Homebrew PCBs

I am wondering if there may be some way to use mirrors to view both
sides of a circuit board at the same time as an aid to aligning
circuit traces. I am thinking something like an old stereo photo
viewer. Basically each side of the board shows in each eye and the
second side adjusted until the holes line up.

Alternatively maybe two digital cameras could be used and the images
superimposed on a monitor.

There may be a tool that does something like this, but I could find
nothing on google. I probably was not using the correct terminology.

--- In Homebrew_PCBs@yahoogroups.com, "javaguy11111" 
<javaguy11111@y...> wrote:
> I am wondering if there may be some way to use mirrors to view both
> sides of a circuit board at the same time as an aid to aligning
> circuit traces. 


The best way I know of is to do alignment holes in your patterns 
that match on both top and bottom then match these holes in the 
board then pin thru both pattern and the board to hold them 
together.  

Now if you are doing Toner Transfer not sure how that will work with 
it pined together with whatever heating method you use, as I do 
postive exposure with Transparencies. 


Ben

I am trying to line up press and peel. I have done one two sided board
just lining up and taping. That worked, but I am going to be doing
much smaller holes and I think I am going to have problems maintaining
alignment so I was trying to think of other ways to make sure things
line up.



--- In Homebrew_PCBs@yahoogroups.com, "Ben H. Lanmon" <bhleavi@y...>
wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "javaguy11111" 
> <javaguy11111@y...> wrote:
> > I am wondering if there may be some way to use mirrors to view
both
> > sides of a circuit board at the same time as an aid to aligning
> > circuit traces. 
> 
> 
> The best way I know of is to do alignment holes in your patterns 
> that match on both top and bottom then match these holes in the 
> board then pin thru both pattern and the board to hold them 
> together.  
> 
> Now if you are doing Toner Transfer not sure how that will work
with 

> it pined together with whatever heating method you use, as I do 
> postive exposure with Transparencies. 
> 
> 
> Ben

<javaguy11111@y...> wrote:
> I am trying to line up press and peel. I have done one two sided 
board
> just lining up and taping. That worked, but I am going to be doing
> much smaller holes and I think I am going to have problems 
maintaining
> alignment so I was trying to think of other ways to make sure 
things
> line up.


Well I would guess that you could do the press and peel for one side 
drill two or three of the thru holes for alignment, turn it over and 
align your second side to the holes. 

I could be wrong as I have never used press and peel before.

Ben