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16nx is a bank of faders for controlling electronic musical instruments. It emits MIDI, control voltage (CV), and I2C data. It is open-source and ready for you to make, modify, or hack.

It is currently at hardware revision C. You can find the latest hardware release at

firmware version 2.1.0. You can download latest versions from the releases page, where you'll find firmware releases, as well as appropriate zipfiles.

The menu on the right --> has links to the user guide, BOM, and more.

16nx Details

• 16 60mm faders
• USB-C connector
• RP2040 MCU
• sixteen CCs over USB-midi
• sixteen CCs over minijack midi (with switch to swap between standards)
• sixteen 0-5V CV output jacks, one per channel.
• I2C: monome-style I2C protocol over TRS (tip is SDA, ring is SCL), works with Monome Teletype; also, I2C MASTER mode, works with monome Ansible, ER-301, TXo, etc (may require firmware patching or modification to connected device).

Power from 5V USB-C into left-hand side, or from your computer.

Toggle switch allows you to swap between 'Type A' (ring is current source) and 'Type B' (tip is current source) minijack MIDI standards; board is labelled such.

Firmware

Firmware is now in its own repository, to decouple it, and its releases, from board hardware. You can download a compiled UF2 binary ready to drag across to your device from the firmware releases page

BOM

Largely in the BOM CSV file. Most mechanical parts - faders, switches, TRS jacks - you can get from eg Mouser; Thonkiconn jacks are, of course, from Thonk.

Credits

Based on 16nx by original work by Brian Crabtree, Sean Hellfritsch, and Brendon Cassidy.

Licensing

Panels and electronic schematics/layouts/gerber files are licensed under Creative Commons Attribution Share-Alike 4.0.