NFC Energy-Harvesting PCB Business Card with an MCU
Summary
This article documents a DIY NFC energy-harvesting PCB business card that powers a 21-LED Charlieplexed array from harvested NFC energy, controlled by an ATtiny816. It covers system architecture, antenna design, power management, PCB fabrication, and programming, offering practical insights into low-power embedded hardware and RF energy harvesting for compact electronics.