Noise Measurement - To accurately measure noise (or high frequency signals) with your oscilloscope it is necessary to reduce the radiated noise that is coupled to your probe.

The gEDA project is a set of tools for electrical circuit design, schematic capture, simulation, prototyping, and production. The PCB project contains a tool for printed circuit board layout.
Luciani.org - EDA and Design Notes
Twitter Interface - jluciani
Breadboard Basics from Luciani
This is a nice "Page with Pictures" that we all like. John Luciani explains how to prototype a circuit to try out a concept.
Soldering and Shiny joints are everything in electronics. One dry solder, a cut track, a solder bridge or splatter near the IC can make a card malfunction.
Thin copper tracks taking high currents, HV and LV circuit isolation, Ground loops, RF Antenna Effect, Ground Plane and Guard rings are just some things to know on Component to Component Connections, that make a huge difference.
in reference to: Luciani.org ..... Home Page (view on Google Sidewiki)