Guitar Tuner Kit with Arduino - Learn FFT for Accurate Tuning
Guitar Tuner Kit with Arduino Uno - Tune with FFT Precision and Real Cents Feedback
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn your Arduino into a lab-grade chromatic tuner that listens to each string's vibration, runs a Fast Fourier Transform, and instantly displays the nearest musical note along with precise cents deviation. Whether you're restringing an acoustic guitar or calibrating an electric, this kit gives you real-time visual feedback on a backlit LCD, making tuning fast, accurate, and deeply satisfying.
What You'll Build
You'll assemble a standalone guitar tuner that picks up sound with the MAX4466 microphone, amplifies the signal, and processes it through an FFT algorithm to extract the fundamental frequency. The software maps that frequency to standard musical notes (E2, A2, D3, G3, B3, E4) and shows on the LCD how many cents sharp or flat the string is. The result is a portable, battery-powered tool that fits in your guitar case and outperforms many phone apps in noisy rooms.
What You'll Learn
- Sampling analog audio with Arduino's ADC and pre-amplifying with MAX4466 for clean FFT input
- Implementing a Fast Fourier Transform library to decompose a signal into frequency bins
- Converting peak frequencies to musical note names using standard pitch tables and cents math
- Interfacing a 16�2 LCD via I2C backpack for crisp, real-time note and deviation readouts
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| MAX4466 Microphone Amplifier | x1 |
| 16x2 Character LCD | x1 |
| I2C Backpack Module | x1 |
| 10k? Resistors | x5 |
| 100nF Ceramic Capacitors | x10 |
| 400-Point Breadboard | x1 |
| Male-to-Male Jumper Wires | x20 |
| 9V Battery Snap Connector | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for CBSE Class 11-12 students building physics or computer science projects, B.Tech ECE/EEE undergrads exploring digital signal processing, and participants in the Smart India Hackathon who need a rapid audio prototyping toolkit. Equally at home in ATL Tinkering Labs, IIT/NIT/VIT/BITS hobby clubs, and anywhere makers want to connect music with microcontrollers.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to chat with the AI companion that knows every connection and line of code for this tuner. If you need a human touch, message us on WhatsApp for same-day guidance.
Can I use this tuner for other instruments like violin or ukulele?
Absolutely. The FFT-based detection works for any string instrument. Just pluck a string, and the tuner will display the nearest note and cents offset regardless of standard tuning sets.
Do I need to solder anything?
No soldering required. All connections are made on the included breadboard with jumper wires; the I2C backpack attaches directly to the LCD without solder.
How accurate is the frequency detection?
With a clean signal and proper calibration, the FFT algorithm can resolve frequencies to within �1 cent, which is more than enough for precise instrument tuning in any environment.
MAX4466 mic samples string vibration, FFT finds fundamental frequency and LCD shows nearest note and cents deviation.
What's in this kit
- Arduino Uno R3
- MAX4466 Mic Amp
- 16x2 LCD
- I2C Backpack
- 10k? Resistors x5
- 100nF Caps x10
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items