What is it?

A VCO for Eurorack. This is a card set - you supply the parts.

• Digital Voltage Controlled Oscillator (VCO)
• Build of Pico VCO by HAGIWO
• Eurorack 3U tall, 6HP wide (30 mm)
• Control and CPU cards are 28mm wide to allow for card-to-card mechanical tolerances
• (3) Card set
• XIAO RP2040 CPU
• Three modes: Wavefold, FM and AM
• V/oct pitch, CV = 0-5V, 5 octaves
• PWM output with 2 pole low pass filter
• Each mode has eight built-in waveforms
• AC coupled output
• (3) Switches
• 3-position Octave Up/Down toggle
• 3-position Mode Up/Down toggle (Wavefold, FM and AM)
• Waveform Pushbutton switches between 8 waveforms for each of the three modes
• (2) Knobs
• Freq fine adjust (sub octave range)
• Mod adjust
• Standard EuroRack 16 pin power header
• Requires 5V from Eurorack power
• Programmed in Arduino IDE

Why did you make it?

It's a cool design by HAGIWO and the CPU is continuously available.

What makes it special?

It does a lot of modes - Wavefold, AM, FM, etc.

Price Break

There is a price break for qty 3 card sets. If you order 3 cards, they ship as a panel that needs to be snapped apart. The cards separate easily from each other since they are V-scored. It's just a bit easier to ship them as panels.

Our other Eurorack cards

• Eurorack Prototyping Card Set (ER-PROTO-02)
• Eurorack Prototyping Card Set, (ER-PROTO-01)
• ADSR Envelope Generator Eurorack PCB Set
• Eurorack 5 Channel Mixer (PCB Only)
• Eurorack Dual VCA card set
• Eurorack MIDI to CV Controller
• Eurorack Power Card (PCB Only)