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https://github.com/milind-ranjan/automated-guitar-tuner

Automated Guitar Tuner: An Arduino-based project that uses a stepper motor and FFT analysis to automatically tune a guitar. The system captures and analyzes the guitar string’s frequency, adjusts the tuning peg, and ensures each string is perfectly in tune.
https://github.com/milind-ranjan/automated-guitar-tuner

arduino arduino-uno audio-processing fastfouriertransform guitar-tuner microcontroller stepper-motor

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Automated Guitar Tuner: An Arduino-based project that uses a stepper motor and FFT analysis to automatically tune a guitar. The system captures and analyzes the guitar string’s frequency, adjusts the tuning peg, and ensures each string is perfectly in tune.

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README 

        
# 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](https://www.arduino.cc/en/software).

- **arduinoFFT Library**: Install via Arduino Library Manager.

- **AccelStepper Library**: Install via Arduino Library Manager.



## Installation



1. **Clone the Repository**:

   ```bash

   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.