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Stephen Brogan

LEGO.com MINDSTORMS : Products - SENSORS - 9843 - 1 views

  • 9843 9844 9845 9846
    • Joshua Wilkinson
       
      is it posssible to use at least two of these on the robot, or is there not enough ports on the nxt
    • Thomas Helm
       
      im very sure that you can use more than one sensor but ill see if i an find something on it now
  • The Touch Sensor reacts to touch and release, enabling your LEGO® MINDSTORMS® NXT robotic creation to "feel" like never before! It can detect single or multiple button presses, and reports back to the NXT Intelligent Brick
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    Interactive sensor database
Anthony DiVirgilio

LEGO.com MINDSTORMS : Products - SENSORS - 9846 - 2 views

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    this sensor is able to detect proximity
Thomas Helm

LabVIEW Add-ons for LEGO® MINDSTORMS® NXT - Developer Zone - National Instrum... - 5 views

    • Alexander Laferriere
       
      this shows how to turn on a motor if the button is pressed so if it is not pressed it will stop
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    LabVIEW Toolkit for LEGO MINDSTORMS NXT Program and control NXT devices with the full power of LabVIEW Get real-time updates from the NXT device during program operation with LabVIEW front panels Create native blocks for LEGO MINDSTORMS NXT software Figure 1.
Nick Laferriere

Programming Solutions for the LEGO Mindstorms NXT - Which approach is best for you? | R... - 1 views

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    Programming Solutions for the LEGO Mindstorms
Bryan Kelleher

LEGO.com MINDSTORMS : Community : NXTLOG - 4 views

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    the way the ultra sonic sensor is set up is a good idea
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    I feel the way they set up the light sensor is a little to far out
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    we are gonna have to place the ultrasound or light sensor under three inches if we are following the inside walls, but thats an individule decsion. we could use a code similar to the wall following code in the romba project.
Joshua Wilkinson

LEGO.com MINDSTORMS : Community : NXTLOG - 1 views

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    another take on a wedge design with what appears to be a bumper guard on the back.
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    great idea
Alexander Laferriere

LEGO - 9 views

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    sorta of a change in design than the last one i had thought was good
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    this looks like it wikll work
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    this is a good idea but it would be hard to change the gears in a short amount of time
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    this might be a possible solution but it might not have enough power to make it up the 22.5 degree incline.
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    looks good
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    Great pictures Tommy. We can use some of these ideas to build our robot
Anthony DiVirgilio

LEGO.com MINDSTORMS : Community : NXTLOG - 8 views

  • This is a simple dual worm gear drive. It turns two turntables using two worm gears spinning in the same direction at the same speed using one motor. It was really quite easy to build.
    • Anthony DiVirgilio
       
      this could be really helpful
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    how to use a worm gear
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    this will be helpfull
Jarid Brogan

The NXT STEP - LEGO® MINDSTORMS® NXT Blog: Datalogging with NXT-G - 0 views

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    description of datalogging
Declan Coen

Log Red Dataset - LabVIEW 2009 LEGO MINDSTORMS NXT Module Help - National Instruments - 4 views

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    LabVIEW 2009 LEGO MINDSTORMS NXT Module Help Logs Data from the specified sensor connected to the specified port. The data logging parameters are sample time and total time.For the Red Vis, the data is stored in the RedData.dat file on the NXT brick and can be viewed using the Data Viewer application.
Thaddeus McKeon

LEGO.com MINDSTORMS : Community : NXTLOG - 1 views

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    this robot simiulates sweeping motion
Declan Coen

PID Controller For Lego Mindstorms Robots - 7 views

  • light sensor "sees white" then we know it is left of the line's edge (and the line). If it "sees black" then we know it is to the right of the line's edge (and on the line). This is called a "left hand line follower" since it is following the line's left edge
  • We need to know what values the light sensor returns when it "sees white" and when it "sees black". A typical uncalibrated sensor might give a "white" reading of 50 and a "black" reading of 40 (uncalibrated, on a 0 to 100 scale). It is convenient to draw the values on a simple number line to help visualize how we convert light sensor values into changes in the robot's movement.
  • Below are our made up light values for white and black.
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  • We'll just divide the range into two equal pieces and say that if the light level is less than 45 we want the robot to turn left. If it is greater than 45 we want to turn right. I won't go into how exactly the turns should be done. I'll just say that gentle turns work well for a fairly straight line
  • line with lots of curves usually needs to be making sharper turns. For gentle turns you might use Power levels of 50% on the fast wheel and 20% on the slow wheel. For sharper turns on a curvy line you might need to use 30% power for the fast wheel and coast or brake the slow wheel. Whatever power levels you use the numbers will be the same for the two turns, you just switch which motor gets the big number and which get the smaller number (or a stop command).
  • This type of a line follower will follow a line but it isn't very pretty. It looks OK on a straight line with with the motors programmed for gentle turns. But if the line has any curves then you have tell the robot to use sharper turns to follow line. That makes the robot swing back and forth across the line. The robot only "knows" how to do two things; turn left and turn right. This approach can be made to work but it is not very fast or accurate and looks terrible.
  • In the above approach the robot never drives straight, even if it is perfectly aligned with line's edge and the line is straight. That doesn't seem very efficient does it? Lets try to fix that. Instead of dividing our light value number line into two regions lets divide it into three.
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    seems useful for following a line effectively
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    this is a really good technique
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    the top of this article explains how it would be easier to follow the edge of the line rather than the center of the line. As it detects the white it will turn back to the black and as it detects the black it will turn back to the white.
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    i found the edge thing on another site too
Anthony DiVirgilio

Fuzzy Line Following NXT Robot - 5 views

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    One of the tutorials within the Lego Mindstorms NXT Software shows how to program a robot that follows a line using Boolean Logic. In the following, an improved version, based on Fuzzy-Logic, is presented. Although a little bit more complex, the program is still implemented using NXT-G Code.
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    this has some good ideas
Thomas Helm

Line Follower - LabVIEW for Lego MINDSTORMS Projects - 3 views

  • 3. In case the lighting in the room changes, could you program your line follower to re-calibrate the light sensor when you push a button?
    • Thomas Helm
       
      could b useful later on to look into
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    Tufts University Center for Engineering Education and Outreach In this activity, we will learn how to create a robot that follows a line on the ground. It will use one light sensor to sense where the line is, and use this to control the motors to steer the car and stay on the line.
Thaddeus McKeon

Building Robots with LEGO® Mindstorms® NXT > Solving a Maze > Building a Maze... - 1 views

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    I know it doesn't say much but this single-motored nxt can rotate it's ultrasonic sensor allowing it to see multiple walls at once
Alexander Laferriere

RoboChallenge - 3 views

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    some good ideas for design
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