Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
>
> On 05/03/2012 20:24, John wrote:
>   Project under planning... The chip fit fine but I
> > wonder about the drill size. It may be too big to leave enough copper
> > for pads. IS 1 mm THE RIGHT SIZE FOR PC BOARDS GENERAL USE?
> 
> I use 0.7 mm or 0.8 mm for most parts, including ICs. I often use 0.6 mm 
> for vias.
> 
> > Comments, criticism and laughter invited...
> 
> Try photo-etch, it's much easier.
> 
> Leon
> -- 
> Leon Heller
> G1HSM
>

I also use 0.8mm for most things like capacitors, resistors etc. You need 1.0mm for some diodes, TO-220 regulators and such. Some even more.

If you're ever unsure - check before you design! Measure the lead with  callipers if necessary. Quite annoying having a pad too small for a hole on an otherwise perfect board.