December 2001
Intermediate to advanced
448 pages
18h 49m
English
Content preview from Building Robots With Lego Mindstorms
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354 Chapter 18 • Replicating Renowned Droids
Looking at the bottom of the robot, you can see the beam that supports the
pivoting wheel (Figure 18.6).
The head mounts a light sensor (Figure 18.7) that you’ll use to locate the
light source, and gets rotated through a pulley-belt worm-24t gearing system
(Figure 18.8).This is one of those cases where pulleys and belts help in transmit-
ting motion to a distant subsystem.A touch sensor detects the central position of
the head through the tip of a cam, with a system similar to the one described in
Chapter 14 about the steering assembly of a car.
www.syngress.com
Figure 18.5 Side View
174_LEGO_18 10/29/01 4:28 ...
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