Below is a list of code of ethics for major professional societies in Engineering and affiliated professions. If you're looking for a code of ethics, try searching your favorite professional association's website.
In this library session your librarian will demonstrate how to search individual journals and browse table of contents for inspritation.. Table of contents and browsing articles can help inspire you in and help you understand the narrow scope of an ethical analysis.
Stuck thinking about a topic? Try searching one of these engineering databases for a topic that interests you. These are technical engineering databases so they are best for topic exploration not related to ethics.