Addatone

Maker	Mountjoy Modular
Type	Two channel additive oscillator on a Lattice FPGA with an STM32 front end
Mounting	SMD
Width	12 HP
License	Proprietary (No hardware licence published)
Difficulty	🌋 Fine-pitch SMD

Odd and even harmonic channels with pot and CV control over harmonic count, spread and warp. The FPGA does the harmonic generation and the STM32 handles ADC scanning and holds the bitstream.

Documentation

• Schematic
• Fabrication files (PCBA-ready)

Links

• Source / files on GitHub
• Maker page

More from Mountjoy Modular

Ampelope Four channel envelope generator and quad VCA with a clockable tremolo Ball Bluetooth LE gyroscope remote with a Eurorack base module that outputs three CVs Comb Comb filter oscillator built on an STM32H723 DisPhaze Two channel phase distortion oscillator modelled on the Casio CZ synths Hypersoniq Four voice polyphonic high pass filter Kishoof Dual channel wavetable oscillator with 64MB USB accessible storage and a round LCD MidiMonger USB and serial MIDI interface with 8 gate and 4 CV outputs Oscar Three channel oscilloscope, tuner, spectrum analyser and MIDI event viewer

More oscillator modules

Braids Mutable Instruments Plaits Mutable Instruments Edges Mutable Instruments CHORD VCO HAGIWO 3340 VCO diysynth Tom Yum Voxmachina 2OPFM Super Synthesis Castor & Pollux Winterbloom

This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

← Back to all builds Resources Suggest a correction or a missing module