# project — Open Hardware Directory

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**9 project listed.**

## ADX-MINI Open-Source Firmware for Digital HF QRP Transceiver

Open-source Arduino firmware for the ADX-MINI family of digital mode QRP transceivers (MINI, MI2, MI3), supporting FT8, FT4, JS8Call, and WSPR on HF bands from 160m to 6m with CAT control and OLED display.

[Details](https://openhardware.directory/projects/adx-mini-open-source-firmware-for-digital-hf-qrp-transceiver) | [Markdown](https://openhardware.directory/projects/adx-mini-open-source-firmware-for-digital-hf-qrp-transceiver/md)

## WB2CBA ADX — Arduino Digital Modes HF Transceiver

The original open-source Arduino digital transceiver design by WB2CBA supporting FT8, FT4, JS8Call, and WSPR on 80m-10m bands. The foundation project that inspired the ADX-MINI, ADX-S, ADX-POCKET, and numerous community builds.

[Details](https://openhardware.directory/projects/wb2cba-adx-arduino-digital-modes-hf-transceiver) | [Markdown](https://openhardware.directory/projects/wb2cba-adx-arduino-digital-modes-hf-transceiver/md)

## Cowtown ADX Buildathon Project — Construction Manual and 8-Band Firmware

Community-driven ADX build project by VK2ARH with comprehensive construction manual, 8-band firmware (including 160m), LPF tuning guides, and buildathon resources used by amateur radio clubs worldwide.

[Details](https://openhardware.directory/projects/cowtown-adx-buildathon-project-construction-manual-and-8-band-firmware) | [Markdown](https://openhardware.directory/projects/cowtown-adx-buildathon-project-construction-manual-and-8-band-firmware/md)

## REAST ADX QRP Digital Transceiver Club Build

Community bulk-buy and buildathon of 30 ADX QRP transceiver kits organized by the Radio and Electronics Association of Southern Tasmania (REAST) with custom REAST-branded PCBs and guided build sessions.

[Details](https://openhardware.directory/projects/reast-adx-qrp-digital-transceiver-club-build) | [Markdown](https://openhardware.directory/projects/reast-adx-qrp-digital-transceiver-club-build/md)

## ADX-S Superhet QRP Transceiver Kit by CRKits

Improved ADX variant by Adam BD6CR featuring a superheterodyne receiver with 455 kHz IF and ceramic filter for reduced broadcast interference, available as a 4-band or 7-band kit supporting FT8, FT4, JS8Call, and WSPR.

[Details](https://openhardware.directory/projects/adx-s-superhet-qrp-transceiver-kit-by-crkits) | [Markdown](https://openhardware.directory/projects/adx-s-superhet-qrp-transceiver-kit-by-crkits/md)

## FT8 QRP Operating Guide with CRKits ADX-S Radio

Practical blog tutorial by Stephen Smith covering ADX-S kit assembly, WSJT-X configuration for FT8 digital mode, antenna tips, and real-world QRP contacts across Western Canada and the US Pacific.

[Details](https://openhardware.directory/projects/ft8-qrp-operating-guide-with-crkits-adx-s-radio) | [Markdown](https://openhardware.directory/projects/ft8-qrp-operating-guide-with-crkits-adx-s-radio/md)

## OZ1BXM ADX-S Build Guide — 7-Band Arduino Digimode Transceiver

Detailed build blog by Lars Petersen OZ1BXM documenting the assembly of a 7-band CRKits ADX-S transceiver kit, with practical tips on LPF module assembly, inductor placement, and operating with WSJT-X or FT8CN on Android.

[Details](https://openhardware.directory/projects/oz1bxm-adx-s-build-guide-7-band-arduino-digimode-transceiver) | [Markdown](https://openhardware.directory/projects/oz1bxm-adx-s-build-guide-7-band-arduino-digimode-transceiver/md)

## ADXI — ADX Improved USB-C Digital Modes Transceiver

Modernized fork of the ADX transceiver by VK2DIY featuring single USB-C interface, KiCad design files, integrated SWR/power metering, SMT components, PlatformIO firmware, and expanded band support from 2200m to 70cm.

[Details](https://openhardware.directory/projects/adxi-adx-improved-usb-c-digital-modes-transceiver) | [Markdown](https://openhardware.directory/projects/adxi-adx-improved-usb-c-digital-modes-transceiver/md)

## ADX-POCKET — Shirt-Pocket Digital Modes HF Transceiver with CAT Control

Ultra-compact dual-board ADX variant by WB2CBA integrating USB hub, sound card, serial CAT control, and ATmega328P on a single controller board. Operates at 700mW from USB or up to 5W with external 12V power.

[Details](https://openhardware.directory/projects/adx-pocket-shirt-pocket-digital-modes-hf-transceiver-with-cat-control) | [Markdown](https://openhardware.directory/projects/adx-pocket-shirt-pocket-digital-modes-hf-transceiver-with-cat-control/md)