View Full Version : Gobotics Rover Line Follower

10-18-2012, 07:05 PM
Hey guys, this is my first post on the forums out here so hopefully its helpful to someone. I think it came out pretty well if I do say so myself :veryhappy:

I'm in the startup of a robotics company called Gobotics and we are trying to get our word out in the open, so any help or feedback is appreciated.

Anyway, my first project was a putting together a line follower kit, and it came out pretty great after a few improvements to the coding.


I (http://www.youtube.com/watch?v=EF7x7ePDuqw&feature=plcp) started off with the Rover chasis to lay everything onto.

I (http://gobotics.com/index.php?route=product/product&product_id=52) also used an arduino to control the input from the sensors and relay it to control the left and right motors.

W (http://gobotics.com/index.php?route=product/product&filter_name=arduino&product_id=100)e have a pretty solid H-Bridge motor driver that seemed to do the trick for going forward, reverse, left, and right.

L (http://gobotics.com/index.php?route=product/product&filter_name=h-bridge&product_id=105)ink to the line sensors I used.

A (http://gobotics.com/index.php?route=product/product&filter_name=line&product_id=80)ll in all it came out to a good first project. Im working on a few other solutions at the moment also, so anything you guys would like to see a cool demo of just let me know, i'm also happy to help if you have any questions about our site. [email protected]

I also put together an all-in-one solution bundle if you want to take a look. It includes everything needed to get started, as well as 3 ir distance sensor modules to try to avoid obstacles as well as following lines.

Any feedback is appreciated, hope you guys find some good ideas and products on our site. www.gobotics.com

10-18-2012, 07:43 PM
Good for you -- I hope you have lots of fun!

I think the traditional line follower would be a lot better with a three-way sensor up front. It can sense if the line is turning left or right, and then turn without slowing down as much. I wonder if there's a good low-cost sensor that could do this...

Regarding your products, there seems to be a glut of hardware that addresses the under-2A space, probably because it's fairly easy to design for. There's not a whole lot to tell your L298 controller apart from pretty much any other.

What I wish someone would solve is the "ohmygawd I need 12V 20 Amps max with 10A average out of a 4S LiPo!!!" problem. Most off-the-shelf solutions cost $200 or more, and are pretty heavy because they come with chassis etc, because they're for medical equiment or photocopiers or whatever.

The same thing goes for motor controllers -- a pair (or quad) of 6A motors are pretty easy to get, but the control circuitry not as much. And it's really not *that* hard -- the MOSFET devices you need to drive these are each in the sub-$1 class if you get enough of them (and $2 or so in handful quantities.) I'm thinking an ATTiny84 plus two hi/low MOSFET drivers plus four N-channel power MOSFETS would make a great motor controller, and while I can solve one on stripboard at home, a properly tested, robust solution on a real PCB would be useful, IMO.

Anyway, good luck on your project!

10-19-2012, 04:11 PM
Thanks jwattte!
I appreciate you feedback, it really helps a lot! I will look in to possibly laying out a simple H-Bridge with a larger amp rating.

As for the line follower, I actually did use a solution with three line sensors mounted to the front.

Our team decided to put out a special offer for members of the Trossen community, so come and give us a look!

If you guys use the code "TROSSEN10" we will give you 10% off your order of $30 or more!

We are really trying to gain some momentum, so don't hesitate to email us or message me with any questions, and mention us to your friends! [email protected]