Let's Make Robots!

line following

Avoids running into things and follows lines
Using a
   Bunker is a small house bot that I am developing (altho, the developement has stalled somewhat as i moved on to other things. When some of my other projects … Read more

Line Follower

Hello, I am thinking to make my second beginner bot after my 'Start Here Bot'....

And this time, I choose it to be a line following bot...

For this, I would be using a pre-programmed Analog Line Following Board...

 

Please tell me that shall I use this chip gor my next robot

&

Please tell me that 'can' a line follower do some amazing things with some other little attachments?

 

Thanks for any help.!

Building a line following robot Need help with programming

 

#define INA_2   10   //This is the left forward control of the robot, I defined each pwm pin that is connected to the arduino

#define INB_2   11   //This is the left backward control of the motor, e.g set this high and INB_1 high and others low you will do a reverse

#define INA_1  5    //This is the right forward control of the motor

#define INB_1  6   //This is the right backward control of the motor

 

 

 

 

yuri suzuki: colour chaser

Hmmm....but why have such unpleasant sounds?  

As an elementary school art teacher I really like this.  Kids would be so excited to hear their color path.

I found this on designboom.

Happy New Year, y'all!

Emma

20/11/11 This is my new autonomous line following bot starting to take shape and a much more slicker design than my last bot attempt. It's made out of clear … Read more
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

Line following sensors questions

I am planning to place 2 line sensors on my robot project(ATmega8). I want to place LDR line sensors. Now i have a few questions.

What is the best distance to placethe sensors from each other? So that I have no bad readings and I still can follow the line 'smooth'.

What is the average breadth of a white line?

What is a good design of this type of sensor(LDR)? I would just place the LDR next to the led, is this okay?

And what is a good algorithme to use with a L293D with no pulse control(each motor is always on 100%)?

 

Thanks

Danny

Line Mazes and collision object avoidance
Using a
News (for those who don't want to read the article) -I have got one of the line sensors working. -I have got some basic line following going -I have given up on … Read more
AXE121 is an cheap and easy to use Line Follower Kit that can be easily connected to the Picaxe 28 pin Project board. You can buy it on the PICAXE on-line … Read more
This is my maze solving robot. It uses a Arduino RBBB from wulfden.org. It has 2 30:1 micro gear motors.  The robot has 5 reflectance sensors for sensing the line. … Read more
Line following, can be remote controlled via Bluettooth
Using a
YAABR is my first Arduino based robot. The name is an abbreviation for yet another Arduino based robot. It is a multipurpose platform for experimentation. With its … Read more
Line following, Driving around free with obstacle avoidance
Using a
This is a first attempt at building a robot. For now it is able to follow a line, and to drive around free with obstacle avoidance. In the near future I will … Read more

New line sensor

I had some problems with the 36 KHz detector when trying to read it from the picaxe, so I have switched to using 4 infrared photodiodes in a feedback setup with two LM358 dual opamp packages as shown in the following image (for one photodiode only):

linedetector.jpg

This gives an analog reading and I will use this for linear interpolation between the sensors to determine where the line is relative to the robot center.