• Eurorack 3340 VCO module with 4 waveforms (square, triangle, ramp, sine). Features hard sync, soft sync, linear frequency modulation, 1V/octave input, and external pulse width modulation control.
  • Eurorack 3340 VCO module with 4 waveforms (square, triangle, ramp, sine). Features hard sync, soft sync, linear frequency modulation, 1V/octave input, and external pulse width modulation control.
  • Eurorack 3340 VCO module with 4 waveforms (square, triangle, ramp, sine). Features hard sync, soft sync, linear frequency modulation, 1V/octave input, and external pulse width modulation control.
  • 3340 VCO Eurorack module design tip: Use low-tolerance capacitors (silver mica or polystyrene) for precise stability.
  • 3340 VCO / Eurorack / PCB + Front Panel
  • 3340 VCO / Eurorack / PCB + Front Panel
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3340 VCO / PCB and Front Panel

3340 VCO / PCB and Front Panel

€19,99 EUR
€19,99 EUR
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Low stock: 2 left

3340 VCO (Voltage Controlled Oscillator)

The 3340 VCO is a 10HP skiff-friendly (25mm depth) Eurorack PCB and Front Panel Kit. This CEM3340/AS3340-based analog oscillator is designed for intermediate builders and can be fully calibrated using only a chromatic tuner. This version of the kit includes the PCB and front panel only, allowing builders to source their own AS3340 IC and other necessary components.

Technical Specifications

  • Format: Eurorack
  • Core IC: CEM3340 / AS3340 (High-accuracy VCO)
  • Width: 10HP
  • Depth: 25mm (Skiff-friendly)
  • Skill Level: Intermediate / Expert (Focus on precision calibration)
  • Calibration Tools: Chromatic Tuner (Standard guitar tuner or phone app is sufficient). No multimeter or oscilloscope required.
  • Current Draw (+12V): 15mA
  • Current Draw (-12V): 15mA
  • PCB: Professional-grade FR4; high-contrast silk-screen
  • Panel: 1.6mm Black FR4; hand-applied orange and white graphics

Key Features

  • Eurorack PCB and front panel kit only
  • Supports Square, Triangle, Ramp, and Sine waveform outputs
  • Hard Sync and Soft Sync inputs
  • Linear Frequency Modulation and accurate 1V/octave tracking
  • External CV control for pulse width modulation (PWM) (0 to +5V)
  • 10HP Eurorack format

Modulation & Sound Design

The 3340 VCO offers a wide sonic range, from aggressive, harmonically rich tones to smooth and stable waveforms. With multiple sync options, linear FM, and precise pitch control, this Eurorack VCO design is well suited for complex modulation and expressive patching within modular synth systems.

DIY Build & Front Panel

This DIY Eurorack VCO PCB and front panel kit is intended for intermediate to experienced builders. The PCB is clearly labeled to assist with assembly and troubleshooting. The included front panel is made from durable PCB material and screen printed by hand, providing a distinctive and professional appearance for your finished module.

Please note: The AS3340/CEM3340 IC and other electronic components are not included in this kit.

(Note: Electronic components/ICs are not included.)

Skiff Friendly Module

Photo of a Eurorack module taken from the side to show the depth of the modules. Skiff Friendly.

Compatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.

Video Demo

Calibration

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Available documents