MiFare Classic (13.56MHz RFID/NFC) Leather Keychain Fob - 1KB

by Adafruit

This is a blank MiFare Classic keychain fob - often used for electronic locks or customer identification but also found in other systems where a small and easy to carry tag 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.

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
  • can store up to 1 KB of data in writable EEPROM divided into banks
  • 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.

S50 chip specification:

  • 1 KiloByte (8 KiloBit) non-volatile EEPROM storage
  • Built in encryption engine with 48-bit key
  • 4 Byte unique identifier burned into the chip
  • 13.56 MHz frequency

Tag specification:

  • 38.39mm / 1.51" x 38.39mm / 1.51" x 5.04mm / 0.2"
  • 8.68g
  • Works about 2" away from reader

NXP S50 datasheet

2 customer reviews

3 years ago
An amazing little piece of kit for doing all sorts of things, not to mention MakeCode Arcade. This is a perfect device for using when teaching kids (or anybody really) about coding. You don't really need a device for MakeCode Arcade but having one has really kept my son enthused about coding, knowing that he can put his game on it and show it to family and friends, away from his PC. The only gripe I have is that I needed to hunt down a battery and a speaker because it doesn't come with those things. There is a kit available that includes a case, battery, buttons and speaker, but this is not it. You may have to google for the full kit elsewhere.
by Daniel about Adafruit PyGamer for MakeCode Arcade, CircuitPython or Arduino via REVIEWS.io
5 years ago
Very complete (if you add a very small LiPo and a speaker) gaming platform that you can program via Microsoft MakeCode Arcade (web interface), CircuitPython and in C with Arduino using Arcadia library. May be extended with Feather Wings, Stemma I2C board and much more.
by David about Adafruit PyGamer for MakeCode Arcade, CircuitPython or Arduino via REVIEWS.io

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