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RFID Card Reader/Writer, 125kHz EM4x50 Compatible, 4-pin Serial US$49.99

28440
RFID Card Reader/Writer, 125kHz EM4x50 Compatible, 4-pin Serial

This board provides a low-cost solution to read and write passive 125kHz RFID transponder tags up to three inches away. The compatible RFID transponder tags will provide a unique serial number and can store up to 116 bytes of user data, which can be password-protected to allow only authorized access.

The RFID Read/Write Module can be used in a wide variety of hobbyist and commercial applications, including access control, user identification, robotics navigation, inventory tracking, payment systems, car immobilization, and manufacturing automation.

The RFID Read/Write Module features an EM Microelectronics EM4095HMSO16A chip connected to a Microchip PIC16F723 microcontroller. It works with EM4x50 1kbit R/W transponder tags at 125kHz. Optionally, EM4100 read-only tags can be read with the RFID ReadLegacy command. A variety of different tag types and styles exists. Each EM4x50 tag contains a unique, read-only serial number (one of 2, or 4,294,967,296 possible combinations) and 116 bytes of user data area stored in a non-volatile EEPROM. The user data area can be secured optionally with a 32-bit password to allow only authorized read and write operations.

The RFID Read/Write Module is controlled by the host via a standard asynchronous serial communications interface configured at 9600bps, 8 data bits, no parity, 1 stop bit, and least significant bit first (8N1). The serial data expected and transmitted by the RFID Read/Write Module are 5V TTL-level, non-inverted.

A visual indication of the RFID Read/Write Module's state is given with the on-board LED. When the module is successfully powered up and is in an idle state, the LED will be green; when the module is in an active state (e.g. searching for a valid tag or performing an operation on the tag), the LED will be red.

RFID Read/Write Module Features

  • Low-cost method for reading and writing passive, 125 kHz EM4x50 RFID transponder tags
  • Up to 116 bytes of user data storage on a single tag
  • Optional security features prevent tag from being read or written without password
  • Bi-color LED for visual indication of status
  • Voltage requirements: 5V DC
  • Current requirements: Less than 10mA idle; approx. 100-200mA active
  • Communication: asynchronous serial 9600 bps, (8N1); 5V TTL-level, non-inverted
  • Dimensions: 3.25 2.45 inches (82.6 62 mm)
  • Operating temperature: 32 to 158 F (0 to 70 C)

Module Pinout

Pin Name Function
1VCCSystem power. +5V DC input
2SINSerial input from host. TTL-level interface, 9600 bps, 8 data bits, no parity, 1 stop bit
3SOUTSerial output to host. TTL-level interface, 9600 bps, 8 data bits, no parity, 1 stop bit
4GNDSystem ground. Connect to power supply's ground terminal

RFID Read/Write Module Resources


Optional Recommended Products for this Item
RFID Card Tag, 125kHz, EM4x50 Read/Write+ US$3.25

This product was added to our catalog on Tuesday 17 September, 2013.

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