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How Does A Door Swipe Card Work? [Solved]
The card reader on the door constantly emits a Radio Frequency energy Field. When a card crosses the field, the power from the field energizes a copper wire inside the card, which powers the chip containing the card number and any other unique data.
how are the locks WORK on a hotel “card swipe” door
… about the
Overcome limitations of RFID based card readers using Cloudastructure SmartKey
http://cloudastructure.com/products/cloudastructure-smartkey/overcome-limitations-rfid-based-
Basics of Access Control
A first look at
