Just a note that will spare anyone else from making this stupid mistake: Practically all of the RFID tags that are designed for implantation into animals or for general-purpose product tagging (such as those made by TI and others) are designed to operate at 134 kHz. If you are making an RFID reader that must operate with existing 134 kHz tags, the ID-12 absolutely will not work for you. I have a pretty diverse collection of implantable tags, and none of them generates any output from the ID-12. (I’ve designed a reader based on the TI TMS3705 chip, operates at the correct frequency for those tags, and with some help from TI tech support and a fair amount of blood, sweat and tears, it works well.) I’d hoped to be able to use a premade module, and obviously I made the bet that hope trumps reason. Epic fail!
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