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What is this "predecessor to RFID technology" business scattered all over the place in this article? RFIDs have a set, small amount of data that can be read of
by Semiapies 16y ago
What is this "predecessor to RFID technology" business scattered all over the place in this article? RFIDs have a set, small amount of data that can be read off of them, while this is a remotely-powered audio transmitter.
- seiji 16y agoThey aren't talking about data, they are talking about power transmission: http://en.wikipedia.org/wiki/Wireless_energy_transfer#Electrodynamic_induction_method http://en.wikipedia.org/wiki/Wireless_energy_transfer#Electr...
- Semiapies 16y agoFair enough - thanks!
- adolph 16y agoI think the person who titled the link is alluding to passive RFID tags, which have no power source and require an external electromagnetic field to initiate a signal transmission. http://en.wikipedia.org/wiki/Radio-frequency_identification http://en.wikipedia.org/wiki/Radio-frequency_identification
- Semiapies 16y agoFair enough - thanks!
- juiceandjuice 16y agoDynamic vs. static information, in a sense, is the only difference between a passive RFID and this device. In a sense, this could easily be made static/analog if you used some resonant filters. Take for example, a filter that operates at 1khz and 3khz. You radiate this device and get 1khz and 3khz tones back. Now take another one resonant filter at 7khz, and you get 1, 3, and 7, or 1, 3, 5, or 1,5,11, etc... You know have a unique passive, static identification technology. And this could have been done in 1945.
- Semiapies 16y agoFair enough - thanks! And a great point.
- deleted 16y ago[deleted]