Great video bro, but you don't need the switch block because both the true and negative operations the logic gate leads to are the same so You can simply use the operation within a loop block to achieve the same result, great tutorial video anyway keep up the good work
As always an absolutely great video. I have a question on the second math block you place. Why is the "B" value set to 1.5? I'm guessing it makes it proportional to the value needed for the correct turn using the motor, but I was curious how you came up with 1.5? Thanks again for posting, you are a very big help!
+worthenks That is what is known as a "Scalar value." The reason why it's used is because the light sensor has a known light range, but its highest numbers are too high to be used to steer the robot. So, we divide the light value by 1.5 to make sure our sharpest turns are not too sharp. This is something you can certainly fiddle around with and adjust based on your needs. A higher value in this box means smoother turns, a lower value means sharper corrections.
In what ports do you have the motors plug in. I did exactly what you did with my numbers I needed to follow the line and only one wheel is moving forward and the other is not doing anything.. Please help I need to get my EV3 ready for my class competition or else I will be disqualified..
Great videos, you actually don't need the switch though. it's identical... because a light value of (40) - 35 = 5 a left turn vs a value of (30) - 35 = -5 a right turn... the only need for the switch would be if you wanted to have a different scale factor for white vs black.
Hi Builderdude, Your videos are awesome, they are really helpful, but I need some more fll tips. My team is starting very soon and I need help! could you please give me some in the comments?
Sorry I should have been more specific, I would like some tips on all of the sensors, and the myblocks. My team is having difficulty with the myblocks espicially. thanks again, I will make sure my ENTIRE team subscribes to you.
That's easy enough, I happen to already have tutorials on each of the EV3 sensors, plus one on MyBlocks as well. Go check them out, they should help answer your questions.
hi i have a question which is VERY IMPORTANT (for me) you adviced to put the robot on the right side of the line at the timing 6:30 but the thing is that i have to make my robot line follow on the left side of the line then how to program that please do tell me bcoz i already said it is important for me thank you : )
That is the proportional constant, which you can adjust to make your robot more or less sensitive. So yes, you should experiment with changing it because the optimal number will be different for every robot.
Where did you get the software? I downloaded my software online but it does not have nearly as much applications as yours. Thank you for this video it really helps, but can you get back to me on my question really quick? Thank you again.
+SuavisSomnia You will need to download the blocks from their respective manufacturer's websites. Then, you import them into the EV3 Software through Block Import Wizard.
Did you use proportional line following in FLL too? If you did, did it prove somehow better than usual line following? I myself did and as it was quite useful and often used, I made some very flexible myblocks for it, allowing you to send in all the necessary information you would want, from outside the myblock, such as the motor speed, correction sensitivity and many more things. I will soon(-ish) make a Mindstorms Community post about it too.
***** Oh, wow, that sounds cool. The only time my team ever used line following was in Senior Solutions, and it was a program that someone else found of the internet. In Nature's Fury, my last year, I was team captain; we only used line squaring because there weren't an lines that were suitable for following.
Builderdude35 our program was actually too found off the internet, I just added an useful interface to the MyBlock so the same block could be used everywhere in all kinds of situations, without the need to make a new one for each occasion. We too used line squaring in Nature's Fury; however, not very often, as it used up quite some time from the 2:30 minutes.
Builderdude35 I personally would prefer 3-sensor following, which is a mixture of these two: the middle one is proportional and the 2 on the edges find out sharp turns and crossings etc, but that wouldn't be as much of a use in FLL as in regular line following. If you had 3 sensors, you could try that out too, see which one gives the fastest and most reliable line-following. Programming a 3-sensor following would be quite a challenge though, I haven't crossed that myself yet :P
What are the advantages of using 2 light sensors to line follower over only using 1? Based on watching most of your line following videos, it seems as if using 1 light sensor allows the robot to use a more accurate program like the one in this video or PID line following. It seems as if "1 line following" is better than "2 line following ". Can you help me confirm this theory?
I find that more color sensors makes your line follower more stable and more versatile, especially considering a proportional algorithm can be applied to a 2-sensor line follower. I even have a 3-sensor line follower tutorial coming up soon; that is hands down the most versatile line follower, because it can follow anything from straight lines to 90 degree corners. However, each person will need to decide what kind of line follower they need.
+Chirag Gupta Great question! The HT Color sensor will give you a wider range of colors to detect, and a much farther detection range. But if you don't need either of those, the EV3 sensor gets the job done just as well.
Builderdude35 Nice tutorials, but I have a few suggestions, first off, for screencasts use Open Broadcaster Software: obsproject.com/ Also, work on your profile pic a bit, it looks nice, but when you actually put it in your video it looks a bit out of place. Maybe try a flat version of it?
Builderdude35, why do you divide the light intensity from the first math block by 1.5? I need some help with that because I want to make sure it works and someone else from my team has the robot. Please reply to this and answer why.
That is a scale factor and it is meant to adjust the sharpness/smoothness of the robot's turns. Increasing the value makes turns smoother at the expense of maneuverability. Adjust accordingly to your own robot.
I was reading about PID controller to make this proportional line follower but you made it easier, thanks a lot.
thx dude..greetings from malaysia
thanks, i am probably gonna use the same robot as last year for fll, and that one had just one color sensor. now i can follow lines.
My FLL team made a PID line follower and a gyro follower. We used the gyro follower to follow in a straight line without using lines. It was awsome!
+Brian Raneri Nice! Sounds awesome!
+Builderdude35 What do we do if we want to turn sharply??
+bob xatzibasiliou what do we do if we want to trun sharply??
+ miguel t: the drive mortors are in ports B (left) and C (right).
+Builderdude35 thx man, eventually i needed to learn smooth ev3 linefollow for FLL.
+Builderdude35 why 1.5?
Mine's Animation PixelUser That's just what I determined through trial and error. That number can be adjusted to your needs.
Very good explained!
Audiultra Robotics Thanks!
Great video bro, but you don't need the switch block because both the true and negative operations the logic gate leads to are the same so
You can simply use the operation within a loop block to achieve the same result, great tutorial video anyway keep up the good work
Thanks, I'm glad you enjoyed the video! I am aware that the Switch is unnecessary.
Can You please teach us how to make a PID Line follower using a Hitechnic??
Hi Builderdude, Your videos are awesome, they are really helpful,
but I need some more wro tips especially wro football
Check some of my older tutorials, I have some WRO tutorials that can help you.
As always an absolutely great video. I have a question on the second math block you place. Why is the "B" value set to 1.5? I'm guessing it makes it proportional to the value needed for the correct turn using the motor, but I was curious how you came up with 1.5? Thanks again for posting, you are a very big help!
+worthenks That is what is known as a "Scalar value." The reason why it's used is because the light sensor has a known light range, but its highest numbers are too high to be used to steer the robot. So, we divide the light value by 1.5 to make sure our sharpest turns are not too sharp. This is something you can certainly fiddle around with and adjust based on your needs. A higher value in this box means smoother turns, a lower value means sharper corrections.
+Builderdude35 Thank you for your response and explanation, very helpful!
i had the same question but i guess he answered it
Are you on a FLL team? If so, which one? If you aren't, the how did you get a Nature's Fury map? (The map during the FLL competition in 2013)
I am not currently on an FLL team, but I competed in FLL from Food Factor to Nature's Fury with team Rocky Point Radical Robotix.
In what ports do you have the motors plug in. I did exactly what you did with my numbers I needed to follow the line and only one wheel is moving forward and the other is not doing anything.. Please help I need to get my EV3 ready for my class competition or else I will be disqualified..
Great videos, you actually don't need the switch though. it's identical... because a light value of (40) - 35 = 5 a left turn vs a value of (30) - 35 = -5 a right turn... the only need for the switch would be if you wanted to have a different scale factor for white vs black.
+Nathanael Nisbett Yes, you are correct. I figured the Switch made it easier for kids to understand.
You are very talented sir
Thank you!
Hi Builderdude, Your videos are awesome, they are really helpful,
but I need some more fll tips. My team is starting very soon and I need help!
could you please give me some in the comments?
Yes, I can give you some guiding advice, but remember it may be somewhat limited here. What was it you needed help with?
THANK YOU SO MUCH FOR RESPONDING!
I would,like, really appreciate some programming tips.
--Ashvin
Lead Programmer of Team Green Jazz
Sorry I should have been more specific,
I would like some tips on all of the sensors,
and the myblocks.
My team is having difficulty with the myblocks espicially.
thanks again, I will make sure my ENTIRE team subscribes to you.
That's easy enough, I happen to already have tutorials on each of the EV3 sensors, plus one on MyBlocks as well. Go check them out, they should help answer your questions.
Thanks for your help!
hi i have a question which is VERY IMPORTANT (for me) you adviced to put the robot on the right side of the line at the timing 6:30 but the thing is that i have to make my robot line follow on the left side of the line then how to program that please do tell me bcoz i already said it is important for me thank you : )
No problem! All you need to do is mirror the turning by negating the Kp value (this is the number you multiply by in the math block).
in the letter B the number will always be 1.5 or should it change for something?
That is the proportional constant, which you can adjust to make your robot more or less sensitive. So yes, you should experiment with changing it because the optimal number will be different for every robot.
Where did you get the software? I downloaded my software online but it does not have nearly as much applications as yours. Thank you for this video it really helps, but can you get back to me on my question really quick? Thank you again.
+SuavisSomnia I have the EV3 Home edition software. The only difference is mine has a few extra 3rd party sensor blocks that I installed myself.
+Builderdude35 Do you mind telling me how you installed them?
+SuavisSomnia You will need to download the blocks from their respective manufacturer's websites. Then, you import them into the EV3 Software through Block Import Wizard.
alright, thank you. Keep up the good work, because this you are every helpful
Did you use proportional line following in FLL too? If you did, did it prove somehow better than usual line following? I myself did and as it was quite useful and often used, I made some very flexible myblocks for it, allowing you to send in all the necessary information you would want, from outside the myblock, such as the motor speed, correction sensitivity and many more things. I will soon(-ish) make a Mindstorms Community post about it too.
***** Oh, wow, that sounds cool. The only time my team ever used line following was in Senior Solutions, and it was a program that someone else found of the internet. In Nature's Fury, my last year, I was team captain; we only used line squaring because there weren't an lines that were suitable for following.
Builderdude35 our program was actually too found off the internet, I just added an useful interface to the MyBlock so the same block could be used everywhere in all kinds of situations, without the need to make a new one for each occasion. We too used line squaring in Nature's Fury; however, not very often, as it used up quite some time from the 2:30 minutes.
***** Oh, okay. I thing I would personally go with my 2-sensor line following but I'm not sure; Maybe a comparison video is in order!
Builderdude35 I personally would prefer 3-sensor following, which is a mixture of these two: the middle one is proportional and the 2 on the edges find out sharp turns and crossings etc, but that wouldn't be as much of a use in FLL as in regular line following. If you had 3 sensors, you could try that out too, see which one gives the fastest and most reliable line-following. Programming a 3-sensor following would be quite a challenge though, I haven't crossed that myself yet :P
+Builderdude35 can you make a 2 sensor proportional line follower
Hi, thanks for your videos. May I ask where did you get your extra action blocks?
Well this is convenient timing; I just published a video on that topic yesterday! Check it out here: th-cam.com/video/MKXFIZPVgw0/w-d-xo.html
Can you make a tutorial on your fll robot, that would be helpful for building mine.
+Jack Harman I already have one. It's called "How to Build an FLL Robot."
+Builderdude35 ok thanks I didn't see it I'll have another look
thanks it is a rlly good video!
IKR
What are the advantages of using 2 light sensors to line follower over only using 1? Based on watching most of your line following videos, it seems as if using 1 light sensor allows the robot to use a more accurate program like the one in this video or PID line following. It seems as if "1 line following" is better than "2 line following ". Can you help me confirm this theory?
I find that more color sensors makes your line follower more stable and more versatile, especially considering a proportional algorithm can be applied to a 2-sensor line follower. I even have a 3-sensor line follower tutorial coming up soon; that is hands down the most versatile line follower, because it can follow anything from straight lines to 90 degree corners. However, each person will need to decide what kind of line follower they need.
do we have to keep -35 or -(Target value)
Hey dude,
What's better for line following? Hitechnic color sensor or normal ev3 color sensor?
Thanks a lot
+Chirag Gupta Great question! The HT Color sensor will give you a wider range of colors to detect, and a much farther detection range. But if you don't need either of those, the EV3 sensor gets the job done just as well.
Builderdude35 Nice tutorials, but I have a few suggestions, first off, for screencasts use Open Broadcaster Software: obsproject.com/ Also, work on your profile pic a bit, it looks nice, but when you actually put it in your video it looks a bit out of place. Maybe try a flat version of it?
Builderdude35, why do you divide the light intensity from the first math block by 1.5?
I need some help with that because I want to make sure it works and someone else from my team has the robot. Please reply to this and answer why.
That is a scale factor and it is meant to adjust the sharpness/smoothness of the robot's turns. Increasing the value makes turns smoother at the expense of maneuverability. Adjust accordingly to your own robot.
hello.can help us to program ev3 line following robot with one light sensor to turn any degree?thanks in advice
+Jyldyz Kydyrbaeva This is that video. Fine adjustment of this live follower will give you the results you want.
how you do more things
My sensor doesn't detect colors.
I'm new to FLL what are some tips?
Panda King Just look around my channel, there are tons of video tutorials for FLL!
K thanks
Is 1.5 for everything or just that ?🤓
Just for this specific robot. This number is different for each design and must be adjusted accordingly.
This doesn't work. Please help!
It works just adjust the kp setting. I had this problem. Hope it helped
väga tubli, väga tubli nohik oled!!!!!
😎