I built my own PiAware ADS-B receiver using a C.H.I.P computer.
Assembling the Rockmite ][ 20m ham radio CW (morse code) transceiver and receiving first transmissions. My first HF transceiver.
Weatherproof enclosure for rtl-sdr radio and RaspberryPi that is PoE (power over ethernet).
My first experience with the rtl-sdr dongle and upconverter to receive various radio signals.