Arduino Eurorack projects

DIY Eurorack projects with Arduino and common C++ libraries.

Modules

Each module has its own detailed README file.

• Clock divider: clock divider in 4HP.
• Forks: two Bernoulli gates, clone of Mutable Instruments Branches.
• In CV: virtual ensemble that plays Terry Riley's "In C" on CV/gate outputs.
• MIDI 4+1: polyphonic and monophonic MIDI to 4x CV/gate interface in 6HP.

Libraries and tools

• Button class: convenient reading methods, debouncing, combined single and long-press, internal pull-up usage.
• Knob class: analog value reading with low/high thresholds.
• LED class: handles minimum duration to ensure visibility, implements blinking, toggle, flash.
• MCP4728 class: extends Hideaki Tai's lib to include DACs calibration and optional LDAC. Sketches for setting I2C address (device ID) and guiding the calibration process are provided.
• MM74HC595M class: simple wrapper around shiftOut() to handle 74HC595 shift registers.

Note about the library folder

There's a symbolic link of the lib/ folder in every module folder. If the link doesn't work for you, you won't be able to compile: try to manually copy and paste the entire lib/ folder from the root next to the sketch you are trying to compile. Unfortunately the Arduino compiler does not allow including source files from parent folders.

License

Code: GPL 3.0, everything else: free domain.