Actions
Forum Thread Details
  • Replies 2 replies
  • Subscribers 177 subscribers
  • Views 313 views
  • Users 0 members are here
Related

Single Sided Board with Jumpers

autodeskguest

How can I AutoRoute a single sided board with jumpers. It has been suggested

to do a double sided board and then only etch one side and use wires on the

top for jumpers, but how do you use wires for between IC legs ? Possibly do

an single sided board, find problems in the layout and add 0ohm resistors in

the schematic to be the equivalent of jumpers ?

 

Thanks Wallace

 

 

 

  • On Sun, 18 May 2008 Wallace wrote saying :

    How can I AutoRoute a single sided board with jumpers. It has been suggested

    to do a double sided board and then only etch one side and use wires on the

    top for jumpers, but how do you use wires for between IC legs ? Possibly do

    an single sided board, find problems in the layout and add 0ohm resistors in

    the schematic to be the equivalent of jumpers ?

     

    If you're doing autoroute for a single-sided board you need to make the

    "cost" of the top layer very high. This will minimize the number of wire

    links you need. There's an example project for how to do this.

     

    If you have particular areas you can't put wire links into, you can mark

    them in the tRestrict layer and the autorouter should avoid putting

    top-side tracks there.

    --

    Rob Pearce                       http://www.bdt-home.demon.co.uk

     

    The contents of this | Windows NT crashed.

    message are purely   | I am the Blue Screen of Death.

    my opinion. Don't    | No one hears your screams.

    believe a word.      |

     

  • Wallace wrote:

    How can I AutoRoute a single sided board with jumpers. It has been suggested

    to do a double sided board and then only etch one side and use wires on the

    top for jumpers, but how do you use wires for between IC legs ? Possibly do

    an single sided board, find problems in the layout and add 0ohm resistors in

    the schematic to be the equivalent of jumpers ?

     

    Thanks Wallace

     

     

     

    I always find it slightly disturbing that people want to autoroute single

    sided boards (or even double sided).  Far better results are obtained by

    taking time to understand and appreciate the current flow, and routing by

    hand. Good routing of these boards is more important than for >4 layer

    boards , where there is probably a decent ground plane.

     

    Having said that if insist on using the autorouter then -yes simply do a

    double sided board with a high cost factor for the top layer. When routing

    by hand you also approach it as a two layer board-using the top for your

    jumper wires.

     

    How do you wire between IC legs?- well if they are through hole you simply

    put a wire between them- similar to wire wrap style.

     

    If it is SMT then perhaps re-route slightly and add in an appropriate couple

    of vias. You still need to clean up and put in some effort for an autorouted

    layout.

     

    cheers

     

    David