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DESCRIPTION
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This is a blank MiFare Classic tag embedded in a phone charm. These tags are like
those often used for train/bus passes but also found in other systems where a
proximity card is desired. The tag contains a NXP S50 chip and an antenna, and is
passively powered by the reader/writer when placed a couple inches away. Since
this tag has a small antenna, it has to be closer to the antenna than, say, a large
credit-card sized tag.
These can be read by almost any 13.56MHz RFID/NFC reader but make sure it can
handle MiFare cards as there are a few other encoding standards (like FeLica) They
are tested and work great with both our PN532 NFC/RFID breakout board and
Adafruit NFC/RFID Shield for Arduino!
These chips can be written to & store up to 1 KB of data in writable EEPROM divided
into banks, and can handle over 100,000 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 4-byte ID
burned into the chip that you can use to identify one tag from another - the ID
number cannot be changed.
These use the S50 chipset, which used to be the 'classic' NFC chipset. In ~2014, the
NFC forum decided not to support this chipset anymore, so newer phones do not
support the MiFare classic. This only matters if you're trying to use this tag with a
phone/tablet.
http://www.adafruit.com/products/884
7/23/2015
京公网安备 11010802033920号
EEWORLD
