Software-only RFID reader

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By: Micah Dowty, created: 2013-04-16 | updated: 2013-05-20

This is an RFID reader object, compatible with the tags sold by Parallax (EM4102) as well as the 125 kHz prox cards sold by HID Corporation. It requires no external hardware other than an antenna coil and a few resistors and capacitors.

More info on the forums at:

Includes a simple access control example app, which actuates a relay when an RFID code matches a hardcoded list.


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Package icon rfid-lf-20080901.zip14.8 KB