EAGLE Central Forums
Where the EAGLE community meets. Sponsored by Stratford Digital.

Home » CadSoft Support Forums » eagle.userchat.eng » PCB Layout without Schematic?
PCB Layout without Schematic? [message #152421] Fri, 20 September 2013 12:42 Go to next message
Mathew Jenkinson
Messages: 1
Registered: September 2013
Junior Member
Hi all,

In the past, I've drawn all my PBC's on Adobe photoshop or illustrator
however I would like to start the transition over to Eagle as the
designs are getting more complex.

Having downloaded, installed the free copy and followed the tutorials
about making up an electronic schmatic and then moving it to the
designer part to design the PCB.
Am I able to skip the electronic schmatic?

The next few sets of boards I need to produce are 5V powerboards (One 5V
input and 4 * 5V outputs) all nice and simple with screw terminals for
both the inputs and the outputs.
Using illustrator I can mock the board up within 10 mins but that
defects the point of learning eagle :) .

Is it a case of all boards start with a schmatic? or is there a way to
skip the schmatic and draw the pins stright to a pcb board?

Many thanks for your answers,
Mathew

--
To view any images and attachments in this post, visit:
http://www.element14.com/community/message/89543#89543
Re: PCB Layout without Schematic? [message #152425 is a reply to message #152421] Fri, 20 September 2013 15:12 Go to previous messageGo to next message
Andreas Weidner
Messages: 564
Registered: November 2008
Senior Member
Am 20.09.2013 14:58, schrieb Mathew Jenkinson:
> Is it a case of all boards start with a schmatic? or is there a way to
> skip the schmatic and draw the pins stright to a pcb board?

IN PRINCIPLE, you can just create a board WITHOUT schematic (menu File -
New - Board) and add your elements there, no problem.

BUT if your designs get more complex, and debugging a board without a
schematic is REALLY awful, you should consider creating a decent
schematic for ALL your projects. Plus nobody will understand your
circuit without schematics documentation, anyway, and documentation is
more or less an absolute MUST everywhere. Even for very small circuits
with only ten components or so, we create a schematic: It makes the
function clear for everybody, and finding problems is SO much easier...

Andreas Weidner
Re: PCB Layout without Schematic? [message #152430 is a reply to message #152425] Fri, 20 September 2013 21:02 Go to previous messageGo to next message
Rob Pearce
Messages: 475
Registered: September 2012
Senior Member
On 20/09/13 16:29, Andreas Weidner wrote:
> Even for very small circuits with only ten components or so, we create a
> schematic:

Ten? TEN? I create a schematic if I have THREE components!

Yes you can just draw what you think, off the top of your head at
random, the board ought to look like. But if you do then you are doing
art, not PCB design.

The PCB is an implementation of a circuit, not the essence of the
circuit. If you don't have a schematic you don't know what the essence
of the circuit is. Besides, the extra time needed to draw a schematic of
five screw terminal blocks connected together, compared to placing the
same blocks on a PCB unaided, is less than a minute.
Re: PCB Layout without Schematic? [message #169073 is a reply to message #152421] Sat, 28 January 2017 18:35 Go to previous messageGo to next message
artemen n
Messages: 1
Registered: January 2017
Junior Member
Its very usefull, when you have a bunch of portel, orcad and altium files. for some reason, .PCB files are imported perfectly, while schematics are messed up.  it would be nice if we could be able to recreate those schematics.

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/214603
Re: PCB Layout without Schematic? [message #170773 is a reply to message #169073] Sat, 17 June 2017 08:32 Go to previous messageGo to next message
Sarah H
Messages: 4
Registered: June 2017
Junior Member
Second this!

Is there any way to generate a schematic from a board in Eagle?

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/224214
Re: PCB Layout without Schematic? [message #170778 is a reply to message #170773] Sat, 17 June 2017 19:06 Go to previous messageGo to next message
Douglas Wong
Messages: 59
Registered: October 2013
Member
It is a pretty manual process - the tool tells you what is different between schematic and PCB and you have to make appropriate changes to the schematic to make them match up. It sort of tells you what to do, but you have to manually do it....Once the tool is happy that the schematic matches the PCB, forward and backward annotation start to work seamlessly.

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/224236
Re: PCB Layout without Schematic? [message #170835 is a reply to message #170778] Sat, 24 June 2017 01:52 Go to previous messageGo to next message
Sarah H
Messages: 4
Registered: June 2017
Junior Member
Thanks!

Went through that manual process... +All the ERC checks+ O_O but now it works.

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/224730
Re: PCB Layout without Schematic? [message #170836 is a reply to message #170835] Sat, 24 June 2017 02:20 Go to previous message
Douglas Wong
Messages: 59
Registered: October 2013
Member
Well done

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/224643
Previous Topic: Eagle 6.6 pro licensing
Goto Forum:
  


Current Time: Thu Jun 29 08:56:42 GMT 2017