NFC Energy-Harvesting PCB Business Card with an MCU
Like most business cards, mine doesn’t have a battery. When it’s tapped against a phone, though, 21 LEDs start an animation, powered just by NFC.
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- Hacker News
- wilsonharper.net
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Like most business cards, mine doesn’t have a battery. When it’s tapped against a phone, though, 21 LEDs start an animation, powered just by NFC.
Source: wilsonharper.net (64 points, 6 comments) Hacker News discussion
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