Build a Studio-Grade Eurorack VCO Module with Arduino Nano

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

Harness the Arduino Nano’s hardware timers to generate rock-solid square and triangle waves that track 1V/octave control voltage with instrument-level precision. This kit bridges digital stability with analog Eurorack signal paths, giving you a drift-free oscillator that sits happily in any modular rig—from dark ambient to techno leads. Whether you’re designing basslines, percussion cores, or clock sources, you’ll have a reliable voice at the centre of your patch.

What You'll Build

You’ll assemble a 4HP Eurorack module that outputs both square and triangle waves, with pitch accurately following the 1V/oct standard across multiple octaves. The finished module slots into any standard Eurorack case using the included 12V PSU, and interfaces seamlessly with filters, VCAs, and envelope generators. The front panel provides four 3.5mm jacks for CV input, audio out, and utility patching.

What You'll Learn

• Program an Arduino Nano to trigger precise timer interrupts for frequency-stable waveform generation
• Interface a 12‑bit MCP4725 DAC to convert digital pitch values into smooth analog control voltages
• Design and calibrate a TL074 op‑amp scaling circuit to match the 1V/octave standard
• Solder and assemble a complete Eurorack module, including panel wiring, power distribution, and signal routing

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit suits experienced DIY synthesizer builders and electronics engineers who already understand modular signal flow and want to go deeper into hybrid analog‑digital design. It’s especially relevant for B.Tech ECE/EEE students exploring embedded audio, Smart India Hackathon teams prototyping music technology solutions, and any hobbyist looking to add a custom, programmable VCO to their Eurorack system. If you’ve already soldered a few modules and are comfortable tweaking Arduino sketches, this project will stretch your skills in all the right ways.

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.

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.