Fast Facts….. - Santiago Canyon College Computer Science

Fast Facts….. - Santiago Canyon College Computer Science
Fast Facts…..
Features | Specs | Sensors | Motors
Ron Kessler, Santiago Canyon College . © Copyright 2008
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The NXT is the brain of a MINDSTORMS® robot. It’s an
intelligent, computer-controlled LEGO® brick that lets a
MINDSTORMS robot come alive and perform different
operations.
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Motor ports
The NXT has three output ports for attaching motors - Ports
A, B and C
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Sensor ports
The NXT has four input ports for attaching sensors - Ports 1,
2, 3 and 4.
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USB port
Connect a USB cable to the USB port and download programs from your
computer to the NXT (or upload data from the robot to your computer). You can
also use the wireless Bluetooth connection for uploading and downloading.
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Loudspeaker
Make a program with real sounds and listen to them when you run the program
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NXT Buttons
Orange button : On/Enter /Run
Light grey arrows: Used for moving left and right in the NXT menu
Dark grey button: Clear/Go back
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NXT Display
Your NXT comes with many display features - see the MINDSTORMS NXT Users
Guide that comes with your NXT kit for specific information on display icons and
options
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32-bit ARM7 microcontroller (runs our code)
256 Kbytes FLASH, 64 Kbytes RAM
8-bit AVR microcontroller (controls sensors)
4 Kbytes FLASH, 512 Byte RAM
Bluetooth wireless communication
USB full speed port (12 Mb/s) (bits per second)
4 input ports, 6-wire cable digital platform
3 output ports, 6-wire cable digital platform
100 x 64 pixel LCD graphical display
Loudspeaker - 8 kHz sound quality
Power source: 6 AA batteries (How many volts is
this?)
The Touch Sensor gives your robot a
sense of touch. The Touch Sensor
detects when it is being pressed by
something and when it is released
again.
Suggestions for use
You can use the touch Sensor to make
your robot pick up things: a robotic arm
equipped with a Touch Sensor lets the
robot know whether or not there is
something in its arm to grab.
Port 1
The Sound Sensor makes your robot hear!
The Sound Sensor detects decibels. A
decibel is a measurement of sound
pressure.
The Sound Sensor can measure sound
pressure levels up to 90 dB – about the
level of a lawnmower.
• 4-5% is like a silent living room
• 5-10% would be someone talking some
distance away
• 10-30% is normal conversation close to
the sensor or music played at a normal
level
• 30-100% are people shouting or music
being played at a high volume
Port 2
The Light Sensor makes your robot see!
The Light Sensor is one of the two sensors
that give your robot vision [The Ultrasonic
Sensor is the other].
Reads reflection from a built-in IR emitter (the sensor responds to visible light and
into the IR spectrum) (default mode)
Or, reads light intensity from surroundings
with emitter turned off
A Calibration procedure is available to
accommodate variable lighting conditions
Port 3
The Ultrasonic Sensor makes your robot see!
The Ultrasonic Sensor is one of the two
sensors that give your robot vision [The
Light Sensor is the other]. The Ultrasonic
Sensor enables your robot to see and
detect objects. You can also use it to make
your robot avoid obstacles, sense and
measure distance, and detect movement.
The Ultrasonic Sensor measures distance
in centimeters and in inches. It is able to
measure distances from 0 to 255
centimeters.
Port 4
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Forward is Clockwise on an NXT motor
Note holes for Axles or other parts…
A Move block in the program controls both motors
The robot moves straight - motors will adjust speed as the robot
moves
 Recommend programming tests for straight and curved
movements, single and multiple Move blocks
Click Me
Right Wheel Motor : Port B
Left Wheel Motor : Port C
Third Motor: Port A
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