Entries tagged #nfc on Unique.https://unique.rzen.dev/en-ushttps://unique.rzen.dev/reviews/nfc-business-card/https://unique.rzen.dev/reviews/nfc-business-card/Wilson Harper's PCB business card harvests energy from the phone tapping it to animate 21 Charlieplexed LEDs — and the write-up shows every decision, including the one that breaks the datasheet on purpose.Mon, 31 Aug 2026 00:00:00 GMTmakingpcbnfcelectronicsdiyopen-source