RFID Card Reader - Serial

The RFID Reader Module 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.

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. There is an outline of connections on the forums.

Details:

• Reads 125 kHz Tags, EM4100 Family
• Power requirements: 4.5 to 5.5 VDC
• Communication: Serial at 2400 baud (8N1)
• Dimensions: 2.45 x 6.25 x 0.22 in (62.2 x 82.5 x 5.57 mm)
• Operating temp range: -40 to +185 °F (-40 to +85 °C)

Compatible tags:

• 54x85mm Rectangle Tag ISO Card: 6.3cm (2.5″) +/- 10%
• 50mm Round Tag World Tag 50mm: 6.8cm (2.7″) +/- 10%
• Blue Eye Key Fob
• 25mm Disk Tag