Comments on: Circuit Drawer

Question: Circuit Drawer

iconjack — Tue, 14 Apr 2009 22:37:04 -0800

Anybody know of any free software that will take my logic equations and make a circuit diagram?

As an example, the following describes a circuit with three inputs and three outputs. I'd like to have this automatically drawn up with the usual symbols for and-gates, or-gates, and inverters. Of course the syntax can be anything similar to this.

Inputs X0, X1, X2; outputs Y0, Y1, Y2.

W = ! ( X0∙X1 + X1∙X2 + X2∙X0 )
Z = ! ( X0∙X1∙X2 + (X0 + X1 + X2)∙W )

Y0 = W∙(Z + X1 + X2) + Z∙X1∙X2
Y1 = W∙(Z + X0 + X2) + Z∙X0∙X2
Y2 = W∙(Z + X0 + X1) + Z∙X0∙X1

By: teraflop

teraflop — Tue, 14 Apr 2009 23:05:20 -0800

Maybe Logic Friday will do the trick?

By: hattifattener

hattifattener — Tue, 14 Apr 2009 23:29:10 -0800

Do you want it to do optimization / synthesis kinds of things? Or just directly translate the algebraic notation into an equivalent set of gates?

By: iconjack

iconjack — Tue, 14 Apr 2009 23:47:06 -0800

I would like a gate diagram that matches the structure of my equations, without an optimization. Logic Friday looks very promising!

By: zachlipton

zachlipton — Tue, 14 Apr 2009 23:49:50 -0800

Logisim is fairly limited (intended for student projects) but is free and should do what you're looking for. It's cross-platform (Java).

By: iconjack

iconjack — Wed, 15 Apr 2009 00:02:23 -0800

Logic Friday is pretty nice, but I can't seem to prevent it from "minimizing" my equations, thereby changing the structure of the circuit.

By: a womble is an active kind of sloth

a womble is an active kind of sloth — Wed, 15 Apr 2009 06:13:04 -0800

I've never done what you described above, but you can construct models of circuits using this software Modelica or OpenModelica (so perhaps it is useful?)