# device — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link.

**3 device listed.**

## Micro Journal Rev.3: Nadia

A 48-key ortholinear mechanical keyboard designed as a distraction-free writing companion for phones and tablets, powered by RP2040 with QMK/Vial firmware and dual rotary encoders.

[Details](https://openhardware.directory/devices/micro-journal-rev3-nadia) | [Markdown](https://openhardware.directory/devices/micro-journal-rev3-nadia/md)

## Adafruit MACROPAD RP2040

RP2040-powered 3×4 mechanical macropad with 12 NeoPixels, a 128×64 OLED display, rotary encoder, speaker, and STEMMA QT — fully programmable via CircuitPython or Arduino.

[Details](https://openhardware.directory/devices/adafruit-macropad-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-macropad-rp2040/md)

## Adafruit KB2040

Arduino Pro Micro-compatible RP2040 keyboard controller with 8 MB flash, 20 GPIO, STEMMA QT, castellated USB pads, NeoPixel, and QMK/KMK/CircuitPython support for custom mechanical keyboards.

[Details](https://openhardware.directory/devices/adafruit-kb2040) | [Markdown](https://openhardware.directory/devices/adafruit-kb2040/md)