A Gerber file for each section of your electronic circuit design is what you need if you want to create a PCB. In this Gerber tutorial, I will teach you how to create the files you need for a 2-layer board using Cadsoft Eagle. After you have completed this tutorial you will have all the necessary files needed to send to most PCB manufacturers.
Build Electronic Circuits Blog
A short guide on reading schematics for beginners.
How to create circuit schematic diagrams.
A simple explanation about the Gerber format. What is it? what does it do? What is the standard?
Some really cool circuit ideas for your next electronic project
This article explains how you can create a cheap PCB for your electronic circuit and lists some PCB manufacturers.