Parallax RFID Card Reader – Serial (28140)

The RFID Card Reader can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, robotics, navigation, inventory tracking, payment systems, and car immobilization.

There are a variety of RF transponder tags that come in different packages. Each tag has a specific range that is within 10% of the given distance for each type of tag. The reason for the 10% is due to environmental conditions and RFID modules.

RFID Module & Tag Compatibility Chart available on the Parallax website.

Key Features:

• Low-cost method for reading passive RFID EM4100 family transponder tags
• 2400 baud serial interface
• Enable input allows module to be enabled/disabled by software
• Bi-color LED for visual indication of status

Application Ideas:

• Robotics
• Payment Systems
• Automatic Identification

Note: This device can be connected to a PC serial port using a MAX232 line driver. The circuit isn’t supported by Parallax, but it’s possible to make this connection with a few dollars of parts or by using the USB version of the reader (Part #28340). There is an outline of connections on the Parallax forums.

RFID Card Reader Details: