Build a Professional 4-Band Graphic Equaliser with Arduino Due & OLED

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Transform raw audio into a sculpted soundscape with a true FIR-based 4-band graphic equaliser you build yourself. This kit puts you inside a 32‑bit ARM Cortex‑M3 audio processor, using the Arduino Due to apply precise band-pass filters at 80 Hz, 500 Hz, 3 kHz, and 12 kHz. Four potentiometers become your tactile faders, while an OLED screen visualises the live spectrum and gain levels. Ideal for engineering lab demos, hackathon prototypes, or mastering the art of embedded digital signal processing.

What You'll Build

A standalone graphic equaliser that captures sound through a MEMS microphone, runs custom FIR filter code on the Arduino Due, and drives a 3 W speaker via a PAM8403 amplifier. The MCP4728 quad DAC converts each filtered band to an analog mix, whose gain you tweak in real time using the four 10kΩ potentiometers. A bright 0.96‑inch OLED displays per‑band levels, and everything fits neatly inside the included enclosure, ready for your desk or lab bench.

What You'll Learn

• Real‑time FIR filter implementation on the Arduino Due’s SAM3X8E ARM core
• I²C DAC communication using the MCP4728 to generate four independent analog outputs
• Complete audio signal chain design: mic preamp, digital filtering, DAC reconstruction, power amplification
• Embedded UI development with an OLED display and analog rotary controls for live parameter adjustment

Kit Contents

Arduino Due applies FIR band filters at 80Hz 500Hz 3kHz 12kHz via MCP4728 DAC output. Potentiometer gain control.

What's in this kit

• Arduino Due
• MCP4728 DAC
• PAM8403 Amp
• MAX9814 Mic
• 10kΩ Potentiometer x4
• 0.96in OLED
• 100nF Caps x15
• PCB Prototype Board x2
• Enclosure Box
• 9V 1A PSU
• Soldering Iron
• Solder Wire

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.