Software for Your Open Hardware

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.

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.

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.

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.

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.

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.

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.

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.

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.