Project Work

 Project Work

Voice control Robot:- 

  

 Components Needed:

• Arduino Uno (or Nano)

• L298N Motor Driver

• 2 DC Motors + Wheels

• Robot chassis

• HC-05 Bluetooth module

• Jumper wires

• Battery (7–12V)

• Android phone

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🧠 How It Works

1. You speak into your phone.

2. A voice control app converts speech → text.

3. The app sends command via Bluetooth.

4. Arduino receives command.

5. Motors move accordingly.

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🔌 Wiring Overview

1️⃣ Bluetooth (HC-05)

• VCC → 5V

• GND → GND

• TX → Arduino RX

• RX → Arduino TX (use voltage divider)

2️⃣ Motor Driver (L298N)

• IN1 → Arduino pin 8

• IN2 → Arduino pin 9

• IN3 → Arduino pin 10

• IN4 → Arduino pin 11

• Motors connected to OUT1, OUT2

• Battery to 12V input

Coding :-  

char command;

void setup() {
  Serial.begin(9600);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}
void loop() {
  if (Serial.available()) {
    command = Serial.read();
    if (command == 'F') {      // Forward
      digitalWrite(8, HIGH);
      digitalWrite(9, LOW);
      digitalWrite(10, HIGH);
      digitalWrite(11, LOW);
    }
    else if (command == 'B') { // Backward
      digitalWrite(8, LOW);
      digitalWrite(9, HIGH);
      digitalWrite(10, LOW);
      digitalWrite(11, HIGH);
    }
    else if (command == 'L') { // Left
      digitalWrite(8, LOW);
      digitalWrite(9, HIGH);
      digitalWrite(10, HIGH);
      digitalWrite(11, LOW);
    }
    else if (command == 'R') { // Right
      digitalWrite(8, HIGH);
      digitalWrite(9, LOW);
      digitalWrite(10, LOW);
      digitalWrite(11, HIGH);
    }
    else if (command == 'S') { // Stop
      digitalWrite(8, LOW);
      digitalWrite(9, LOW);
      digitalWrite(10, LOW);
      digitalWrite(11, LOW);
    }
  }
}

Simple Talking Robot

Components:

• Arduino (Uno/Nano)

• DFPlayer Mini (MP3 module)

• Micro SD card

• Speaker (3W)

• Push button (optional)

• Battery

 How It Works

• You store MP3 voice files on SD card.

• Arduino tells DFPlayer which file to play.

• Robot speaks through speaker.

Example Audio Files

On SD card:

• 0001.mp3 → “Hello, I am your robot.”

• 0002.mp3 → “How are you?”

• 0003.mp3 → “Nice to meet you.”

#include "SoftwareSerial.h"

#include "DFRobotDFPlayerMini.h"

SoftwareSerial mySerial(10, 11);

DFRobotDFPlayerMini myDFPlayer;

void setup() {

  mySerial.begin(9600);

  Serial.begin(9600);

  if (!myDFPlayer.begin(mySerial)) {

    while(true);

  }

  myDFPlayer.volume(20);  // Set volume (0-30)

  myDFPlayer.play(1);     // Play 0001.mp3

}

void loop() {

}