Theme 1 – Praise for the project and its open‑source documentation
- “Nice write up!” – thenthenthen
- “cool project, especially as a bachelor student of EE!” – danshagen
- “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.” – chews
- “Look at that subtle off‑white coloring, the tasteful thickness of it. Oh my God, it even has a schematic.” – badatnames
- “What an incredibly neat hack, congratulations.” – jacquesm
Theme 2 – Ideas for future features and practical applications
- “For future PCB business card ideas: it would be dope if it can play audios.” – yegle
- “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…” – entrepy123
- “I wonder if it can be applied to robo‑couriers and drone drop‑offs…” – adrianwaj
- “Another interesting use case would be using the card as part of a crypto escrow.” – adrianwaj
- “I wonder if it could run LoRa chip & MCU long enough to send. MeshCore message.” – m4rtink
Theme 3 – Technical constraints and power‑budget considerations
- “The card never actually transmits a message back to your phone. Instead, it changes how much energy it absorbs from the field, and your phone detects those power dips and converts them to binary data… This business card uses that last feature.” – adrianwaj
- “I think you are overcomplicating things. You have a power envelope, and you have to design your application around it. That's pretty much it… Your app lives and dies by its power budget.” – HawtAds
- “Yep, good point.” – adrianwaj (agreeing with the power‑envelope view)