134kHz,What frequency, what kind of tags, what are the ratings on the reader?
Both HDX and FDX-B tags ( I must read both of them ),
I use EM4095 for now, and it reads only 10 cm,
I mean the distance between th reader and the tag is nearly 10cm,
And I want to make it approximately 50cm.
hi, if u google it "em4095 booster circuit" u can find em marine application circuit for em4095 incerasing read range. They saying card type transponder can reach 30cm read distance. Accualy i need ring type transponder 50cm about. I am thinking change the driving part of the booster circuit.Hello Unpro, i am working on the same device than you (EM4095 reader chip RFID) and i'm put the same question : how can i increase de reader distance between 30 - 40cm ?
i saw that i had to add an external envelope detector but i don't understand how does it work !
What is the type of the MOSFET transistor ?
How to control it with the processor?
I you can help me, i will be I would appreciate.
Thank in advance
http://www.priority1design.com.au/hdx_animal_identification_protocol.html i think that link will give you an idea about read hdx tag with em4095.Very interesting, could you share how do you read HDX tag with EM4095 chip? I made only FDX reading and now thinking how to implement HDX reading....
I couldnt find it can u help me? are you sure about that 134khz ?I read the article year ago of Israeli golden youth creating as the school project a certain rfid reader what works 1/2-3/4 meter afar to test the hypothesis that any walking along man on the street may hidden steel all codes You have in the cards in the wallet (including the bank account and money). They prove they got: yes, it is possible with 30 cm frame and 5W transmitter without of any more deep modifying the receiver part of prost 1 USD ebay device. Look at Google, it should still hang there.
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by Robert Keim
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