Line Follower Robot

Line Follower Robot

Control your music with a wave of your hand. This project builds a gesture-controlled Bluetooth speaker in which an Arduino reads hand motion through the MPU-6050 gyroscope and accelerometer module and translates it into playback commands — tilt forward to raise the volume, rotate to change tracks, flat palm to pause — sent wirelessly through the HC-05 Bluetooth module to the paired phone or speaker. Gesture-recognition logic filters raw accelerometer and gyroscope readings so six deliberate hand movements are distinguished from accidental motion, delivering responsive, contact-free audio control. Gesture interfaces like this are a fast-growing HCI research area and make an impressive, demo-ready BTech ECE project combining sensors, embedded programming and wireless communication.

Components

Arduino Uno
MPU-6050 Gyroscope & Accelerometer
HC-05 Bluetooth Module
PAM8403 Audio Amplifier Module
4 Ohm 3W Speaker
Male to Female jumper Wires
On/Off Switch
9V Battery Breadboard
5mm Acrylic Sheet 20cm x 12cm

Components	Hexkart	Flipkart
Arduino	Buy Now	Buy Now
Bo motor (4)	Buy Now	Buy Now
1003	Buy Now	Buy Now
1001	Buy Now	Buy Now
1002	Buy Now	Buy Now
1003	Buy Now	Buy Now

Circuit Diagram

Arduino Code

#define enA 10//Enable1 L298 Pin enA
#define in1 9 //Motor1 L298 Pin in1
#define in2 8 //Motor1 L298 Pin in1
#define in3 7 //Motor2 L298 Pin in1
#define in4 6 //Motor2 L298 Pin in1
#define enB 5 //Enable2 L298 Pin enB
#define R_S A0 //ir sensor Right
#define L_S A1 //ir sensor Left
void setup(){ // put your setup code here, to run once
pinMode(R_S, INPUT); // declare if sensor as input
pinMode(L_S, INPUT); // declare ir sensor as input
pinMode(enA, OUTPUT); // declare as output for L298 Pin enA
pinMode(in1, OUTPUT); // declare as output for L298 Pin in1
pinMode(in2, OUTPUT); // declare as output for L298 Pin in2
pinMode(in3, OUTPUT); // declare as output for L298 Pin in3
pinMode(in4, OUTPUT); // declare as output for L298 Pin in4
pinMode(enB, OUTPUT); // declare as output for L298 Pin enB
analogWrite(enA, 150); // Write The Duty Cycle 0 to 255 Enable Pin A for Motor1 Speed
analogWrite(enB, 150); // Write The Duty Cycle 0 to 255 Enable Pin B for Motor2 Speed
delay(1000);
}
void loop(){
if((digitalRead(R_S) == 0)&&(digitalRead(L_S) == 0)){forword();} //if Right Sensor and Left Sensor are at White color then it will call forword function
if((digitalRead(R_S) == 1)&&(digitalRead(L_S) == 0)){turnRight();} //if Right Sensor is Black and Left Sensor is White then it will call turn Right function
if((digitalRead(R_S) == 0)&&(digitalRead(L_S) == 1)){turnLeft();} //if Right Sensor is White and Left Sensor is Black then it will call turn Left function
if((digitalRead(R_S) == 1)&&(digitalRead(L_S) == 1)){Stop();} //if Right Sensor and Left Sensor are at Black color then it will call Stop function
}
void forword(){ //forword
digitalWrite(in1, HIGH); //Right Motor forword Pin
digitalWrite(in2, LOW); //Right Motor backword Pin
digitalWrite(in3, LOW); //Left Motor backword Pin
digitalWrite(in4, HIGH); //Left Motor forword Pin
}
void turnRight(){ //turnRight
digitalWrite(in1, LOW); //Right Motor forword Pin
digitalWrite(in2, HIGH); //Right Motor backword Pin
digitalWrite(in3, LOW); //Left Motor backword Pin
digitalWrite(in4, HIGH); //Left Motor forword Pin
}
void turnLeft(){ //turnLeft
digitalWrite(in1, HIGH); //Right Motor forword Pin
digitalWrite(in2, LOW); //Right Motor backword Pin
digitalWrite(in3, HIGH); //Left Motor backword Pin
digitalWrite(in4, LOW); //Left Motor forword Pin
}
void Stop(){ //stop
digitalWrite(in1, LOW); //Right Motor forword Pin
digitalWrite(in2, LOW); //Right Motor backword Pin
digitalWrite(in3, LOW); //Left Motor backword Pin
digitalWrite(in4, LOW); //Left Motor forword Pin
}