LEGO Engineering ::

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My RCX car spins in place - Why won't it move? []
If the wheels are turning in opposite directions, the direction of a motor can
Why didn’t my RCX do what it was supposed to? []
If your program did something very strange or highly unexpected and you are s
How do I edit a wired in number? []
There are many different tools that can be used to edit various features in ROBOLAB. To cycle throu
Create an echo-locator. []
Similar to a bat with a sonar echo locator, this program uses light to measure distance, with sound as a feedback. Using your RCX or NXT, a
How do I use wait for container / timer / clock? []
There are many different 'wait for' commands, all of which can be found in the 'wait for' menu. Timers pause the program until the time has changed b
What issues should I consider before creating mixed-gender pairs? []
Boys usually have more experience building with LEGOs. Boys tend to jump into constructing and grab pieces before they think about what they will be doi
How do I save multiple ROBOLAB programs on the NXT, or rename rbl? []
To save multiple ROBOLAB programs to the
Can I see what a sensor is reading directly on the NXT brick? []
Yes. On the NXT you can see sensor values on the brick's display. Go to the View option. Then select whichever sensor you want to read and i
I used the gears with spikes (crown gears), and everything shakes. []
Problem: Crown gear does not run smoothly. Cause:
My car is driving backwards. []
If the car is driving in the wrong direction, you know that the wheels are turning in the direction that the prog
How do I load my data into ROBOLAB? []
If you are using Investigator in ROBOLAB, go to the circle of icons on the left side of your scr
When I use the long range IR setting with my Mac serial port transmitter, I get ... []
ROBOLAB does not support long range for the serial port IR transmitter for Macintosh computers. If you are using a serial port transmitter, use Short Ra
How do I use the direct RCX communication commands? []
Direct communication between RCXs requires that their IR ports be uncovered and facing each other. All of
Create an RCX car / creature that will play laser tag with other cars / creature... []
Each RCX will be assigned a number. It will then have to "tag" other RCXs with the number using mail, while avoiding tags from other competitors. A
Is there a way to log data at more than 100 Hz? []
There is currently no way to log faster than 100 Hz in ROBOLAB.
When I try to take data, my RCX shuts off! []
The RCX powerdown time may be set too low. In order for the RCX
Why is my RCX display counting up? []
The display on the RCX shows the amount of time that the RCX has been on. In ROBOLAB
How can I use the serial port of my Intel-based Mac with ROBOLAB 2.9? []
Intel Mac Users need to update their VISA drivers to NI-VISA Version 4.0 for Mac OS X in order to use the serial port with ROBOLAB 2.9. The
Is the ROBOLAB 2.9 firmware compatible with the NXT? []
Yes, RoboLab 2.9 has firmware for both the RCX and NXT. The confusion often arises from the fact that there are two different pieces of software to program the NXT - RoboLab 2.9 and the NXT softwar
What is the correct procedure to wire a single fork or multiple forks? []
Forks are a sign of choice in a program. Either the top line of the code is executed, or

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