Re: gEDA-user: PCB & Gschem

[Peter Brett <peter@xxxxxxxxxxxxx>]

On Friday 24 February 2006 21:41, Dave McGuire wrote:

> On Feb 24, 2006, at 4:37 PM, Marc Price wrote:

>    Schematics are a logical representation of a circuit's ELECTRICAL
> topology...not its implementation in the physical world.  There's a big
> abstraction layer there.

Although the schematics can incorporate considerable constraints on the 
physical implementation: for instance requiring impedance-matched traces on 
the PCB... ;)

I definitely like light symbols.  The big board I made last year had only 
values, precisions and quality factors on the resistors/capacitors/inductors, 
and then I used a custom script to fill in the part numbers, footprints and 
availability data from a database into the BOM/netlist directly; they were 
never in the schematics, and all I needed to do to move from 0805 to 1206 
resistors for a particular value/precision (approx. 40 of) was to change one 
entry in my database and regenerate the netlist. Plain text formats 4tw.

Peter

-- 
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