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RFID读卡器串行（# 28140）RFID读卡器USB（# 28340）
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Designed in cooperation with Grand Idea Studio （www.grandideastudio.com）， the Parallax Radio Frequency Identification （RFID） Card Readers provide a low-cost solution to read passive RFID transponder tags up to 4 inches away. The RFID Card Readers 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 Card Reader is available in two versions： A TTL-level serial interface for use with a microcontroller and a USB interface for direct connection to a computer.
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