There are several approaches to building your biped platform. Perhaps the most simple is to purchase a set of basic parts; this is the example you'll see in this chapter. There are several kit possibilities out there, including one at http://www.robotshop.com/en/lynxmotion-biped-robot-scout-bps-ns-servos.html, a kit like the one offered at http://www.ebay.com/itm/10-DOF-Biped-Robot-Mechanical-Leg-Robot-Servo-Motor-Bracket-NO-Servo-Motor-good-/131162548695?pt=LH_DefaultDomain_0&hash=item1e89e5a9d7, or the one at http://www.amazon.com/gp/product/B00DR7GA4I/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1. This is the specific kit we'll use in this chapter.

In the end, your biped will work more like the legs of a Tyrannosaurus Rex of a human, but this will make it easier to program, and it will power down more gracefully. It will also be a bit more stable.

You'll also need 10 standard size servos. There are several possible choices, but Hitec servos are relatively...