An NFC energy-harvesting PCB business card with a microcontroller

· Adafruit Industries Blog · Aug. 31, 2026, 9:51 p.m.
Summary
Wilson Harper created a battery-free PCB business card that lights up 21 LEDs using energy harvested from NFC technology. This project, which utilizes KiCad for design and integrates an NXP NTAG I2C Plus with an ATtiny816 microcontroller, showcases innovative techniques in electronics and product design.
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