Dr. Umesh Dutta

•

Anmol Bose

•

Texas Instruments University Program

•

Energia

Published April 4, 2019 © GPL3+

Line Following Robot

This robot follows a dedicated path and can prove to be extremely useful in warehouse management, hotel industry and medical domain

BeginnerFull instructions provided24 hours1,199

Things used in this project

Hardware components

Texas Instruments MSP-EXP430G2 MSP430 LaunchPad

IR sensor module

Texas Instruments Dual H-Bridge motor drivers L293D

DC motor (generic)

Software apps and online services

Texas Instruments Energia

Story

We were curious to understand how robots have intelligence. The answer was there in our mind that its through sensors but we haven't designed anything in the filed of robotics. During Makeathon event held in our campus we got this challenge from our professor and it was time based ie. 24 hours only. Guess what we didn't have much knowledge about the field but still we were able to achieve the target. Lets understand how we have done it.

Working of LFR:

Line follower robot designed here follows a black line on white background. It consists of two IR sensors which feeds the signal to MSP430G2 launchpad module. Launchpad module is programmed using Energia IDE and it drives the DC motors through motor driver IC L293D.

When both left and right sensor senses white then robot move forward.

If Left sensor comes on back line then robot turns left side.

If right sensor sense black line then robot turn right side until both sensor comes on white surface. When white surface comes robot starts moving forward again.

If both sensor comes on black line, robot stops.

Applications:

Applications of such autonomous vehicles range from simple tasks like robots employed in industries to carry goods through factories, office buildings and other work spaces to dangerous or difficult to reach areas like bomb sniffing, finding humans in wreckage, etc.

Search and Rescue operations.

Navigation problems.

Medical attention.

The working video can be found at:

https://www.facebook.com/MRIIRSUniversityFaridabad/videos/822530944776175/

The youTube video can be found below:

LFR code

void setup() {
  pinMode(P1_2,OUTPUT);// left motor clockwiseput your setup code here, to run once:
pinMode(P1_3,OUTPUT);// left motor
pinMode(P2_4,OUTPUT);//right motor clockwise
pinMode(P2_5,OUTPUT);//right
pinMode(P1_4,INPUT);//LEFT SENSOR
pinMode(P1_5,INPUT);//RIGHT SENSOR
}


void loop() {
  // put your main code here, to run repeatedly: 
 if ((digitalRead(P1_4)==HIGH)&&(digitalRead(P1_5)==HIGH))
  {
  digitalWrite(P1_2,HIGH);//FORWARD
digitalWrite(P1_3,LOW);
 digitalWrite(P2_4,HIGH); 
  digitalWrite(P2_5,LOW);
  }
  if ((digitalRead(P1_4)==LOW)&&(digitalRead(P1_5)==LOW))
  {
     digitalWrite(P1_2,HIGH);//STOP
digitalWrite(P1_3,LOW);
 digitalWrite(P2_4,LOW); 
  digitalWrite(P2_5,LOW); 
  }
   if ((digitalRead(P1_4)==HIGH)&&(digitalRead(P1_5)==LOW))
  {
     digitalWrite(P1_2,HIGH);//FORWARD
digitalWrite(P1_3,LOW);
 digitalWrite(P2_4,LOW); 
  digitalWrite(P2_5,HIGH); 
  }
   if ((digitalRead(P1_4)==LOW)&&(digitalRead(P1_5)==HIGH))
  {
     digitalWrite(P1_2,LOW);//FORWARD
digitalWrite(P1_3,HIGH);
 digitalWrite(P2_4,HIGH); 
  digitalWrite(P2_5,LOW); 
  }
}

Line Following Robot