Given the schematic for a simple circuit, make it a real circuit with the base components, some conductive thread, and a 3D printer. No solder, no etching chemicals, no sending away for anything. 3D-Printed Circuit Boards, for solder-free printable electronics Instructable is to serve as the how-to guide for a 3D-printed electronic circuit library implemented in OpenSCAD, 3D-PCB. The article shows the full replication process of a simple analog circuit of a blinking LED made from a few transistors, capacitors, and resistors, a single LED, and a AAA battery. The article also includes a more useful example of an LED flashlight. Here is a nice picture from 3D-Printed Circuit Boards, for solder-free printable electronics article that illustrates how this kind of 3D printed circuit looks like.
3D-Printed Circuit Boards, For Solder-Free Printable Electronics article points out that you just need OpenSCAD 3d-printed electronics library, a 3D printer and some conductive thread. OpenSCAD generates a component holder, and conductive thread wraps it all together — no solder, no etching chemicals, no sending out for anything. OpenSCAD 3d-printed electronics library
OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and Mac OS X. 3D-Printed Circuit Boards, for solder-free printable electronics article also points out that if you prefer Blender or SketchUp, you can them to help your design process.