Software Defined Ultrasonic Transceiver - SDU-X

This is a complete design for a system to send and receiver data using ultrasonics. Besides being a useful system for sending data it is also intended as a platform for exploring concepts and firmware as used in software defined radio (SDR) but without the complexity of RF and FPGAs.
Included is the full design package for the electronics (schematic, PCB design files, parts lists, etc.) along with stl files for the parabolic tower. There is also a set of notes for more info on constructing the PCB and notes on the firmware.
See more in the article in EDN at: https://www.edn.com/exploring-software-defined-radio-without-the-annoying-rf-part-1/
and: https://www.edn.com/exploring-software-defined-radio-without-the-annoying-rf-part-2/

The PCB holder seen in the picture can be found at: https://www.thingiverse.com/thing:5691258