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Does anyone know how to replace vias in auto routing with 0% SMD resistors?

mikeguidry

I'm a recent purchaser of Eagle since I'm getting a bit serious about designing hardware.  I'm doing isolation milling, and also going to start testing Voltera's V-One for some portions.

 

Vias (thus far, but I haven't tried the conductive ink solution from Voltera) isn't as easy at home.  I have ordered solutions to do 2-3 different ways which I'll test, although I had bought a reel of 1000 0% SMD resistors.  I think this is a great option for doing single side boards without requiring vias if all components are SMD.

 

I was wondering if anyone knows, or has experience with the best way of using these to route?

 

Is it possible to 'configure' the auto router for doing other tactics?  I have also considered a script to attempt to find, or generate these 0% resistors.

 

Has anyone else used this, and what are your best methods?

 

Thanks.

mike

  • I don't like the auto router and route manually.

     

    I design single sided boards as double sided and use the lower layer to show me where my link wires should go. You could do something similar, and use very small vias to create the 'pads' for the resistors - I've done that once or twice before now.

  • michael guidry wrote:

    had bought a reel of 1000 0% SMD resistors.  I think this is a great

    option for doing single side boards without requiring vias if all

    components are SMD.

     

    I was wondering if anyone knows, or has experience with the best way

    of using these to route?

     

    Is it possible to 'configure' the auto router for doing other

    tactics?  I have also considered a script to attempt to find, or

    generate these 0% resistors.

     

    No, the autorouter can not use 0R resistors for track crossings.

     

    Inserting 0R restiors would mean breaking up the net and would require

    inserting the resistor in the schematic.

     

    But you can perhaps getthe autorouter to use the second layer only for

    short 'bridges' across other track by tweaking the cost factor for the

    second layer, but I don't use the autorouter so I can't help you

    there.

     

    If you then have the short second layer hops (either by routing by

    hand of by choosing the autorouter settings accordingly) you then can

    set the via shape, drill and outer diameter in a way, that you can use

    them as pads for your 0R resistors (for a 0805 resistor I would try

    ocagonal or rectangual shape, an outer diameter of 60mil (1.5mm) and a

    very small drill (so you don't get a perceptible hole in you 'pad')).

     

    You will need to adjust the spacing of your 'pad', especially when

    using the autorouter.

    --

     

    Lorenz