Automated Guitar Tuner

This project is an Arduino-based automated guitar tuner that uses a stepper motor to adjust the tuning of guitar strings by analyzing their frequencies. The tuner captures the sound of a guitar string, performs a Fast Fourier Transform (FFT) to find the dominant frequency, and then adjusts the tuning peg using a stepper motor to match the desired frequency.

Features

• Automated Tuning: Tunes all six strings of a standard guitar.
• Frequency Analysis: Uses the arduinoFFT library for accurate frequency detection.
• Stepper Motor Control: Utilizes the AccelStepper library for precise motor control.

Hardware Required

• Arduino Board: An Arduino Uno or compatible microcontroller.
• Stepper Motor: A 4-wire stepper motor.
• Stepper Motor Driver: A driver board for controlling the stepper motor.
• Microphone/Sensor: A microphone or piezoelectric sensor to capture the sound.
• Breadboard and Jumper Wires: For connecting the components.
• Resistors: As required for the microphone/sensor circuit.

Circuit Diagram

Include a circuit diagram image here if available.

Software Requirements

• Arduino IDE: Download Arduino IDE.
• arduinoFFT Library: Install via Arduino Library Manager.
• AccelStepper Library: Install via Arduino Library Manager.

Installation

1. Clone the Repository:

   git clone https://github.com/Milind-Ranjan/Automated-Guitar-Tuner.git
   cd Automated-Guitar-Tuner
   

2. Open the Project in Arduino IDE:
   • Open the guitar_tuner.ino file in the Arduino IDE.
3. Connect the Arduino:
   • Connect your Arduino board to your computer using a USB cable.
4. Upload the Code:
   • Select the correct board and port in the Arduino IDE.
   • Click the Upload button to upload the code to your Arduino.

How It Works

1. Start the Tuner:
   • Open the serial monitor in the Arduino IDE.
   • The tuner will prompt you to select a guitar string to tune by entering a number (0-5):
   • 0: 6th String (E2)
   • 1: 5th String (A2)
   • 2: 4th String (D3)
   • 3: 3rd String (G3)
   • 4: 2nd String (B3)
   • 5: 1st String (E4)
2. Recording Audio:
   • The tuner records audio for a few seconds to capture the frequency of the selected string.
   • The arduinoFFT library is used to perform a Fast Fourier Transform (FFT) on the recorded samples to find the dominant frequency.
3. Tuning the String:
   • The detected frequency is compared to the target frequency for the selected string.
   • The difference between the detected and target frequencies is calculated.
   • The stepper motor is then adjusted to correct the tuning by rotating the tuning peg.
4. Repeat for Other Strings:
   • Repeat the process for each string until the guitar is fully tuned.

Example Output

Sample output from the serial monitor:

Select a string to tune (0-5):

0: 6th String (E2) 1: 5th String (A2) 2: 4th String (D3) 3: 3rd String (G3) 4: 2nd String (B3) 5: 1st String (E4)

Selected String: 2 Recording audio for 1 second. Recording complete. Measured Frequency (Hz): 146.50 Target Frequency (Hz): 146.83 Adjustment Steps: 2

Contributing

Contributions are welcome! Feel free to submit a pull request or open an issue if you have suggestions for improvements or if you find any bugs.