If you are building applications using RFID or NFC
technology you may be interested in a new blank bracelet now available from the
Adafruit online store. The 13.56MHz RFID/NFC Bracelet is equipped with a
NTAG203 Chip and is priced at just $3.95. RFID chip specifications : 144 bytes
of user r/w memory area, divided in 36 pages (4 bytes each), 7 Byte unique
identifier burned into the chip and an operating frequency of 13.56 MHz.
The blank RFID can be used with almost any 13.56MHz
RFID/NFC reader, but make sure it can handle ISO/IEC 14443 Type A cards (the
standard NTAG uses) as there are a few other encoding standards (like FeLica),
says Adafruit.
These chips can be written to and store up to 144
bytes of data in writable EEPROM divided into 4 byte banks, and can handle over
10,000 re-writes. You can use our PN532 NFC/RFID breakout board or Adafruit
NFC/RFID Shield for Arduino to read and write data to the EEPROM inside the
tag. There is also a permanent 7-byte serial number ID burned into the chip
that you can use to identify one tag from another – the ID number cannot be
changed.
