Homebrew PCBs

> 
> > Hi friends ,
> > I am looking for some very basic information about pcb 
> > designing...
> >   sunny
> >
> 
> ALWAYS CHANGE THE SUBJECT LINE OR NOBODY WILL ANSWER!


I agree, changing the subject line makes understanding the post much 
easier and if there has been a thread of some duration, many people 
do not read all the responses is they have no interest in the topic.  
That loses 3/4 of the readers.  Second, it can rarely be found in a 
search.  Again, not good.

So, 

always change the subject line.


As for corners, for home brew espically, the time in the etching 
solution will undercut the resist and 90 degree corners are the most 
suseptable to being reduced in size to the point of being too small 
to carry the load.

In CAD programs, one can often have a auto-champher that will take 
those 90 degree and make them 45 deg.  If you are concerned, create a 
triangle and just paste it into each corner.


My other rules of making traces is that they can never be too big, 
but can be too small !

Start larger than you need and only reduce when you need to.  


Avoid running between pads if the routing is not too much trouble.  

If you have room, put elongated pads by your chips.  It is often 
possible to come back and drill a tiny hole for a resistor or cap 
to 'fix' an oversite.

Dave

ps: the following is good advise, just in case no one else mentioned 
it.....

> ALWAYS CHANGE THE SUBJECT LINE TO SOMETHING MAKING SENSE!