Advanced NXT: The Da Vinci Inventions Book (Technology in by Matthias Paul Scholz

By Matthias Paul Scholz

The images are terrible - despite a magnifying glass its very tricky to persist with. This turns what could be a useful studying adventure into expanding frustration for the younger engineer. Thumbs very down. the writer deserved greater schematic help!

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It lacks the retail version’s programming software, which is sold separately under different licenses for schools. 15 16 CHAPT ER 1 ■ INTRODUCTION Hardware Let’s take a look at the hardware components of the NXT. There are four main categories: • The central controlling unit: the NXT Brick • Output devices: motors • Input devices: sensors • Means of communication: Bluetooth The NXT Brick The central component of the NXT is the programmable controller, also known as The Intelligent Brick (Figure 1-10).

0 port next to the output ports or over the Brick’s Bluetooth connectivity, which is also a means for communication with other Bluetooth-enabled devices such as PDAs or mobile phones. On top of the Brick, there is a 100 × 64 pixel LCD display and four buttons that control the Brick’s operating system: orange for on/off; dark gray for clear/back; and two light-gray buttons for navigating the menus displayed on the LCD. A built-in speaker provides 8kHz sound quality over a sound channel with 8-bit resolution and a 2kHz–16kHz sample rate.

NXT-G driving straight Stopping How do you stop the robot using NXT-G programming? Simply enough: you use a move block configured to stop the two rear motors (Figure 2-17). 3. eu. CHAPTER 2 ■ A 3 ,000-FOOT LOOK AT NXT PROGRAMM ING ENVIRONMEN TS Figure 2-17. NXT-G stopping motors Rotating To rotate, you drag a move block onto the beam that drives the motors 45 degrees (Figure 2-18). Figure 2-18. NXT-G rotating Accessing and Handling Sensor Values Assume that you have an ultrasonic sensor attached to the Brick and you want to detect objects with it that are closer than 50 inches.

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