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206 Bu il d Y o ur O w n Q u a d c o p t e r

Figure 8.15 Parallax XBee SIP Adapter.

I used two different approaches to mounting the XBee modules. The first was to use
Parallax’s XBee SIP Adapter, which is shown in Figure 8.15 with an XBee mounted on it. SIP
is an abbreviation for single inline package, which is a strange description if you look at the
adapter’s bottom edge where two rows of pins are attached. The two-pin rows are just to
provide mechanical stability, since the two pins in each row are electrically connected to
one another.
The other mounting approach is actually part of the Parallax’s Propeller Board of
Education (BOE) development board. The Parallax BOE designers thought that the XBee
would be a very popular peripheral for this board, so they incorporated two 10-pin-row
mounting sockets. The BOE is shown in Figure 8.16 with the XBee socket visible at the bottom

Figure 8.16 The BOE.