November 2007
Beginner
320 pages
11h
English
Content preview from The Unofficial LEGO MINDSTORMS NXT Inventor's Guide
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220 CHAPTER 15
Start the robot, step back, and watch for a moment.
Two legs on each side should be synchronized with a third
leg on the other side, so that Guard-Bot always has three
legs on the ground. Move toward the front of Guard-Bot
until the robot detects you (it should say, “Aha!”) and throws
its ball at you. After that, Guard-Bot should stop and wait
until you bump its touch sensor, letting it know that you’ve
reloaded its ball.
Next, let Guard-Bot walk to the black line on the test
pad, and watch what happens. Guard-Bot should promptly
take three steps backward and then change direction by
running its legs in opposite directions. No
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