sriharsha2007
Published © Apache-2.0

Line Following Robot

Follows a black line.

BeginnerFull instructions provided14
Line Following Robot

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
IR Proximity Sensor
Digilent IR Proximity Sensor
×2
Dual H-Bridge motor drivers L298
SparkFun Dual H-Bridge motor drivers L298
×1
Geared DC Motor, 12 V
Geared DC Motor, 12 V
×2
Jumper wires (generic)
Jumper wires (generic)
×1
9V battery (generic)
9V battery (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Hot glue gun (generic)
Hot glue gun (generic)
Multitool, Screwdriver
Multitool, Screwdriver

Story

Read more

Schematics

circuit diagram

Code

Code

C/C++
  int vSpeed = 110;        // MAX 255
  int turn_speed = 230;    // MAX 255 
  int turn_delay = 10;
  
//L293 Connection   
  const int motorA1      = 8;  
  const int motorA2      = 10; 
  const int motorAspeed  = 9;
  const int motorB1      = 12; 
  const int motorB2      = 13; 
  const int motorBspeed  = 11;

//Sensor Connection
  const int left_sensor_pin =A0;
  const int right_sensor_pin =A1;

  
  
  int left_sensor_state;
  int right_sensor_state;

void setup() {
  pinMode(motorA1, OUTPUT);
  pinMode(motorA2, OUTPUT);
  pinMode(motorB1, OUTPUT);
  pinMode(motorB2, OUTPUT);

  Serial.begin(9600);

  delay(3000);
  
}

void loop() {
  

  


left_sensor_state = analogRead(left_sensor_pin);
right_sensor_state = analogRead(right_sensor_pin);

if(right_sensor_state > 500 && left_sensor_state < 500)
{
  Serial.println("turning right");

  digitalWrite (motorA1,LOW);
  digitalWrite(motorA2,HIGH);                       
  digitalWrite (motorB1,LOW);
  digitalWrite(motorB2,HIGH);

  analogWrite (motorAspeed, vSpeed);
  analogWrite (motorBspeed, turn_speed);
  
  }
if(right_sensor_state < 500 && left_sensor_state > 500)
{
  Serial.println("turning left");
  
  digitalWrite (motorA1,HIGH);
  digitalWrite(motorA2,LOW);                       
  digitalWrite (motorB1,HIGH);
  digitalWrite(motorB2,LOW);

  analogWrite (motorAspeed, turn_speed);
  analogWrite (motorBspeed, vSpeed);

  delay(turn_delay);
  }

if(right_sensor_state > 500 && left_sensor_state > 500)
{
  Serial.println("going forward");

  digitalWrite (motorA2,LOW);
  digitalWrite(motorA1,HIGH);                       
  digitalWrite (motorB2,HIGH);
  digitalWrite(motorB1,LOW);

  analogWrite (motorAspeed, vSpeed);
  analogWrite (motorBspeed, vSpeed);

  delay(turn_delay);
  
  }

if(right_sensor_state < 500 && left_sensor_state < 500)
{ 
  Serial.println("stop");
  
  analogWrite (motorAspeed, 0);
  analogWrite (motorBspeed, 0);
  
  }

 
}










 

Credits

sriharsha2007

sriharsha2007

3 projects • 0 followers

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