3 ms·
NFC is passive until powered by an external signal. It's very short range, but it does not require internal power. There could be a longer range version at some
by berbec 7y ago
NFC is passive until powered by an external signal. It's very short range, but it does not require internal power. There could be a longer range version at some point.
- RosanaAnaDana 7y agoMaybe thats what this is. I'm well outside of the world of signal transduction, but a cell antenna/ wifi/ bluetooth antenna might be able to..
- Xylakant 7y agoYes, but an NFC tag cannot initiate a connection on its own volition. And that’s very much a feature I like in WiFi: I can actively start downloading something. A WiFi card that only responds to an external ping is useless.
- m463 7y agoI think what berbec is saying is maybe you can locate an NFC device that has a depleted battery. That said, I don't know if apple NFC works that way. Apple can use NFC to read nearby NFC tags, and possibly become an NFC tag, but I don't know if it can respond in a static way without power.