Suggestion for RFID 125KHz Tag Emulator Chip

Hi.

I need to make a RFID 125KHz Tag Emulator which can take the ID as an input (preferred UART or I2C) and Transmit the data through Coil (RF). So a nearest RFID reader can read the ID which is coming from Emulated Tag.

I found some projects which are MCU based. Like below:

http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag/

I am mainly looking for a ready-made Chip (not a MCU) which can take the ID and Transmit through Coil over RF ....

Any advise please?

Regards.

You can buy RFID card that are writable. like this one:
http://www.alibaba.com/product-gs/611727875/125khz_writable_rfid_card.html?s=p

Hi Ajay.

Actually I am looking for a Chip. Not a writable tag. Any other suggestion?

Regards.

I need to make a RFID 125KHz Tag Emulator which can take the ID as an input (preferred UART or I2C) and Transmit the data through Coil (RF). So a nearest RFID reader can read the ID which is coming from Emulated Tag.

I am mainly looking for a ready-made Chip (not a MCU) which can take the ID and Transmit through Coil over RF ....

sakibnaz

I think a modified version of the http://scanlime.org device is your best bet.

Custom chips with fixed IDs would be made in 1000s for tag makers.
I can't think of many reasons to create changeable IDs,
so the demand is not there.

he actually wants to make a repeater for tags.