Gerber Viewer (gerbv) is a viewer for Gerber files. Gerber files are
generated from PCB CAD system and sent to PCB manufacturers as basis for
the manufacturing process. The standard supported by gerbv is RS-274X.
The basic difference between RS-274D (the old standard) and RS-274X is
basically the addition of apertures in RS-274X. It might be possible to
make an RS-274X file out of an RS-274D file and an aperture list.
gerbv also supports drill files. The format supported are known under
names as NC-drill or Excellon. The format is a bit undefined and
different EDA-vendors implement it different. But basically you need to
have the tools definition in the file, then the parser is quite
tolerant. The different holes are shown as dots in the (scaled) correct
size.
from Andreas Bihlmaier <andreas.bihlmaier at gmx.de> (MAINTAINER), with some
tweaks by me
reminded by claudio@
Kicad is an open source software for the creation of electronic schematic
diagrams and printed circuit board artwork.
with some ideas from freebsd.
also tested by Antti Harri <iku at openbsd.fi>, thanks
PCB is an interactive printed circuit board editor. PCB includes a rats
nest feature, design rule checking, and can provide industry standard
RS-274-X (Gerber), NC drill, and centroid data (X-Y data) output for use
in the board fabrication and assembly process. PCB offers high end
features such as an autorouter and trace optimizer which can tremendously
reduce layout time.
based on a submission from andreas.bihlmaier at gmx.de
Gnu Circuit Analysis Package
The primary component is a general purpose circuit simulator. It
performs nonlinear dc and transient analyses, fourier analysis, and ac
analysis. It is fully interactive and command driven. It can also be run
in batch mode or as a server. Spice compatible models for the MOSFET
(level 1-7), BJT, and diode are included in this release.
submitted by andreas.bihlmaier at gmx.de
XCircuit is a program for drawing publishable-quality electrical circuit
schematic diagrams and related figures, and produce circuit netlists
through schematic capture. XCircuit regards circuits as inherently
hierarchical, and writes both hierarchical PostScript output and
hierarchical SPICE netlists. Circuit components are saved in and
retrieved from libraries which are fully editable.
from Zvezdan Petkovic <zpetkovic at acm.org>
