Tag Archives: Arduino

Circuit Abbey Euro-Duino

euroduino_panelEurorack and Arduino. What common may be between a huge analogue rack and a brains for a toy robot? Perhaps it is openness of the both platforms and broad variety of existing solutions based on them. Nowadays it is not something outstanding to use a digital controller inside analog module, but Arduino also is respected for its simple and user-friendly development tools, allowing to create a device doing random tasks for minimum time and money. A couple of years ago Arduino chips had took their place in Eurorack modules. 4ms, Flame use AVR controllers in their products and Soundmachines specifically used Arduino to develop their Robotto and had published an SDK for it.

And now appeared modules that are intended to be programmed by owners. The first one was utility-module Expert Sleepers Disting ($175), based on PIC32MX uC, then Circuit Abbey Euro-Duino ($145), based on Arduino as it comes from the name. The price for the DIY kit of this module is just $95 and it has lots of fun within! So, let’s take a closer look at the module.
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Squarewave VCDO

This simple sketch turns Euroduino into square wave VCO. To build this project you need the NewTone library.


  • POT1: Coarse tune within 1 octave
  • POT2: CV2 modulation depth
  • SW1: Octave switch (0, +1, +2)
  • SW2: Range switch (0, +3, +6) (same as octave, but wider)
  • CV IN1: Exponential modulation, 1v/oct.
  • CV IN2: Exponential modulation, adjustable with pot 2
  • DIG OUT2: Audio out (With DC offset)