Conversation turns to the Flipper Zero, and aspects of its design, and one of the parts we end up talking about is its built-in 125 kHz RFID reader. It’s a surprisingly complex circuit with a ...

which could perhaps be considered something of an interactive circuit diagram, allows anyone with a paper printer and a few passive components to make a functional low-frequency RFID sniffer.

Also called an "RFID interrogator." The maximum distance between the reader's antenna and the tag vary, depending on application. Credit cards and ID badges have to be brought fairly close to the ...

The RFID tags that are routinely inserted into shipping boxes are passive RFID tags, which comprise an antenna, a small integrated circuit ... 20 feet by a dedicated reader that emits radio ...