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  1. 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

  2. How to tell different colored objects apart in vision centerHow to tell different colored objects apart in vision center []
    First define three different sensors, putting each of the sensors on a different plane.

  3. What does it mean that the ROBOLAB 2.9 firmware is "100 times faster" than the old firmware?What does it mean that the ROBOLAB 2.9 firmware is "100 times faster" ... []
    Firmware is the RCX or NXT operating system software. It is to your RCX or NXT what Microsoft Windows, Apple Macintosh, or any flavor of Linux is for yo

  4. Which activities should I use first in my classroom?Which activities should I use first in my classroom? []
    First, make sure that your students have mastered sturdy LEGO building techniques. To bring everyone to a similar level of building confidence, it is a good idea to start with the learning sequence

  5. The program that runs on my RCX robot is not the one I downloaded.The program that runs on my RCX robot is not the one I downloaded. []
    Your program may be getting written over when someone else downloads to their RCX. Try to keep other RCX towers from

  6. Why am I having problems loading my program to my RCX?Why am I having problems loading my program to my RCX? []
    If you are getting this message it is because you are having trouble communicating between your tow

  7. What do I need to know about wiring icons together in ROBOLAB?What do I need to know about wiring icons together in ROBOLAB? []
    Here are some tips and tricks for wiring in

  8. How do you wire in a number (or constant)?How do you wire in a number (or constant)? []
    Under modifiers

  9. How to use different sensor containersHow to use different sensor containers []
    In order to do operations with various sensor values the first step is to get the sensor value into a container.

  10. My wheels spin, but the car does not move.My wheels spin, but the car does not move. []
    If the wheels are not touching the ground, use bigger wheels or move the motors and axles down.

  11. How can I plot frequency data from the NXT sound sensor?How can I plot frequency data from the NXT sound sensor? []
    One of the ports for the sound sensor data logging icon (found in Investigator Level 5) is "flat response." To plot sound frequency range data rather th

  12. I tried to use jumps and lands but nothing happened.I tried to use jumps and lands but nothing happened. []
    Check to see if the JUMP and LAND icons are in the correct positions. The first thing that happens in the following pro

  13. Construct a simple car using an angle sensor as a controller.Construct a simple car using an angle sensor as a controller. []
    Part 2: In Investigator level 5, program your car so that the motor speed (and direction) is determined by the angle sensor's value. The value of t

  14. Where can I get other sensors for the RCX?Where can I get other sensors for the RCX? []
    Three distributors of LEGO Mindstorms sensors are LEGO Education, HiTechnic Products, and Mindsensors. In addition to the light and touch sen

  15. How is direct RCX communication different than the remote program commands?How is direct RCX communication different than the remote program commands? []
    The direct RCX communication command sends commands that are executed immediately.

  16. How do I use subroutines?How do I use subroutines? []
    Subroutines are parts of a program that only run when the green 'start subrou

  17. My container function in ROBOLAB is not working.My container function in ROBOLAB is not working. []
    Make sure the correct containers are being referenced in the program. The program below does not work

  18. How do I use container.ctl?How do I use container.ctl? []
    There is, of course, always the case where it is useful to use more than the standard three containers. In this case it is useful to define your own c

  19. Create a program that will use the touch sensor to control the direction of the motors.Create a program that will use the touch sensor to control the direction of the ... []
    Use loops so that you can make your motors switch directions every time you press the touch sensor. Change the value "20" to the number of loop cycles y

  20. Create a pair of RCX to RCX communication programs, using mail to remotely control a vehicle.Create a pair of RCX to RCX communication programs, using mail to remotely contr... []
    1. Have RCX1 beep and wait for the touch sensor. After the touch sensor is pushed in it sends mail to RCX2.

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