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Old 3rd October 2012, 04:17 PM   #1491
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Originally Posted by EUVL View Post
> I wanna see pcb's when i get back...
Will take quite a few days, since I do not use PCB layout software.
They cannot do what I want to do; to many restrictions.

It depends on what's on your mind. Many tricks can be done with modern PCB software, it just takes some learning time.
Here's one 10 years old example from my past. All lines drawn by hand within that particular software enviroment
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Old 3rd October 2012, 04:23 PM   #1492
EUVL is offline EUVL  Europe
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If I want to draw every line manually I have better software to use than PCB software.
I am not restricted to any grid or standard device pin layouts.

Of course you are welcome to take over. I am sure Scott will welcomne that.
And I certainly have more than enough on my to-do list waiting to get done.

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Old 3rd October 2012, 04:46 PM   #1493
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I'm sorry Patrick, you've probably misunderstood me. It was just a remark that it could be done, including "by hand". I have no intention to take over, I've plenty to do myself
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Old 3rd October 2012, 05:24 PM   #1494
EUVL is offline EUVL  Europe
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For the F5X project, fitzfish tried over a period of months (< 100hrs.) to duplicate a PCB layout that I did with a mechanical CAD software.
The only reason then was that I had no means to convert a dwg file to Gerber.
Even with his huge effort, which I found out only afterwards, he still could not replicate all the features that I had in the original.
This is especially so with the shaping freedom that I had with dwg files.

So while at one stage I was motivated to learn PCB software, in the end I decided not to. For exactly those reasons.
And of course in the meantime, the conversion problem from dwg to Gerber is solved.

Of course there are applications, like complicated circuits, where PCB layout software will be useful to avoid mistakes.
But for simple analogue layouts I am sticking to dwg.

Anyone who is skilled in Eagle or whatever else who wants to take on the challenge can contact me.
But you might want to check with fitzfish first to verify what I just said.
And he is, as I know, very experienced with PCB work.
So you can figure out why he needed 100hrs.+ for the simple F5X PCB.

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Old 3rd October 2012, 05:37 PM   #1495
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Eagle allows you to create any arbitrary copper polygon shape and name its net, so it maintains connectivity, etc., while allowing the flexibility of hand-drawn arbitrary shapes. However, it takes a bit of effort to use it effectively for anything other than ground and power planes.
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Old 3rd October 2012, 05:38 PM   #1496
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Im a mechanical engineer in the ground and have worked alot with Autocad and inventor, I have also worked a bit with orcad capture and orcad Layout. But I can not see any direct advantages to do the cad part in Autocad instead of Orcad layout?
And misunderstand me correct, I mostly hate orcad Layout but I think it is very beneficial to have the schema in capture and select a component there and the same component light up in the layout program and vice versa.
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Old 3rd October 2012, 05:48 PM   #1497
bcarso is offline bcarso  United States
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I'm keen to know what people have found effective, as I may soon break down and start doing layouts. Much as I appreciate the efforts of those I've done business with over the years, the only person so far I've worked with who has good instincts about routing is way too busy in a company of his own. With others they either know too much and second-guess, or always make at least one error, or make a plurality of errors, or have depressing attitudes.
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Old 3rd October 2012, 06:15 PM   #1498
EUVL is offline EUVL  Europe
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So anyone wants to take on the challenge to redo the layout in post #1379 using a PCB layout software ?

Schematics is here :

Discrete Opamp Open Design

Footprint is 10x10mm, DIP8 single opamp pin out for Pins 2,3,4,6,7.
Components all on the top side for heat sinking.
Bottom side space reserved for DC trim resistors and frequency compensation network.

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Old 3rd October 2012, 07:03 PM   #1499
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For my personal use, I would like to see a layout to is pin compatible with a JE990 opamp. I don't use any 8 pin DIP opamps except to drive meters and in power supplies. But my recording console is full of JE990s. Just my 5 cents. I may have to lay one out for myself. Ray
" Polarities are seldom aware of their polarness." Prospero
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Old 3rd October 2012, 07:14 PM   #1500
RNMarsh is offline RNMarsh  United States
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I found ExpressPCB to be easy and fast for small size, two layer projects. Put the results up in a cloud. Then all have access to make pcb themselves from the drawings (or modify it). Cloud I use is DropBox. [cloud space and pcb software are free]
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