Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Bob Roan" <bob@t...> wrote:
> I am trying to make my own PCB boards and have identified at least 
(!)
> two areas where I need help.
>  
> #1 - When I held the drill in my hand to drill the holes, they 
weren't
> in very good alignment (probably an understatement.)


On my first sttemps, my chip holes were all over the map.  this is 
not typical of non-cnc stuff.

One solution is to make a drill guide.  for this, you can buy a chip 
carier with machined pins.

drill out the holes with a proper size drill bit.  then drill one 
hole at one corner of your chip and take a drill and put it thru the 
chip carrier and board.  drill the opposite corner and put another 
drill in that hole.

now when you drill the rest of the holes, they will all line up.

as for thru holes, make big pads so your drill will deffinatly 
penetrate both.


I think the via's probem was answered by other.

Dave