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A PCB business card with a batteryless LED, powered by the phone that taps it
I made a circuit-board business card that opens my website and lights an LED with power harvested from the phone tapping it.
- Points
- 105
- HN comments
- 32
- Submissions
- 1
- Cited by
- 0 commenters
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Sep 1, 2026 | A PCB business card with a batteryless LED, powered by the phone that taps it by thekevintang | 105 | 32 |
