Issue 8 of the RS Components magazine, eTech, features an article I wrote on open source hardware projects concerned with energy-efficient and renewable technologies. The abstract is as follows:

Open source techniques are being employed in the development and provision of access to an increasingly diverse range of technologies. In this article we'll take a look at two comprehensive open source projects that incorporate elements of mechanical, electrical and software engineering. One that is concerned with building a hydrogen fuel cell electric car, and another with making wind turbine designs freely available to all.