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How to build an EAS gate?

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mr_red

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Hi guys

i would like to build , like an eas gate, what should i do first?
is theres dev board that i can buy from element14 and rs ?
i am from the philippines,

thanks

BTW i am planning to use this tags 2000 CHECKPOINT 8.2MHZ RF SOFT TAGS (LABELS) | eBay

what should i do to build the eas gate?

this project would be implemented on a library which the rf stickers will be sticked on the books, in order the student bring the books out the library they should login on a computer (where the diy eas gate should be connected to be able to send signals( to the computer to check if the book is clear )

my desired design for the sensor is like a pir motion sensor with a rf to check the book, which it is atleast 15-30 degrees angle to check if a book with the rfid sticker on it is clear to leave
 

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