Show HN: NFC Energy-Harvesting PCB Business Card with an MCU

Really cool. I'd love to be able to order cheap ones in packs of 5 or 10, with custom led colors/locations/sizes/brightness, fitting into a printed card...

For future PCB business card ideas: it would be dope if it can play audios.

Gemini says you can power a piezo buzzer (causing a small bump on a PCB) w/ NFC (just enough power to drive it) to play the modem dialup handshake audio.

Look at that subtle off-white coloring, the tasteful thickness of it. Oh my God, it even has a schematic

cool project, especially as a bachelor student of EE!

Really great project, thanks for sharing and what a well done write-up! Also kudos for including the PCB, BOM, and code on GH with a permissive license.

Nice write up!