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  1. What is the NXT-G switch block for?What is the NXT-G switch block for? []
    The 'switch' block allows you to set different actions to occur according to the state of a certain input. Here is an example of how the NXT switch bloc

  2. My HiTechnic acceleration sensor doesn't work with ROBOLAB.My HiTechnic acceleration sensor doesn't work with ROBOLAB. []
    ...is an issue with using the HiTechnic acceleration sensors with the ROBOLAB firmware. The sensor does...ensors with the ROBOLAB firmware. The sensor does work with ROBOLAB, but only when you do not u

  3. Why would I need to use logic inputs and outputs in NXT-G? What is an example of a program that uses logic inputs and outputs?Why would I need to use logic inputs and outputs in NXT-G? What is an example of... []
    The logic block in NXT-G is essentially used to combine two or more true/false signals into one true/false value. For instance, you can have a motor cha

  4. How can I gradually increase the speed of my motors (i.e., make my car accelerate slowly) in NXT-G?How can I gradually increase the speed of my motors (i.e., make my car accelerat... []
    The only way to adjust the power level during a program is to have it wired to some sort of varying function. The motor block, like many blocks in NXT-G

  5. What is the Variable block for?What is the Variable block for? []
    The Variable block (located in the 'Data' section in the 'complete palette' tab on the left side of the screen) is used to store information for later u

  6. How can I do I combine the values of different sensors in NXT-G? For example, how could I program the motors to start only when there is combination of a loud sound AND a bright light?How can I do I combine the values of different sensors in NXT-G? For example, ho... []
    Sensor values can be easily combined using the wiring ports on the sensor blocks. The sensor blocks are different from the 'wait for' blocks, as they ha

  7. I have purchased earlier LEGO® Control products. Can I use any of these with the Mindstorms® sets?I have purchased earlier LEGO® Control products. Can I use any of these with th... []
    Any 9 volt motor, lamp or sensor purchased earlier will also work with the RCX and the ROBOLAB syste...

  8. What is the NXT-G Compare block for?What 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.

  9. What is a container?What is a container? []
    Containers are like variables, and are used to store values. They can keep count of how many times something has occurred and be referenced as a value.

  10. In NXT-G, how can I write a program to command a 2-motor car to drive straight until it reaches a black line?In NXT-G, how can I write a program to command a 2-motor car to drive straight u... []
    ...s to use the switch block to constantly check the light sensor for darkness.

  11. My NXT won't respond to my light sensor.My NXT won't respond to my light sensor. []
    ...alue in the program is wrong. The light sensor works by measuring t...

  12. What is the NXT-G Range block for?What 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

  13. Are 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?Are there any tricks for using the logic output from the rotation sensor block i... []
    Example:

  14. Help! My ROBOLAB 2.9 serial number doesn't work.Help! My ROBOLAB 2.9 serial number doesn't work. []
    ROBOLAB 2.9 is an upgrade product. The installer for ROBOLAB 2.9 asks that you enter the serial number from a previous version of ROBOLAB (2.0 - 2.5.4). The number is printed on your 2.5.4 or earlier...

  15. Appendix 7-LEGO MINDSTORMS NXT Ultrasonic Sensor I2C communication protocol.pdfAppendix 7-LEGO MINDSTORMS NXT Ultrasonic Sensor I2C communication protocol.pdf []


  16. Appendix 4-LEGO MINDSTORMS NXT Sound Sensor hardware schematic.pdfAppendix 4-LEGO MINDSTORMS NXT Sound Sensor hardware schematic.pdf []


  17. Appendix 5-LEGO MINDSTORMS NXT Touch Sensor hardware schematic.pdfAppendix 5-LEGO MINDSTORMS NXT Touch Sensor hardware schematic.pdf []


  18. Appendix 6-LEGO MINDSTORMS NXT Ultrasonic Sensor hardware schematic.pdfAppendix 6-LEGO MINDSTORMS NXT Ultrasonic Sensor hardware schematic.pdf []


  19. How do I use the mail command on the RCX?How do I use the mail command on the RCX? []
    The RCX is always ready to receive mail which means that all you need to do to send a mail value is

  20. Why do I need to zero sensors and containers?Why do I need to zero sensors and containers? []
    Container values are global, meaning they are not automatically reset when a new or different program is opened. Sometimes there are values left in t

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