HI Adeel
Wave soldering is only choice for soldering through hole parts in bulk. You
can potentially save money by putting SMD parts on the opposite side to the
thru hole parts and solder them all in one go. Wave soldering is not as
reliable as reflow however, and requires adherence to fairly res
Linden,
It maybe a 2SC1623 or 2SC2812 NPN device.
This info is from the book:
Up-To-Data Worlds
Transistors & IC'c
It has listings with the device markings.
Darren Moore
> -Original Message-
> From: Linden Doyle [mailto:[EMAIL PROTECTED]]
> Sent: Friday, 31 May 2002 15:07
> To: PEDA
Most Board-Population vendors use two techniques for soldering namely Wave
Soldering and Reflow Soldering. Can someone tell me about the pros and cons
of each type (which type is better for High-density and High Performance
boards) ?.
Regards
ADEEL MALIK,
* * * * * * * * * * * * * * * * * * * *
Hello,
There is at least one layout package I know of that will report "dangling lines" and
their x:y coordinates. Also, I have been told that running the database through
Specctra will remove dangling lines. Though I have never witnessed the process, it
might be worth looking into.
Cheers
Could someone comment on what is the advantage of using .Designator string
as opposed to default component Designator? You can move default Designators
to any track or mechanical layer, position them automatically and resize to
fit into or next to a component. Doing that with the .Designator strin
It's been a while since I've installed Protel, but from memory: Schematic
editor Preferences/Graphical Editing/Convert Special Strings is not checked
by default. So you will see things like '.DATE'instaed of the current date.
'Add template to clipboard' (in Schematic editor Preferences/Graphical
This was just cutting and pasting a section of column to try and remove those
pesky underscore characters pcb adds when building arrays. It caused an
exception error when I tried pasting back the updated designators into Protels
spreadsheet. It suggested it was good practice to reboot after this
Ivor,
Sure there is one very important thing to do..
Make sure you never loose where this list is :)
Darren
> -Original Message-
> From: Ivor Davies [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, 30 May 2002 02:09
> To: Protel Forum Ask (E-mail)
> Subject: [PEDA] Good default settings
>
thank brad and mike
i know some reps well but the customer will be shopping it offshore
an inquiry like this to the reps will make my phone ring too much (BTDT)
info on FR1 was v interesting
Dennis Saputelli
Mike Reagan wrote:
>
> Dennis,
>
> Check with some of your manufacture's reps in yo
I've only seen that capability in some of the gerber softwares. The old
Lavenir View2001 does an unterminated trace check but Camtastic doesn't seem
to have the ability.
Ian Capps
- Original Message -
From: "John W. Childers" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
On 10:14 AM 30/05/2002 -0400, Abd ulRahman Lomax said:
>At 01:14 PM 5/29/2002 +1000, [EMAIL PROTECTED] wrote:
>
>
>>I just discovered another 'bug' fix for the spreadsheet editor. It always
>>seems
>>to default to locked and therefore any update you try to paste back from
>>Excel
>>(a usable spr
I'm not sure about Camtastic but my CAM350 software will check for unwanted
antennas. Sorry not much help here.
- Original Message -
From: "John W. Childers" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, May 29, 2002 1:07 AM
Subject: [PEDA] Systematically
Dennis,
as per UL, yes you are right, there are many consumer products which
use phenol boards. Just for your reference, FR1 is a phenol board but with
the addition of flame retardants.
There are typically three manners to achieve UL for laminate
materials. 1) Flammability rating
thanks for your comments, we hope to do a no via design
i hadn't thought about the flammability, will look into that
but lots of UL/CE products use phenolic bds
Dennis Saputelli
Brad Velander wrote:
>
> Dennis,
> while you state this is a single etch layer design, I assume that
> you h
At 11:07 PM 5/28/2002 -0600, John W. Childers wrote:
>On a revision of a board, unwanted antennas can remain and must be found
>and removed. These are tracks that branch out from a net, but don't
>terminate on a pad, and can generate noise as electromagnetic waves, much
>like an antenna on a r
Dennis,
while you state this is a single etch layer design, I assume that
you have vias. Am I right? Phenolic or CEM1 will not electroplate reliably
or at least not without contaminating the plating bath with phenols. If you
are doing the silver via epoxy process then forget the above comm
Hi Steve,
Thanks for the reply; I will use this.
John
- Original Message -
From: <[EMAIL PROTECTED]>
To: Protel EDA Forum <[EMAIL PROTECTED]>
Sent: Thursday, May 30, 2002 6:32 AM
Subject: Re: [PEDA] Assembly drawing reference designators
> In a message dated 5/30/2002 8:16:26 AM Easte
can anyone advise me on the following please?
i am about to do a design for a 150,000 pc run
for cost reasons (low end commercial product) the bd material must be
made out of night soil (actually phenolic)
the design is SMD and to be a single sided bd (one etch layer)!
the lead pitch is 0.5mm o
At 02:25 PM 5/24/2002 -0700, Brad Velander wrote:
>Abd ul-Rahman,
> no you are not describing the process that I was trying to recall.
>Trust me, your description in no way resembles the process, nor is your
>process limited to Ver. 2.8 is it?
No, it is not so limited. "The process," as M
Hi Everyone!
Our Financial Director finally sent off our order for Protel today and I can't wait to
get into it. I know most of you guys have been using it for years but think back to
when you first started using it...
As with all software, I might expect some of the default settings for Prote
John
In the current version there is no way of finding stubs. Perhaps this
feature is avail in the DXP version
Mike Reagan
EDSI
Frederick MD
- Original Message -
From: "John W. Childers" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, May 29, 2002 1:07
I have several questions connected with 2 issues of pointing to a document
which is within Protel's database. (Protel99SE + SP6, WinNT4)
Issue 1: Adding (to a list of current libraries) specific library
file which is within library database containing several
libraries.
Whe
I use the ".Designator" string on all PCB library parts. I draw a part
outline on mechanical layer1 and the designator string. For bottom side
components I change these to mechanical layer3 by unlocking primitives and
doing a global change layer and mirror string on the ".designator" string.
I fin
At 01:14 PM 5/29/2002 +1000, [EMAIL PROTECTED] wrote:
>I just discovered another 'bug' fix for the spreadsheet editor. It always
>seems
>to default to locked and therefore any update you try to paste back from Excel
>(a usable spreadsheet package) causes a crash and suggests a reboot.
That the
I just discovered another 'bug' fix for the spreadsheet editor. It always seems
to default to locked and therefore any update you try to paste back from Excel
(a usable spreadsheet package) causes a crash and suggests a reboot.
The problem can be overcome by going to : Options ->Preferences and
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