Let's Make Robots!

line follower

Its a sumo bot, line follower, and object avoidance, all in one little package.
Using a
   This robot is a rebuild of my Start Here Robot.  One day I was looking for things to do(other than clean my work bench) and saw my my SHR sitting there and … Read more
Linea is my first line follower based on Arduino.A line follower is a robot for beginners. In fact it is very simple to build a line follower and only few … Read more
Hi All, Five months ago I decided to make a small and simple line follower. It would be my very first robot, and I had to learn from the basis. Five months later, … Read more
Spurt is a brainless line following Beambot. It is based on the Spurt-Mobil from the University of Rostock / Tech. University of Berlin. It is a very cheap robot … Read more

Parts for Line following robot

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  

this is my first line follwing bot.I have not do complex track tests.the video show three behaviors : black line follwing,stop at line end,obstacles quiet. Read more

Peg placing robot

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 )


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

This is a simple robot made from a kit I bought from a local electronics shop. I have made a simple line follower program for it and thought I would upload it here … Read more
Follows a line and navigates a course.
Using a
Hey guys I recently found all my documentation for an old line follower we had to do for a first year course at my university. We did these in teams of 4. I built … Read more
Simple object/light avoidance, and line follower.
Using a
  UPDATE 19/11/2010 As promised, I've added a short video of some of the functions I can use RDP-01 for. I know they're not brilliant, but at least I am beginning … Read more

I would like some advice on Line Following robot please

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.

What is the width of a line?

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" :)  )


i got the 3pi robot from my friend for yet unspecified time :) so i plan to play with it a bit, put some more sensors on top and as it is usual with my projects make it able to follow line with obstacles course as well as navigate maze. i had to come with some name though and as it will be slightly altered kit i decided to go for the next letter in greek alphabet - Rho.

Follows a line and avoid obstacles, Make sound with a piezo speaker
Using a
This is my entry for the DAGU "Beginners Robot Chassis Challenge". It is prelimary named Pacman, but the name maybe change in the future. Pacman was my first idea, … Read more

Western Canadian Robot Games = Great fun

Hello all,

The Western Canadian Robot Games in Calgary was a great success in Calgary for my new robot.  I will be updating this post with more videos and pics soon and also making a new robot entry for my sumo.  Enjoy the video I found on youtube.  I think Samm is in there too.

custom line follower problems[one IR led, is bright, the other two are dim]

Hi, i learned eagle basics, so as a first eagle project i made this line follower with sparkfun's QRD1114 IR detector thing.


the project is attached.


what could be wrong here?


from left to right the first QRD is dim, the middle one is bright, the last one is dimmer then the bright one, but brighter than the dim one :S



LineIronBot is my latest robot. I have hacked my dead iron and now it is functioning line follower robot! :D I was thinking of building a line follower for a few … Read more
Avoids obstacle follows line and detects traffic lights
Using a
The features of this robot are obstacle avoidance line following and detection of the traffic lights.It follows the white path on a black surface and detect the … Read more
Obstacle Avoider and Line Follower
Using a
Mini robot follows the black path on a white surface it also detects the obstacles on its path. I use pic16f628a microcontroller and sensors cny70, tsop1738 Read more

Line follower on changing contrast

I am making a line follower using an ATmega8

Now the problem is the testing of line follower, there is a black line over a white surface and then after a while, there is a white line over a black surface....

The robot will make a start on any of the corners...so it is  impossible to tell whether it is a white line or black line...and also in middle, the contrast will change...

I have to make the program in such a way that it will detect the change in contrast and continue its work

I thot this can be done in programming part..so posted here...

I haven't posted a Lego robot or a line follower, so I thought I'd do both together. Line followers have been done to death. I've blown the dust off my Lego RCX. … Read more

Line Follower using Atmega8

Hi all, I am new here and about to make a debut in robotics with a simple line follower robot.

I have chose AVR ATmega8 as my microcontroller because I found out that we can chose which pins we want as input and which ones as output. So this seems pretty cool for a microcontroller. Also i figured out that it is cheaply available here.