4-Band Graphic Equaliser Variant 10 Kit with Arduino Due + LED
Build a Professional 4-Band Graphic Equaliser with Arduino Due & LED Spectrum Display
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Craft a studio-grade audio equaliser that processes sound in real time, splitting it into four bands — deep bass, vocal warmth, presence, and high-frequency clarity. Whether you're tuning music, building a voice assistant front-end, or preparing a DSP project for engineering submission, this kit gives you full control over every frequency.
What You'll Build
You'll assemble a standalone 4-band graphic equaliser with an OLED spectrum display, four potentiometer sliders for per-band gain, and an internal microphone or line-in input. The device processes audio via the Arduino Due's processor, applying precise FIR filters at 80 Hz, 500 Hz, 3 kHz, and 12 kHz, and outputs clean amplified audio through the PAM8403 speaker module.
What You'll Learn
- Implement finite impulse response (FIR) bandpass filters in C++ on a 32-bit ARM microcontroller
- Interface a high-resolution MCP4728 DAC for low-noise audio output
- Design a user interface with an OLED display and potentiometer gain controls
- Condition signals with the MAX9814 microphone amplifier and audio output amplification
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Due | x1 |
| MCP4728 DAC | x1 |
| PAM8403 Amp | x1 |
| MAX9814 Mic | x1 |
| 10kΩ Potentiometer | x4 |
| 0.96in OLED | x1 |
| 100nF Caps | x15 |
| PCB Prototype Board | x2 |
| Enclosure Box | x1 |
| 9V 1A PSU | x1 |
| Soldering Iron | x1 |
| Solder Wire | 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
This kit is designed for B.Tech ECE and EEE students tackling DSP projects, Smart India Hackathon participants building audio-based systems, and hobbyists from IIT, NIT, VIT, or BITS who want a practical, pre-verified setup for real-time signal processing. It's also ideal for CBSE Class 12 students with an interest in electronics beyond the curriculum.
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?
If you get stuck, scan the QR code to chat with our AI companion, trained on this exact kit. Our team is also available over WhatsApp for personalised help.
Can I use this equaliser with a guitar or external audio source?
Yes, the MAX9814 microphone module has a line-in option; you can connect an external audio source via the breakout pads.
Does this kit require a computer for programming?
The Arduino Due comes pre-flashed with the FIR equaliser firmware, so you can start building right away. You can modify the code later using the Arduino IDE.
What if I accidentally damage a component while soldering?
We offer individual component replacements at nominal cost. Email or WhatsApp us, and we'll ship the part within 24 hours.
Arduino Due applies FIR band filters at 80Hz 500Hz 3kHz 12kHz via MCP4728 DAC output. Potentiometer gain control.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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