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Subject:	Re: [geda-help] adding missing footprints
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Date:	Fri, 15 Jan 2016 19:45:09 -0500
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On 01/15/2016 07:06 PM, Gene Heskett (gheskett AT shentel DOT net) [via 
geda-help AT delorie DOT com] wrote:

>
> As a for instance the transistor is a 2SK3264 mosfet.

According to this data sheet the footprint is T0220F-15.


http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwie6KLth63KAhWFgj4KHf8sAvwQFggjMAE&url=http%3A%2F%2Fwww.ges.cz%2Fsheets%2F2%2F2sk3264.pdf&usg=AFQjCNEaTIy64sPOCrk4f9o4J5UXB1vUcA&sig2=ZiIIqXkqVjKe3QvR5OwPaA&cad=rja

I don't know what the F-15 stands for but is probably some modification 
of the standard T0220 package.  From the sounds of it you want to mount 
it vertically.

In gschem, select the part so it is highlighted.
Right click and choose EDIT.
Go down to 'add attribute' and click on the drop down menu and choose 
"footprint".
For the value put TO220W  .



>
> The diodes are 1N5822's, and because they are bulky bodied, will likely
> be mounted standing up, and that may still require pads on >100 mill
> centers.


This shows the package of the diode, DO-201AD:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjG9qupiq3KAhWCej4KHcDKDYgQFggjMAA&url=http%3A%2F%2Fwww.farnell.com%2Fdatasheets%2F107972.pdf&usg=AFQjCNENpv4POiMcGVCX3FioAf33qKSumQ&sig2=x17-fImPGrBZyY6bourkBg&cad=rja

This is a little trickier because some diodes have larger leads than 
things like resistors and capacitors.  ACY100P will give you the spacing 
you are looking for but you may have to do something about the lead 
size.  It may be too small.

The problem we have is you don't seem to understand the concept of foot 
print.  It is how much space the part takes up on the board.  The same 
part comes in different packages so the program doesn't know which until 
you tell it.  Think of it this way.  1K ohm resistor?  Through hole or 
surface mount?  1/8W or 10W.  A 1K ohm resistor can have dozens of foot 
prints.

Adding a few should help you start to understand that so try it and it 
might make more sense.  Then we can help you refine what you want to do. 
  At some point you will simply want to print the board out actual size 
and see if it makes sense.

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