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Date: Wed, 18 Mar 2015 13:31:42 +0100 (CET)
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Subject: Re: [geda-user] pcb alternatives
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On Wed, 18 Mar 2015, Bernd Walter wrote:

> On Wed, Mar 18, 2015 at 07:50:36AM +0100, Bernhard Kraft wrote:
>> Hi,
>>
>> On Tue, Mar 17, 2015 at 8:17 PM, ?????????????????? ???????????? <alushanov92 AT gmail DOT com> wrote:
>>> Bernhard Kraft, can I see your make scripts?
>>
>> Here it is:
>> https://gist.github.com/kraftb/9765e93862562c2d6c4a
>>
>> I use the prefix "tom-" for all my designs (means "think-open module")
>> and then an appropriate city name. "tom-alexandria" is a project for
>> having a SD-card ext2 filesystem module with I2C/SPI interface doing
>> all the low level SD and ext2 stuff. A microcontroller could then do
>> fopen/read/write/seek stuff on filehandles.
>
> I also use my own set of footprints.
> The reason is that footprints need to be compatible with the production
> technology.
> When you run with solder paste, stencil, oven, be capable to position
> precisely enough, then you can go with short pads.
> For soldering with iron, or if you are not very expirienced with hot air
> repair you better go with long pads.
> The structure is still a mess and very often I just run an editor to
> extract footprints from known good older designs.

This could be done by having multiple libs. This makes it easy for the 
user if there is a single process: just install the lib you are going to 
use. Of course if you need multiple processes you'll need to do some more, 
which is extra cost on advanced users. However, "easy for the simple cases 
and more work required for advanced cases" is a good balance imo.

An alternativ is what some parts of the pcb default lib does (or did?): 
prefix/suffix in the name of the footprint. I don't have PCB on this 
amchine at the moment but I have some faint memory of 1206-like smd 
footprints with the "N" suffix for normal, and two other suffices for thin 
and thick pad.

Regards,

Igor2