The four component parts that are used to construct the Blue-Dot iButton reader found in the DS1402D-DR8 and DS1402D-DB8 are described here. Diagrams 1 through 4 show the individual part dimensions. This document also describes how to assemble the Blue-Dot given the sub-parts listed in Table 1. The Blue-Dot can be assembled in the three easy steps described in the Assembly Instructions section.