Homebrew PCBs

matt clement wrote:

>What is the best way to align side two before etching both sides?  I 
>cant seem to get them to light up no matter what i do.
>
>My only thought was to etch one side while coating the second side in 
>resist.  Once the first side is etched drill a few holes and then use 
>them to align the second side?
>
>  
>

  Similar idea, but drill holes for side one then iron the second side 
aligned before you etch.  Iron/laminate one side.  Drill two of your 
holes near opposite corners, get it as accurately in center as 
possible.  Flip board, push 2 drills through same holes in sheet for 
other side, and stick into holes.  Tape edges and laminate, or iron the 
2 corners without drills until sticking, then take out drills and iron 
the whole thing.

  If your holes go off a bit, push through the second side paper off a 
bit to correct, etc.  A bit more work than just aligning both sheets and 
putting the board between, but since you can make small corrections for 
the second side you usually end up with pretty good alignment.  May take 
a board or two to get the hang of it, but reasonable enough after that.

Alan