Published June 29, 2019 © GPL3+

Line Follower Using Arduino | Easy DIY Project

In this tutorial, we will be making a line follower using Arduino and L298N motor driver.

BeginnerFull instructions provided1,603

Line Follower Using Arduino | Easy DIY Project

Things used in this project

Hardware components

Arduino UNO

DC Motor, 12 V

SparkFun RedBot Sensor - Line Follower

SparkFun Dual H-Bridge motor drivers L298

Jumper wires (generic)

Solderless Breadboard Half Size

Software apps and online services

Arduino IDE

Story

Connect the wires to the motors. Then attach the motors to the chassis using Zip ties. Attach the wheels to it.

Now the body is complete.

Here we are using an L298N motor driver module which is a dual H-Bridge driver. It can drive 2 motors bi-directionally or 4 motors uni-directionally.

Connect the motors to the driver.

Connect the power source to the power pins of the driver.

The IR sensor module has an emitter and a receiver. The IR light is absorbed by black surfaces and reflected by white surfaces. This helps us to follow the black line.

Connect 3 jumpers to the IR sensors.

One for data and the rest two for power.

Connect the input pis of the motor driver to the digital pins of the Arduino. Assign them using the code. Do the same for the IR sensors.

Link to the code: https://github.com/sairushan/Line-follower

Upload the code and enjoy!

Code

Code

#define LS1 A3
#define LS2 A2 
#define RS1 A1
#define RS2 A0 
#define LM1 8     
#define LM2 9    
#define RM1 10      
#define RM2 11    




void setup()
{ 
  pinMode(LS1, INPUT);
  pinMode(LS2, INPUT);

  pinMode(RS1, INPUT);
  pinMode(RS2, INPUT);

  pinMode(LM1, OUTPUT);
  pinMode(LM2, OUTPUT);
  pinMode(RM1, OUTPUT);
  pinMode(RM2, OUTPUT);

     digitalWrite(LM1,0);
  digitalWrite(LM2,0);
  digitalWrite(RM1,0);
  digitalWrite(RM2,0);

delay(5000);
}





int left()
{
  if(digitalRead(LS1)||digitalRead(LS2))
  return(0);
  else
  return(1);
}
int right()
{
  if(digitalRead(RS1)||digitalRead(RS2))
  return(0);
  else
  return(1);
}
void loop()
{
if(left()&&right())
{
  digitalWrite(LM1,1);
  digitalWrite(LM2,0);
  digitalWrite(RM1,1);
  digitalWrite(RM2,0);
  
}
else if ((left()==0)&&(right()==1))
{
    digitalWrite(LM1,1);
  digitalWrite(LM2,0);
  digitalWrite(RM1,0);
  digitalWrite(RM2,0);
}
else if ((left()==1)&&(right()==0))
{
    digitalWrite(LM1,0);
  digitalWrite(LM2,0);
  digitalWrite(RM1,1);
  digitalWrite(RM2,0);
}
else
{
   digitalWrite(LM1,0);
  digitalWrite(LM2,0);
  digitalWrite(RM1,0);
  digitalWrite(RM2,0);
}

}

Credits

sairushan

0 projects • 7 followers

Line Follower Using Arduino | Easy DIY Project

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Code and Schematic :

Code

Code

Code

Credits

sairushan

Comments

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Line Follower Using Arduino | Easy DIY Project

Line Follower Using Arduino | Easy DIY Project

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Code and Schematic :

Code

Code

Code

Credits

sairushan

Comments

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