7 Replies Latest reply on Jun 23, 2017 9:20 PM by dougw

    PCB Layout without Schematic?

    mathewjenkinson

      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

        • Re: PCB Layout without Schematic?
          CadSoft Guest

          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?
              CadSoft Guest

              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?
              artemen

              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.