The Optimal Color Sensor Placement for EV3 Line Followers

[@roboteck5056]

Very instructive and comprehensive... as always. You‘ve definetely become our No. 1 source of EV3 tutorials! Please keep on going! One thing that‘s currently causing us headaches and might be worth another video... „How to detect junctions reliably with a 2-Sensor Line Follower?“.

[@Builderdude35]

Thank you! I'm glad to hear you're enjoying the videos. And for your question, I have a video for that already. The robot won't necessarily detect the intersection, but you can teach it to anticipate the intersection and continue on unaffected: kzbin.info/www/bejne/gonHnmljfNFjjac

[@roboteck5056]

We know this video already :-). We're still pursuing the dream of only using lines and intersections for navigation and not rely on any static motor control blocks which tend to become unreliable because the mat material, tires, dust, battery usage, etc. have considerable effect on the robot's reliability, hence we're trying to avoid this as good as we can. We were quite successful in our first WRO challenge following this approach, but we only used a single Sensor PID which wasn't as fast as a 2-Sensor follower but at least it was detecting intersections reliably (with another sensor... feel free to check our KZbin Channel and you will understand what I mean). Next time we'd like to compete using a 2-Sensor follower which is really fast like hell but we miserably fail to detect junctions reliably until now :-(

[@jayostuchanda3340]

hey do you have a video on how to keep the ultrasonic sensors accurate sensing? By the way the video was great.

[@Builderdude35]

Thank you. And to answer your question, I'm not sure that there's any way to affect the US sensor's accuracy or calibrate it like the Color sensor.

[@spaceybread]

Are you taking part in FLL this season?

[@Builderdude35]

No, I aged out of FLL a few years ago. I'm currently on an FTC team.

[@spaceybread]

Builderdude35 so will you ever be making tutorials for Android Studio Programming for FTC bots?

[@Builderdude35]

Most likely not.

[@rjs1292]

Can you make a video on exiting a loop with rotations

[@Builderdude35]

Try this video on Loop exits and adapt it for the rotation sensor: kzbin.info/www/bejne/lYq1qH5-hZmpbqM

[@nathanyang6185]

How do you use the gyro to aline the robot? Can you make a video about it?

[@Builderdude35]

Try this video (Drive straight): kzbin.info/www/bejne/p4GoZYyEqLmUmpY ANd this one (gyro following): kzbin.info/www/bejne/jYPCmKxmg651hdU

[@rjs1292]

Can you make a video on data logging

[@Builderdude35]

I will consider it. Thanks.

[@christopherkonstantoulakis9918]

make a video for grabbers for robitic competitions.for the 4x4 cubes with 2x4 bricks.

[@dluders]

www.flickr.com/photos/42988571@N08/albums/72157651837933061

[@Builderdude35]

Check out this video; it will be good for at least 4x4 cubes: kzbin.info/www/bejne/ZoOUaZ-qq66gjJI

[@w0ttheh3ll]

audio levels are too low :(

[@HAL9000Robotics]

First!!!!!!! Before 1 minute!!!

[@HAL9000Robotics]

Yep I get alerts!