LEGO Engineering :: :: light sensor don`t work

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Program a car to drive when the lights are off and stop when the lights are turn... []
One possible solution is below:
How to tell different colored objects apart in vision center []
First define three different sensors, putting each of the sensors on a different plane.
How do you program in ROBOLAB with an NXT rotation sensor in ports A-C? []
With the NXT, the rotation sensors are built into the motors, so they connect to the brick through ports A-C instead of ports 1-4. There ar
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
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
Construct a simple car using an angle sensor as a controller. []
...igator level 5, program your car so that the motor speed (and direction) is determined by the angle sensor's value. The value of t
Where can I find more information about ROBOLAB? []
For general information about ROBOLAB software, please see Using ROBOL
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
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.
Why is there a blank picture when I click on define sensor in vision center? []
When you click on define sensor you might only see a b
How do I data log two things at once in ROBOLAB? []
To data log with more than one sensor in ROBOLAB
Can I change the display on the NXT during my ROBOLAB program? []
Yes. With the Change View icon in the NXT Commands folder in ROBOLAB, you can change the display on the NXT. The display can be changed from its
When I use the "stop" command in ROBOLAB 2.9, the motors only coast to... []
In the initial version of ROBOLAB 2.9, the stop comand does not work properly. The NXT motors coast to a stop rather than stopping abruptly.
My program won't do what I told it to do! []
If the program seems to skip over a task, most likely there was no 'wait for' condition after the tasks in the program.
Using the Timer and RCX Display []
The RCX display block, found in the "RCX Communications" palette, is a great way to see what data the RCX is taking in. It can be used t
Which touch sensor data logging icon should I use in ROBOLAB? []
There are three different touch sensor data logging icons. All of the icons can be found under the Investigator folder. Each one is us
Is it possible to use other sensors with the RCX? []
There are a lot of other sensors that can be used in conjunction with the RCX, all of which can be found in the sensor adaptors list.
How do I wire task splits? []
Task splits allow the RCX and NXT to execute two tasks at the same time.
Write a program to make a car drive forward until the touch sensor has been pres... []
Use the "Loop While Number of Touches and Releases is Less Than" icon. A sample solution is below.
When I use the LEGO camera, I have shadows across my images. What can I do to ge... []
...f dark spots in your image then it is a good idea to build some sort of enclosed structure for your light.

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