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The PhidgetRFID reads RFID tags that are
brought in close proximity to the reader and returns the tag
identification number.
RFID (radio frequency identification)
systems use data strings stored inside RFID tags or
transponders) to uniquely identify people or objects when
they are scanned by an RFID reader. These types of systems
are found in many applications such as passport protection,
animal identification, inventory control systems, and secure
access control systems.
The PhidgetRFID (as well as the RFID
tags sold by Phidgets) uses the EM4102 protocol. Any other
tags that also use the EM4102 protocol can be used with the
PhidgetRFID reader.
Because passive tags require a strong
RF field to operate, their effective range is limited to an
area in close proximity to the RFID reader. The distance
over which the RFID tag is usable is affected by such things
as the tag shape and size, materials being used in the area
near the reader, and the orientation of the reader and tag
in respect to each other and in their operating environment.
The smaller a tag, the closer it must be to the reader to
operate.
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