3 ms·
As far as I can tell, it seems to work the same way that passive RFID tags work. Pretty neat, I guess.
by akovaski 10y ago
As far as I can tell, it seems to work the same way that passive RFID tags work. Pretty neat, I guess.
- mrb 10y agoAlmost. Technically it's the same as active (not passive) RFID tags: both reflect RF signals, and both need a source of battery power is needed to open and close the antenna circuit. Passive RFIDs harvest power from the RF signals.