SYNTH-VCO-01

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SYNTH-VCO-01 REV1 FRONT 3D.png

Features[edit]

  • Build of Pico VCO by HAGIWO
  • Digital Voltage Controlled Oscillator (VCO)
  • Three modes: Wavefold, FM and AM
  • PWM output with 2 pole low pass filter
  • Each mode has eight built-in waveforms
  • XIAO RP2040 CPU
  • (5) Pushbuttons
    • Octave Up/Down
    • Mode Up/Down (Wavefold, FM and AM)
    • Push Timbre switches between 8 waveforms
  • (2) Knobs
    • Freq fine adjust
    • Mod adjust
  • Standard EuroRack 16 pin header
    • Supports 12V in with on-board 5V regulator
    • 5V regulator can be not installed if 5V is available on EuroRack connection
  • Card is not a Eurorack card
    • Probably too deep, needs cabling
  • (4) 6-32 mounting holes

XIAO RP2040 Pins[edit]

  • Pin 1, GP26 = Vol/Oct, Analog In
  • Pin 2, GP27 = Freq Pot, Analog In
  • Pin 3, GP28 = Mod, Analog In
  • Pin 4, GP29 = Mod Pot, Analog In
  • Pin 5, GP6 = Timbre Pushbutton, select waveform type, Digital Input
  • Pin 6, GP7 = Gate (optional), Digital Input
  • Pin 8, GP1 = Octave Down, Digital Input
  • Pin 9, GP2 = Audio Output, PWM out
  • Pin 10, GP4 = Mode Down, Digital Input
  • Pin 11, GP3 = Mode Up, Digital Input
  • Pin 12 = +3.3V
  • Pin 13 = GND
  • Pin 14 = +5V

Software[edit]

Videos[edit]

Assembly Sheet[edit]