Vintage phone AI assistant

Ramazan Eren Arslan converted a Deutsche Bundespost FeTAp 791 rotary telephone into a voice assistant, with the build documented on Hackster.io. Lifting the handset and speaking routes the query to Google Gemini, which answers through the phone's original earpiece, with a Raspberry Pi 3B installed inside the housing in place of the original PCB and the hook switch wired to GPIO.