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goboto
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.

http://www.youtube.com/watch?v=EF7x7ePDuqw&feature=plcp

I (http://www.youtube.com/watch?v=EF7x7ePDuqw&feature=plcp) started off with the Rover chasis to lay everything onto.
http://gobotics.com/index.php?route=product/product&product_id=52

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.
http://gobotics.com/index.php?route=product/product&filter_name=arduino&product_id=100

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.
http://gobotics.com/index.php?route=product/product&filter_name=h-bridge&product_id=105

L (http://gobotics.com/index.php?route=product/product&filter_name=h-bridge&product_id=105)ink to the line sensors I used.
http://gobotics.com/index.php?route=product/product&filter_name=line&product_id=80

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.
http://gobotics.com/index.php?route=product/product&filter_name=line%20follower&product_id=107

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

jwatte
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!

goboto
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!
www.gobotics.com

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]