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If you're asking about what sensor these robots are using to follow the line, most of them are using some version of our QTR sensors: www.pololu.com/qtr

We make our tracks out of 4x8ft sheets of white hardboard (sometimes labeled as Thrifty White tile board or panel board) that you can find at most big box hardware stores like Home Depot and Lowe's.

Some of the robots used a laser-cut acrylic chassis. You can see more information about most of them in the blog posts linked above.

I am not sure what specifically you are proposing, so it is difficult to comment on how it would work. Our reflectance sensors should be responsive enough to work at high speeds, so more significant than changing sensors is optimizing your robot geometry and control algorithm. If you need help with your robot, you might try posting to our forum: forum.pololu.com/

You can find a write-up on Brandon's robot here: www.pololu.com/blog/547/brandons-mini-sumo-robot-black-mamba

We are not exactly sure what you are asking, but if you are wondering about the cost of a specific robot, most of them are custom made, so we don't know the exact costs. The exception being the Zumo robots, which you can find here: www.pololu.com/category/129/zumo-robots-and-accessories

Sure! This is a challenging task, but it should be doable with a variety of robotics platforms. Note that on the hardware side, wheel encoders are almost essential, and on the programming side, you'll need to do a lot of advanced array manipulation.

These robots all use motor drivers, which allow you control the speed and direction of the motors using signals from a microcontroller.

Could you please help me with the code?

@@avijitpal1421 For help with code, please post to our forum: forum.pololu.com/

Hi Todd. We have some example code for solving a maze without loops here: www.pololu.com/docs/0J21/8 Sections 8.d and 8.e discuss how to record, store, and simplify the robot's path through the maze. Looped mazes like the one in the video above are more difficult to work with, and unfortunately, we don't have any documentation or example code for them. However, one of our engineers did share his own code for solving a looped maze with a 3pi robot in this forum post: forum.pololu.com/t/3pi-looped-maze-solver/3269/3

For questions like these, please post to our forum: forum.pololu.com/

For questions like this, please post to our forum: forum.pololu.com/

You can see links to the write ups for some of the featured robots in the video's description above (to display the full description, click "SHOW MORE"). If you have specific questions about our products, you can post questions on our forum: forum.pololu.com/

We just updated the video description with links to blog posts about some of the robots in the video.

There are many factors that can affect the speed of a line following robot and which of those are reasonable or convenient to adjust depend on the specifics of your robot. If you post more detailed information about your line follower (e.g. what motors you are using, how you are supplying power, diameter of your wheels, etc.) on our forum, we can help you there: forum.pololu.com/

There were several controllers used for the bots in this video; there is a link in the description to a blog post with more details: www.pololu.com/blog/493/video-lvbots-april-2015-line-following-competition

This video's description section has a link to our blog post about the competition. That blog post has links to other posts about the individual robots where components are shown and the code for some of them is shared.

We used Challonge to make our competition bracket: challonge.com/

Pololu People Thanks

This video's description section has a link to our blog post about the competition. That blog post has links to other posts about the individual robots where the code for some of them is shared.

The majority of the robots used our micro metal gearmotors, which vary in gear ratios and motor types. You can find a complete table listing all the options on our Micro Metal Gearmotors' category page: www.pololu.com/category/60/micro-metal-gearmotors. You can also find more information about some of the robots featured in the video in the blog post we link to in this video's description section.

Pololu People Thank you so much for replying

@@madpenguin_mx the motor name is polulu. Lol

Glad you liked it! We used stopwatches and verified later with the video footage.

We do not have any recommendations for where you can buy line following courses, but here is a guide we have written for making your own course: www.pololu.com/docs/0J22/all

None of the line following code for the robots in the competition that used Arduinos is available. However, to get started on your own program you might consider reviewing the line following example for our Zumo 32U4 Robot, which has the same microcontroller as the Arduino Leonardo. The example line following sketch is called LineFollower.ino, and it is a part of the Zumo 32U4 Arduino library: github.com/pololu/zumo-32u4-arduino-library If you have specific questions about that code, please post to our forum: forum.pololu.com/

@@pololupeople which motor are used for LFR

@@magarajanamagarajanarunach6661 These line followers all use different motors, though most of them are probably using some version of our Micro Metal Gearmotors. For a specific example, Ben's robot, Mostly Red Racer, uses the medium power 30:1 gearmotos with 70mm wheels and is powered at 9V. (The 9V is through a regulator, not from a 9V battery, which wouldn't be a good choice for a robot because of its small current capacity). Here are the motors and wheels: www.pololu.com/product/2364 www.pololu.com/product/1426