Via Laughingsquid.com:

Norman Chan of Tested recently attended the 2015 Maker Faire in San Mateo, California and chatted with Chris James of the R2-D2 Builders Club to learn more about the process behind how he built his custom R2-D2 astromech droid from Star Wars.

What makes up an R2-D2 Astromech? We chat with members of the R2 Builders club to learn about the process of building your own droid–the materials, power systems, and electronics needed to get started. Chris James of the Bay Area club chapter opens up his own R2 and shares the custom controls and components he’s designed to make his droid come alive!