Joerg wrote:
> >>> Well, 23MWh is huge. Unless you guys heat with electricity.
> >>> Computers
> >>> wil
http://www.analog.com/en/interface/digital-isolators/ADUM5401/products/product.html
DONE
On Oct 27, 2008, at 8:39 AM, Stefan Salewski wrote:
> Sometimes it is necessary/recommended to partition (separate) power or
> ground planes, i.e. for ADC or DC/DC-Converters, see page 16 and 17 in
>
> http:
On Oct 28, 2008, at 7:41 PM, Joerg wrote:
>>> Well, 23MWh is huge. Unless you guys heat with electricity.
>>> Computers
>>> will be a mere drop in the bucket there.
>>
>>Are you sure? Real computers have wheels. ;)
>>
>
> Nah, real computers like the ones my pa dealt with have hooks on
> t
Dave McGuire wrote:
> On Oct 28, 2008, at 7:21 PM, Joerg wrote:
>> Well, 23MWh is huge. Unless you guys heat with electricity. Computers
>> will be a mere drop in the bucket there.
>
>Are you sure? Real computers have wheels. ;)
>
Nah, real computers like the ones my pa dealt with have hook
> That's going to be more serious work. Holding tanks, fine control of
> pressure and so on.
Well, it's more like "oh, the well uses X kwh, can't do anything about
that".
> Oh, and if you have teenage girls tell them that the daily shower does
> not have to exceed 30 minutes/person ;-)
I have
On Oct 28, 2008, at 7:21 PM, Joerg wrote:
> Well, 23MWh is huge. Unless you guys heat with electricity. Computers
> will be a mere drop in the bucket there.
Are you sure? Real computers have wheels. ;)
-Dave
--
Dave McGuire
Port Charlotte, FL
___
On Tue, Oct 28, 2008 at 07:07:18PM -0400, John Luciani wrote:
> On Tue, Oct 28, 2008 at 6:53 PM, DJ Delorie <[EMAIL PROTECTED]> wrote:
> >> Don't you have a number of PCs running 24x7?
> > Yup, at least six of them.
> If you need another fun project ---
>
> Rack mount power distribution box with a
DJ Delorie wrote:
>> Another nice tool: Maybe you could borrow a FLIR camera. That would
>> show every ever so slight hot spot in a room, like something that
>> consumes a couple of watts of standby power but has long since been
>> forgotten.
>
> That won't help me figure out how often the well pu
> I haven't heard of a power factor requirement for a residence.
I was referring to businesses, which often have enough inductive
motors to cause problems.
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On Tue, Oct 28, 2008 at 7:11 PM, DJ Delorie <[EMAIL PROTECTED]> wrote:
>
>> I believe the utility charges for Volt-Amperes (VA).
>
> Nope, they charge for real watts.
>
> If your PF is too far from 1, they make you install capacitors
> (usually, or inductors) to balance your load to keep the PF nea
> True, but a lot of the the electric company's so-called "watt-hour"
> meters are actually "amp-hour" meters, or at least they used to be.
Well, mine is the aluminum wheel type, which only measures real power.
If you have a digital meter, they can charge you for whatever they
feel like measurin
Am Dienstag, den 28.10.2008, 21:34 + schrieb Peter TB Brett:
>
> If you use KDE, try putting the following in the "print command" field:
>
> kprinter
>
> Usually "Mail PDF File" is one of the "printer" options available (it has
> many
> *many* other useful options).
>
As Kai-Martin rep
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of DJ Delorie
> Sent: Tuesday, October 28, 2008 6:54 PM
> To: geda-user@moria.seul.org
> Subject: Re: gEDA-user: pcb, howto partition power planes?
>
>
> > You may want to check power factor.
>
> Perhaps
> I believe the utility charges for Volt-Amperes (VA).
Nope, they charge for real watts.
If your PF is too far from 1, they make you install capacitors
(usually, or inductors) to balance your load to keep the PF near 1.
It doesn't change your electric bill, though.
On Tue, Oct 28, 2008 at 6:53 PM, DJ Delorie <[EMAIL PROTECTED]> wrote:
>
>> You may want to check power factor.
>
> Perhaps you're thinking of power efficiency? You don't pay for power
> factor problems (imaginary power).
Efficiency is probably low. Power factor is probably low too.
I believe the
> You may want to check power factor.
Perhaps you're thinking of power efficiency? You don't pay for power
factor problems (imaginary power).
> Don't you have a number of PCs running 24x7?
Yup, at least six of them.
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On Tue, Oct 28, 2008 at 5:31 PM, DJ Delorie <[EMAIL PROTECTED]> wrote:
>
> At the moment, though, I don't have any idea where the
> power is going. I suspect my computers are eating a big chunk, but
> there are a LOT of other things in the house that are suspect.
You may want to check power facto
For non-hierarchical schematics all nets that have the same net name
attributes will be connected.
Steve Meier
On Tue, 2008-10-28 at 18:13 -0400, Rob Butts wrote:
> I have a multi-page schematic. I named the schematic according to the
>gschem guidelines name_pg#.sch. If I want to have a net
I have a multi-page schematic. I named the schematic according to the
gschem guidelines name_pg#.sch. If I want to have a net go to
multiple components on multiple pages and be recognized by gsch2pcb
can I use the in/out symbols in input/output (generic) menu? Can I
name the nets
On Tuesday 28 October 2008 22:04:17 DJ Delorie wrote:
> > I need to have a surfacemount part rotated 15 degrees from another part
> > on my board.
> >
> > The rotate tool rotates by 90 degrees, how do I do arbitrary rotations?
>
> Cut the part to the paste buffer.
>
> :FreeRotateBuffer(15)
This is
Nearly impossible? I disagree here it is standard practice.
Analog signals come in and go out the left side of the board and digital
is in the center to the right side.
Top analog is separated from the bottom analog.
Here is the deal. We start with a signal less the one milli volt and we
increas
> I need to have a surfacemount part rotated 15 degrees from another part on my
> board.
>
> The rotate tool rotates by 90 degrees, how do I do arbitrary rotations?
Cut the part to the paste buffer.
:FreeRotateBuffer(15)
Paste it back down.
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ge
I need to have a surfacemount part rotated 15 degrees from another part on my
board.
The rotate tool rotates by 90 degrees, how do I do arbitrary rotations?
Thanks,
Sean
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On Tuesday 28 October 2008 21:26:24 Rob Butts wrote:
> I want to print schematics to files so I can email them to someone AND
> they'll need to print them. I noticed printing to a file is in the form of
> a .ps. Can I convert this to a pdf or a more common file type?
If you use KDE, try putting
> Another nice tool: Maybe you could borrow a FLIR camera. That would
> show every ever so slight hot spot in a room, like something that
> consumes a couple of watts of standby power but has long since been
> forgotten.
That won't help me figure out how often the well pump runs. It's 480
feet d
On Tue, Oct 28, 2008 at 5:26 PM, Rob Butts <[EMAIL PROTECTED]> wrote:
>
> I want to print schematics to files so I can email them to someone AND
> they'll need to print them. I noticed printing to a file is in the
> form of a .ps. Can I convert this to a pdf or a more common file
> type?
I want to print schematics to files so I can email them to someone AND
they'll need to print them. I noticed printing to a file is in the
form of a .ps. Can I convert this to a pdf or a more common file
type?
Thanks
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Joerg -
On Tue, Oct 28, 2008 at 02:07:30PM -0700, Joerg wrote:
> Tried to load your layout but got an error and I could not find any
> pointers via web search.
>
> Error parsing file ...
> line: 801
> description: font position out of range
I hit this too. I just deleted the Symbol that tarts
DJ Delorie wrote:
>> I guess your layout will need at least one more rev before you
>> can get to the noise limit of that chip. OTOH, maybe that isn't
>> the goal.
>
> My goal is: figure out why my electric bill is so high :-)
>
Another nice tool: Maybe you could borrow a FLIR camera. That woul
yes it helps immensely to have a low pass filter issolating a device
from the power planes.
Steve Meier
On Tue, 2008-10-28 at 14:49 -0400, DJ Delorie wrote:
> > In my 20+ years in engineering I have yet to see one case where
> > splitting a ground plane under high-speed ADCs has worked.
>
> Wh
I won't argue this point. I will refer every one to an Analog Device
publication "High Speed System Applications" copyright 2006 ISBN-10:
1-56619-909-3 or ISBN-13: 978-1-56619-909-4
In particular if you get a copy of this book (and they gave me mine)
look at pages 4.15 and 4.16
There AD recommen
> I guess your layout will need at least one more rev before you
> can get to the noise limit of that chip. OTOH, maybe that isn't
> the goal.
My goal is: figure out why my electric bill is so high :-)
> I do really like the idea behind that board! I have a Kill-A-Watt
> at home. It's really
Stuart Brorson wrote:
[...]
> Therefore, the folks at National Semiconductor push the idea that you
> place analog and digital components as far away from one anther as
> possible on your board. Also, keep analog and digital signal tracks
> as separated as possible. But use a *single* solid gro
DJ -
On Tue, Oct 28, 2008 at 12:49:51PM -0700, Larry Doolittle wrote:
> Your board looks decent. What kind of voltage resolution are you
> looking for (e.g., what IC are Uxx0)?
I see now, ADE7753ARSZ, $3.834 in 25's at DigiKey. 16-bit Sigma-Delta
under the hood. Good luck with that.
> The fir
> Your board looks decent. What kind of voltage resolution are you
> looking for (e.g., what IC are Uxx0)?
Those are the ADE7753 chips. In theory, they're accurate enough to
meet all the IEC standards for power metering, but in my case, I only
need to know where all my kWh are going so I know w
DJ -
On Tue, Oct 28, 2008 at 03:09:37PM -0400, DJ Delorie wrote:
> > App notes and example designs are special cases: there is only
> > one chip straddling the analog and digital divide. If you have
> > more than one (e.g., both an ADC and a DAC) all those ideas
> > pretty much go out the window,
DJ Delorie wrote:
>> In my 20+ years in engineering I have yet to see one case where
>> splitting a ground plane under high-speed ADCs has worked.
>
> What about high precision ADCs? I'm working on a design using ADE7753
> power monitor chips (16-bit ADCs) , and their own app note (AN564)
> shows
On Tue, Oct 28, 2008 at 02:49:37PM -0400, DJ Delorie wrote:
>
> What about high precision ADCs? I'm working on a design using ADE7753
> power monitor chips (16-bit ADCs) , and their own app note (AN564)
> shows a ferrite isolating analog ground, and a 10R resistor isolating
> AVdd.
http://www.am
> App notes and example designs are special cases: there is only
> one chip straddling the analog and digital divide. If you have
> more than one (e.g., both an ADC and a DAC) all those ideas
> pretty much go out the window, and you're better off with a
> single ground plane.
I have 16 of these
>> Sometimes it is necessary/recommended to partition (separate) power or
>> ground planes, i.e. for ADC or DC/DC-Converters, see page 16 and 17 in
>>
>> http://focus.ti.com/lit/ug/slwu028c/slwu028c.pdf
>>
>> We can do this in pcb program with (adjoining) polygons.
>> Disadvantage is, that if we ch
On Tue, Oct 28, 2008 at 02:49:37PM -0400, DJ Delorie wrote:
>
> > In my 20+ years in engineering I have yet to see one case where
> > splitting a ground plane under high-speed ADCs has worked.
>
> What about high precision ADCs? I'm working on a design using ADE7753
> power monitor chips (16-bit
> In my 20+ years in engineering I have yet to see one case where
> splitting a ground plane under high-speed ADCs has worked.
What about high precision ADCs? I'm working on a design using ADE7753
power monitor chips (16-bit ADCs) , and their own app note (AN564)
shows a ferrite isolating analog
Stefan Salewski wrote:
> Sometimes it is necessary/recommended to partition (separate) power or
> ground planes, i.e. for ADC or DC/DC-Converters, see page 16 and 17 in
>
> http://focus.ti.com/lit/ug/slwu028c/slwu028c.pdf
>
> We can do this in pcb program with (adjoining) polygons.
> Disadvantage
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