hell yeah, I've made a whole useless product like that! In lab, we had OLED display powered by NFC too, and touchscreen e-ink tetris device, and spot welder lol. Nobody believed me it's possible, even engineers who worked with me, might be I was the first one to come up with this hack.
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@discuss.tchncs.de
Projects, pictures, industry discussions and news about electronic engineering & component-level electronic circuits.
Rules
1: Be nice.
2: Be on-topic (eg: Electronic, not electrical).
3: No commercial stuff, buying, selling or valuations.
4: No circuit design repair, tools or component use / sourcing questions. Those go in ASKElectronics.
5: No excessively promoting your own sites, social media, videos etc.
Ask questions in https://discuss.tchncs.de/c/askelectronics
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This is how tap to pay cards work IIRC. Secure storage chip, transceiver chip, NFC coil, boom
save