NXT Sensors
As you can see, there are 4 different types of NXT sensors. The first is a touch sensor , the second light, the third sound, and the fourth ultrasonic as demonstrated in the image above. Another, and possibly the most important sensor, is the servo motor/rotation sensor that is not in the first picture but in the second picture to the right.
Touch sensors gives your robot a sense of touch to be able to detect when something is being pressed against it. Not only that, but the touch sensor also gives your robot the potential to pick things up and even perform actions on command. For example, your robot could, with the correct programming, walk, talk, close the door, turn a TV on and as previously established, pick things up
The light sensor is one of the two sensors that allows your robot to see. The sensor allows your robot to distinguish between light and dark giving it the ability to measure light intensity of surfaces in a room and the light intensity of the room itself. These sensors would be very useful to use as an alarm in the case of an intruder. Once the intruder turns the lights on, the robot will be able to react to defend its property. Also, you can design a robot to follow lines of color or sort things in colored categories.
The sound sensor is also very useful. It can measure sound pressure levels to up to 90db (a db is a measurement of sound pressure that can hear sounds very high or very low, too much for the human ear to hear.) Whats best is that the NXT robot simplifies the measurements of sound to the degree of making it very easy for people to understand the degree of sound. The way it measures sound is by percents, the lower to percent the quieter the sound. For example, 4-5% percent would be a silent living room, 10-30% would be someone speaking at a normal level near the microphone, and 30-100% would be shouting or loud music playing near the microphone.
The ultrasonic sensor is the second sensor that gives the robot the ability to see. It gives your robot the ability to see and detect objects in order to avoid obstacles, sense and measure distance or detect movement. Just like bats, these sensors use sound waves to detect motion. The bigger and more flat the surface, the better the readings.
Finally, there is the servo motor or rotation sensor, as some call it. This motor controls the precision of the robot's movement by measuring it in degrees of 360 for a full turn and 180 for a half turn.
Touch sensors gives your robot a sense of touch to be able to detect when something is being pressed against it. Not only that, but the touch sensor also gives your robot the potential to pick things up and even perform actions on command. For example, your robot could, with the correct programming, walk, talk, close the door, turn a TV on and as previously established, pick things up
The light sensor is one of the two sensors that allows your robot to see. The sensor allows your robot to distinguish between light and dark giving it the ability to measure light intensity of surfaces in a room and the light intensity of the room itself. These sensors would be very useful to use as an alarm in the case of an intruder. Once the intruder turns the lights on, the robot will be able to react to defend its property. Also, you can design a robot to follow lines of color or sort things in colored categories.
The sound sensor is also very useful. It can measure sound pressure levels to up to 90db (a db is a measurement of sound pressure that can hear sounds very high or very low, too much for the human ear to hear.) Whats best is that the NXT robot simplifies the measurements of sound to the degree of making it very easy for people to understand the degree of sound. The way it measures sound is by percents, the lower to percent the quieter the sound. For example, 4-5% percent would be a silent living room, 10-30% would be someone speaking at a normal level near the microphone, and 30-100% would be shouting or loud music playing near the microphone.
The ultrasonic sensor is the second sensor that gives the robot the ability to see. It gives your robot the ability to see and detect objects in order to avoid obstacles, sense and measure distance or detect movement. Just like bats, these sensors use sound waves to detect motion. The bigger and more flat the surface, the better the readings.
Finally, there is the servo motor or rotation sensor, as some call it. This motor controls the precision of the robot's movement by measuring it in degrees of 360 for a full turn and 180 for a half turn.