The PCB design for the Digital Interface Module is just about ready. It should be a versatile platform for experimenting with USB and WiFi and developing the necessary software. The DIM provides much of the necessary circuitry for both the ARDF Transmitter and ARDF Receiver, and is designed to fully support both projects.
You can view the OSH Park board at https://oshpark.com/profiles/DigitalConfections
The Open ARDF web site has also been updated with links to schematics, BOM, software and PCB: http://openardf.org/index.php/ardf-open-equipment-project/documents/