I'm working on a simple lighting display for a friend's night club event. It's based on 9 Aerpro 'neon' under car lights and will be sequenced by an Arduino.

I've decided that this would be a good a time as any to design my own Arduino shield and to start having a serious attempt at using gEDA.

In the process of developing PCBs it is quite normal for the first revision of a design to require modification - either due to error or a design afterthought/improvement. Here are some examples and thoughts on how to successfully modify a PCB. This is not a specific project as such, rather an attempt to start collecting ideas and processes that I have come across or developed over the years. This is work in progress, please comment.

Cutting tracks: