to design 125khz rfid reader and tag

hi
can someone plssssssssssss help me to design rfid reder and tag for my project.....im looking to do project based on rfid and planning for tracking things using rfid reader...read range is around 3 to 4 feet....
plz send me the circuit for both...itz great help for me...and if u have plz send some data sheets related to my project..

Thanks in advance.

xxxxxxxx@xxxxx.xxx
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Thats quite a long range for 125KHz RFID, it is normally used for close proximity, up to about 20cm (10 inches).

Brian.

As Brian mentioned, range of 125KHz RFID is limited to about 10 to 12 inches, while the range of 13.56MHz RFID is approximately 3 feet.

If you need ranges greater than 3 feet you'll need to look at 433MHz VHF RFID or 915MHz UHF EPC RFID.

BigDog