rfid reader module

8/13/2019 RFID Reader Module

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1 | P a g e A n I S O 9 0 0 1 - 2 0 0 8 C e r t i f i e d C o m p a n y RFID READER MODULE Order Code RDL/3AC/13/001/V1.0

www.researchdesignlab.com

RFID Reader Module

This is a low frequency (125Khz) RFID readerwith serial output with at range of 8-12cm. It is acompact units with built in antenna and can be directlyconnected to the PC using RS232 protocol.

Features

Serial and TTL output. Along with two RFID cards.

Excellent read performance without an external circuit . Compact size and cost-effective .

Applications

Access control Handheld readers Asset management

Specifications

Parameter ValueOperating Voltage 5vCurrent


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Pin Details

Pin Name Details1 gnd Power supply gnd2 rx receiver3 tx transmitter

Working

Many types of RFID exist, but at the highest level, we can divide RFIDdevices into two classes: active and passive. Active tags require a power source

theyre either connected to a powered infrastructure or use energy stored in an

integrated battery. In t he latter case, a tags lifetime is limited by the stored energy,

balanced against the number of read operations the device must undergo. One

example of an active tag is the transponder attached to an aircraft that identifies its

national origin. Another example is a LoJack device attached to a car, which

incorporates cellular technology and a GPS to locate the car if stolen. However,

batteries make the cost, size, and life-time of active tags impractical for the retail

trade. Passive RFID is of interest be cause the tags dont require batteries or

maintenance. The tags also have an indefinite operational life and are small enough

to fit into a practical adhesive label. A passive tag consists of three parts: an

antenna, a semiconductor chip attached to the antenna, and some form of

encapsulation. The tag reader is responsible for powering and communicating with

a tag. The tag antenna captures energy and transfers the tags ID (the tags chip

coordinates this process). The encap sulation maintains the tags inte grity and

protects the antenna and chip from environmental conditions or reagents. The


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encapsulation could be a small glass vial or a laminar plastic substrate with

adhesive on one side to enable easy attachment to goods. Two fundamentally

different RFID design approaches exist for transferring power from the reader to

the tag: magnetic induction and electromagnetic (EM) wave capture. These two

designs take advantage of the EM properties associated with an RF antenna the

near field and the far field. Both can transfer enough power to a remote tag to

sustain its operation typically between 10 W and 1 mW, depending on the tag

type. (For comparison, the nominal power an Intel X Scale processor consumes is

approximately 500 mW, and an Intel Pentium 4 consumes up to 50 W.) Throughvarious modulation techniques, near- and far-field-based signals can also transmit

and receive data.

Sample Application

To view sample code and schematic click the below link:

http://researchdesignlab.com/index.php/modules/rfid-reader.html

Board Dimensions

33.67mm

25mm
http://researchdesignlab.com/index.php/modules/rfid-reader.htmlhttp://researchdesignlab.com/index.php/modules/rfid-reader.htmlhttp://researchdesignlab.com/index.php/modules/rfid-reader.html


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To buy this product click the below link:

http://researchdesignlab.com/index.php/modules/rfid-reader.html

To view the complete datasheet of EM 18 used in RFID module click the below

link:

http://forum.researchdesignlab.com/datasheet/EM18
http://researchdesignlab.com/index.php/modules/rfid-reader.htmlhttp://researchdesignlab.com/index.php/modules/rfid-reader.htmlhttp://forum.researchdesignlab.com/datasheet/EM18http://forum.researchdesignlab.com/datasheet/EM18http://forum.researchdesignlab.com/datasheet/EM18http://researchdesignlab.com/index.php/modules/rfid-reader.html

rfid reader module

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