line follower

I have connected an AXE121 to the 28 pin project boarrd. The light on the AXE 121 work according to the line but in the digital input there is no input shown.Also the program with inputs doesnt work on the bot.What may be the problem?

I have had an arduino for a wile now but i just cannot find out how to make a robot with line following and obstacle avoidance.

How can I write a sketch that will alow one sensor to have more power over another sensor? So if my robot is moving along a line and i put something infrunt of it it will sotp useing the line sensors and use the code for the obstacle avoidance.

111swords

hello everyone.

I am working on a robotic arm mounted on an autonomous robot. I am done with the line following part. and It tracks the line pretty well. controlled 2 DC geared motors via fastPWM from atmega16 using motor driver l298, used LDRs and LM324 comparators for the line following. all the programming is done in avr studio 4 and used ponyprog to burn the code in atmega 16.

Problem:

Hello everybody (I wonder if someone reads this thread :P )

I am an amateur builder and got the wrong components :P so now I am waiting for an LM386 for my Herbie's brain described here

http://www.beam-wiki.org/wiki/Herbie_line_follower

I was thinking of ideas for my second robot and I thought that a line following robot would be good. So I want to build an arduino line following robot. I was wondering what parts I would need to follow the black line. Also I am still decieding wether I want to build a small chasise, similar to the 3pi robot, or buy a ready made one.

- Mark  

Hello, everybody......

i really need your guidance. i m making a robot which have to performs two task: line following + box placing..

it must be heavy in weight, because of its body and robotic arm (for picking a box, sense its color and then place it in a chamber of same color )

http://www.nerc.com.pk/images/floorplan2.jpg

my first task is to select motors .....i search motors a lot but cant find best....my robot weight lie in this range 10 kg- 14kg

I'm about to modify my photovore to also give it line following ability, and have a couple of questions. I should mention I will be using LDR's.

1) What is the best colour LED to use to shine onto the floor, white, red or infra red?

2) Is it best to have the LED in front of the LDR, or to the side?

3) If to the side, should the LED be inside or outside the LDR?

4) Should the LDR be slightly lower than the LED or vice versa?

Thank you for your help.

This may sound like a dumb question, I'm afraid.

I'm planning on incorporating line following ability in my little robot, and wondered if there is a standard width of line used by everyone.

Obviously, I will allow tolerances, but don't want to mount the leds and ldr's too far apart, as presumably the bot will keep wandering from side to side. Conversely, too close and it will do the same (I imagine!).

Any suggestions anyone? (I know it's a bit like "How long is a piece of string" :)  )