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  1. questionDuring ROBOLAB 2.5.4 installation I get a dialog box stating that certain installations should be closed before continuing. I am given the choices Retry, Cancel or Ignore. What should I do?
    You should choose ‘Ignore’ or the RoboLab 2.5.4 installer will shut down. If you have already experienced this and have not completed the installation process you will need to uninstall and reinstall the program again.

  2. questionCan the NXT rotation sensor sense negative and positive rotation (counterclockwise and clockwise)?
    In other words: "the NXT-G Software doesn’t allow me to display negative numbers when I use the Rotation Sensor; what can I do about it?" The 'Switch' block can be used to check if the rotation sensor has turned past a specified position in a specified direction. Specifying below zero degr ...

  3. questionWhat is the NXT-G Compare block for?
    The Compare block (located in the 'Data' section in the 'complete palette' tab on the left side of the screen) is used to compare two numerical values. It outputs 'true' or 'false' depending on whether the condition chosen in the configuration panel is satisfied. The attached program, compare.rb ...

  4. questionIn NXT-G, how can I write a program to command a 2-motor car to drive straight until it reaches a black line?
    One way to program an NXT car to stop on a black line is to use the switch block to constantly check the light sensor for darkness. In this program, a switch block tells the NXT to constantly check the input from the light sensor. As long as it senses light, motors B and C drive the car forwar ...

  5. questionInstalling Mindstorms NXT-G on Mac OS 10.6 (Snow Leopard)
    This seems to be an issue with the installer. If you already had Mindstorms NXT-G installed before you upgraded to Mac OS 10.6, everything should work fine. The latest workaround is listed below: This works for LEGO MINDSTORMS NXT Software version 1.1 and 2.0, both EDU and Retail versions. 1. Co ...

  6. questionCan I make my car go slower or faster?
    Yes, you can change the power setting on the motor icon when writing the program. This will effectively control the speed of the motors on your vehicle. Also, if the car is going slower than expected, you may have low batteries, which can be changed.

  7. questionHow can I program my NXT to play a song?
    To play a song on your NXT, use the 'play sound' icon. Once this is within your program, you have two options: Firstly, there are many pre-programmed songs and sounds from which you can choose, so if one of those fits your needs, then you're all set! Secondly, you can string together multiple s ...

  8. questionHow do I upload data from the NXT to the NXT-G?
    By using the 'NXT window' button located near the download button, you can access the memory section of the NXT. Here, under the memory tab, you can view the files that are on the NXT, select your desired file, hit the Upload button, and choose where to save it.

  9. questionHow can I command my NXT car to move only when the sound in the room is more than a certain decibel level?
    The most efficient way to do this is to use a sound switch. The only difficult part is to figure out what sound level (on a scale of 1-100) your threshold decibel level is. This can be done easily by running the program while your NXT is plugged into the computer and checking the current sound ...

  10. questionDoes NXT-G have anything similar to events? How can I write a program that runs a whole sequence of tasks while waiting for a certain sound level to bring everything to stop?
    Unfortunately, NXT-G has no equivalent to the RoboLab event. The way to get around this is to use the beams to have multiple tasks executing at the same time. If you have more than 3 tasks, hold down the shift key while using the select tool to grow additional task beams off of the original thre ...

  11. questionHow do I install the LEGO MINDSTORMS NXT (NXT-G) 1.0 software on Windows Vista?
    The installation will be very similar to installing the software on Windows XP with these exceptions: 1. When the installer launches, Windows Vista will require you to acknowledge running ‘autorun.exe’ (if you are logged on as a Admin user) or to provide Admin credentials (if you are ...

  12. questionWhat is the NXT-G Range block for?
    The 'Range' block (located in the 'Advanced' section in the 'complete palette' tab on the left side of the screen) is used to determine whether an input number, called the 'test value', is within the specified range. To configure it, adjust the two sliders in the block’s configuration pan ...

  13. questionHow do I use the NXT orange and gray buttons as sensors or inputs?
    First, click on the Complete Palette tab at the bottom of the programming screen to change your menu of programming blocks to the fuller set. Then move your mouse over the yellow icon that represents the Sensor menu. Next, click on the NXT Buttons graphic (it looks like a square and two tria ...

  14. questionHow can I the NXT-G Timer block?
    The Timer block (located in the 'Sensor' section in the 'complete palette' tab on the left side of the screen) can be used to access the internal timer of the NXT. In the attached program example, the Timer block is used to put the motors into reverse after a certain amount of time has passed. P ...

  15. questionWhy can’t I display a number on the NXT screen?
    The 'Numbers to Text' block (located under the “Advanced” section in the 'complete palette' tab on the left side of the screen) is used to convert a number into printable text. For example, in order to display a random number on the NXT screen using the Random block, you need to conv ...

  16. questionAre there any tricks for using the logic output from the rotation sensor block in NXT-G? My green data wires always turn grey. What might I be doing wrong?
    Example: There are two connections under the Rotation Sensor block. One is logical (true/false) and the other is numeric. As the example shows, wiring logical to logical leaves a green wire; wiring logical to numeric leaves a grey wire. A grey wire indicates a badly connected wire. All of the o ...

  17. questionDoes Mindstorms NXT (NXT-G) 1.0 run natively on Intel-based Mac systems?
    No, Mindstorms NXT 1.0 currently runs in emulation mode on Intel-based Macs. A new version of the Mindstorms NXT software that runs natively on an Intel-based Mac will be available in the summer of 2007.

  18. questionWhy did I lose my data on the NXT when data logging?
    When data logging (possible with ROBOLAB 2.9 software but not with NXT Mindstorms software), if the NXT is shut off before the data is loaded onto the computer, the data is lost. This often happens because the sleep function on the NXT is turned on and set at a low setting. To fix this problem ...

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