From what I have read about RFID devices, the "chip" only contains a very long unique-in-the-universe "serial number". It does not contain your name or address or blood type or bank balance. The unique serial number must be used in conjunction with a database somewhere. The serial number points to records in the database where the data is stored, and can be easily updated. You typically cannot write data to an RFID chip, and the serial number is "hard wired" at the time of manufacture.
This student design project uses off-the-shelf radio modules (one transmitter, one receiver), manufactured by Radiotronix. The transmitter would have been tested and certified by the manufacturer, so that it is meeting appropriate frequency and RF power levels. 433MHz is commonly used for things like wireless garage door openers, so this project is a similar application. The statement that the students made about the 420-450MHz band wasn't really accurate.
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From what I have read about RFID devices, the "chip" only contains a very long unique-in-the-universe "serial number". It does not contain your name or address or blood type or bank balance. The unique serial number must be used in conjunction with a database somewhere. The serial number points to records in the database where the data is stored, and can be easily updated. You typically cannot write data to an RFID chip, and the serial number is "hard wired" at the time of manufacture.
This student design project uses off-the-shelf radio modules (one transmitter, one receiver), manufactured by Radiotronix. The transmitter would have been tested and certified by the manufacturer, so that it is meeting appropriate frequency and RF power levels. 433MHz is commonly used for things like wireless garage door openers, so this project is a similar application. The statement that the students made about the 420-450MHz band wasn't really accurate.