Comment Far-fetched? (Score 0) 104
First, in the interests of full disclosure, I do consider this a likely scam.
That said, I don't understand why so many people consider it physically impossible - Passive RFID works in very much the same way as what this Kickstarter describes. An RF pulse gives it just enough juice to do a miniscule amount of processing (looking up a stored number), then broadcast it back out to the world. Yes, capturing background RF would take some doing, but I don't know that I'd call it all that far outside the realm of plausibility.
For comparison, an RFID reader has the same FCC-imposed limits as WiFi, an EIRP of 4W (or put another way, a 1W transmitter with a typical 6dBi antenna).
Suspicious in the absence of a working prototype? Absolutely! Impossible? Not even close.
That said, I don't understand why so many people consider it physically impossible - Passive RFID works in very much the same way as what this Kickstarter describes. An RF pulse gives it just enough juice to do a miniscule amount of processing (looking up a stored number), then broadcast it back out to the world. Yes, capturing background RF would take some doing, but I don't know that I'd call it all that far outside the realm of plausibility.
For comparison, an RFID reader has the same FCC-imposed limits as WiFi, an EIRP of 4W (or put another way, a 1W transmitter with a typical 6dBi antenna).
Suspicious in the absence of a working prototype? Absolutely! Impossible? Not even close.