Spark Track detail Each course runs for three months and starts at the beginning of a quarter.
The ultrasonic sensor is not attached in this design. Unlike balancing robots that use a gyroscopic sensor or other special sensors, this design uses only the light sensor, which does not know which way is "up" in an absolute sense, so it can only guess on its relative tilt based on the amount of reflected light received from the ground.
As a result, getting a good balance is a bit of a challenge when you are using it. Please read the following important tips. Getting the NXT Segway with Rider robot to balance requires good lighting and surface conditions for the light sensor, and also requires that you start the robot exactly balanced to begin with, so be prepared to experiment with different surfaces and lighting, and also some practice at getting the robot started out balanced to begin with.
Here are some tips: Software and Firmware Versions. The standard NXT-G 1. If you are using an older firmware for the corresponding software, you can download an update here. External room lights can confuse the light sensor, especially if the amount of lighting or shadow varies as the robot moves around.
For best results, find a location where the light sensor will be in shadow from any room lights, even as the robot moves forward and backward by a couple of feet in either direction.
Also, florescent lights will interfere less than incandescent lights. The robot requires a surface that has very uniform brightness.
Blank white paper will work well, or any surface that is a uniform solid color with no pattern. A wood floor with a wood grain pattern, or a tile floor with texture will not work well, because the light reflection will vary as the robot moves.
Since the light sensor cannot tell which way is up, the robot must start perfectly balanced to begin with, and then the program will try to maintain that balance position by trying to seek out the same reflected light reading that the light sensor had at the beginning of the program.
Specifically, the robot must be physically balanced, which is not the same as holding it visually straight up.
If you just hold it upright with your hand, it will not be physically balanced. At the beginning of the program, the program will beep three times over three seconds, to give you time to get the robot balanced with your hands, then it measures the position at the 4th higher tone beep, so the goal is to have it perfectly balanced at the 4th beep.
Then it starts to try to stay balanced automatically. Note that if you start the robot very close to but not quite balanced, it will drive forward or backward in the direction that it was leaning at the start.
Getting a good start may require some practice, so be patient! A good way to start the robot balanced is to start the program, then during the three beeps, support the robot only by the top of the driver's head ultrasonic sensor very lightly using one finger and thumb with an open gap, trying to keep the robot from leaning to either side very much at all.
Both of these programs balance the robot using a form of "PID Controller".NXT-G Programming Workshop for FLL Coaches Developed by Tony Ayad Updated by LeRoy Nelson California - Los Angeles Region FLL September Outline.
With Lego Mindstorms NXT for Teens first-time programmers will learn to create programs that bring Lego creations to life!Features This book provides the reader with both a programming foundation and a basic overview of robotic development.
Readers will learn how to program using Mindstorms NXT-G programming language.
Paused You're 4/5(1). NXT-G is a great first programming language, but that doesn't mean it's easy to understand—at least not right away.
In The Art of LEGO MINDSTORMS NXT-G Programming, author and experienced software engineer Terry Griffin explains how to program MINDSTORMS robots with NXT-G. Writing Efficient NXT-G Programs Programming Techniques Loops and My Blocks Even with automatic code re-use, every copy of every block in your program uses up.
Classroom Resource: NXT-G Software Troubleshooting Tips. Submitted by Randy Steele on 25 May, - Printer-friendly version · Turn off robot educator or use patch if NXT-G (the programming interface) is running very slowly (Macintosh).
Mindstorms NXT-G The Color Sensor can be programmed using LEGO Mindstorms NXT Software Color Sensor Block. The Color Sensor Block is designed to support the HiTechnic Color Sensor.