Homebrew PCBs

>
> On Jun 5, 2010, at 2:13 PM, Chris wrote:
>
> One of the things I don't like about making PCBs is soldering in a  
> bunch of wires to connect top traces to bottom traces. The more  
> surface mount stuff I use, the more often I need to add special vias  
> as I no longer have component legs to use for that purpose.
>
> I have used J-B Weld on a number of "emergency fixes" over the years  
> and have been impressed with its utility. I believe this is a  
> metalized epoxy which I assume should be conductive. I just mixed up  
> a smal batch and will have to wait till late tonight or tomorrow to  
> check it when it finally cures.
>
> If this does conduct, then I was thinking I could apply this way....
>
> 1) Etch board
> 2) Tin board
> 3) apply clear contact paper to both faces of PCB
> 4) Drill all via holes
> 5) Use a spatula to smear the epoxy into all of the holes
> 6) After curing, remove contact paper
>
> I suspect I might have small bumps of epoxy which if are a problem,  
> a light sanding would knock them down. If the sanding is required I  
> could put the board back in the liquid tin again.
>
> I probably won't be able to do a full test for a couple of weeks but  
> thought I would announce it to see if anyone else has tried this.
>
> Chris
>
>
>
> 
>

Intergoogle says that JB Weld is not conductive.
You may find this interesting....
http://www.circuitmart.com/mart/49690.shtml
Gus

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