How to make a line follower?
What a big question
coming in the mind of almost all UG students....
I have a solution
for that …..
what basically a
line follower has to do is to detect the line with the sensors
The sensors are
mainly the optical transmitter and receivers.
They throw light at
the surface and receive to detect if the light is fully reflected or
absorbed by the surface
absorption means
the surface below that sensor is black and reflection means that the
surface below that surface is white.
Now let us go to
the sensor side...
I have experimenter
many sensors related to optical transmission and reception I would
like to mention them in brief here
1)first I tried
directly with the IR LED and Photo diode but the configuration didn't
work perfectly according to my needs.
2)second one is
just the enhanced version of first one I included an indicator LED to
show whether the sensor is working or not and used a simple
transistor as a switch configuration …
Here you can put a
potentiometer in the base so that you can vary the sensitivity of
the sensor , but we got perfect result with the help of steady
values also so you can also try “Trial and error method”.
Many people
recommend the sensor based on Photo Resistor(LDR) but I would say
“don't go for it”..
and now one video
speaks more than one post.
Now you have all
you need to start programming a micro controller to make decision and
a good algorithm to keep following the line.....
you can go for programming and logic of line follower in my another post
enjoy
“sensing” :)
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