Homebrew PCBs

On Sat, 18 Mar 2006 22:12:56 +0100, kilocycles <kilocycles@...>  
wrote:

> Stefan,
>
> I'm not sure how to do that in Eagle  Once I get the supply pins to
>
> show up, using the "invoke" command, I don't think the pins are
>
> repositionable.  One thing I noticed when I first started playing
>
> around with DipTrace is that it worked somewhat differently.  For
>
> example, the first op amp I added, when I went to add the second
>
> section, the symbol with the same pin numbers showed up, instead of
>
> the higher pin numbers, as U1b. I think I remember being able to put
>
> the supply pins on either section, once I got the sections
>
> straightened out.
>
>
> I'll have to do some more investigating; maybe now is a good time to
>
> read the "Schematic Creating" tutorial by the guy from Japan.
>
>
> Ted


A quick look at the first result  
<http://www.testech-elect.com/cadsoft/tour13.htm> for "eagle creating  
library parts" on google shows it can do multiple symbols in one component  
and it even shows a power symbol beeing used. Now this page is crap, and  
it only shows this animated picture, but it _does_ show it is possible, so  
you should be able to find the details elsewhere. So if you want to use  
separate power symbols that should be fine, and it also shouldn't be a  
problem to put the power pins on one of the regular symbols.

Some programs have a separate function to insert the remaining symbols  
(with the higher pin numbers). For example in Target i have to use "insert  
rest of component" if i stop placing midway through it. If i don't  
terminate the place command they will be generated correctly with the next  
set of pin numbers.

It is also worthwile to read up properly on library part creation before  
you start, for example exchange gate commands can usually only be used if  
you prepared the component properly (this allows you to swap whole sets of  
pins with identical function to make routing easier).

ST