RFID using u2270b

Go To Last Post
2 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi,

I am looking for some help with a circuit using the Atmel u2270b. I have had some boards built for an RFID lock and I cant seem to get the U2270b to communicate with a Atmel tk5551 chip. I did all the development using the Atmel dev kit and got the lock working but now with my own designs it wont work.

When I monitor the output pin and put the tk5551 chip near the antenna I don't get any change at all (no communication). I do not have any RF experience so i am really struggling here any help would be appreciated, i have attached the schematic of the RFID module.

thanks

James

Attachment(s): 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

goujam wrote:
Hi,

I am looking for some help with a circuit using the Atmel u2270b. I have had some boards built for an RFID lock and I cant seem to get the U2270b to communicate with a Atmel tk5551 chip. I did all the development using the Atmel dev kit and got the lock working but now with my own designs it wont work.

When I monitor the output pin and put the tk5551 chip near the antenna I donHello James,

My name is Orris. I'm doing an RFID project that uses the TK5551 but with NXP's HTRC11001 instead of the Atmel U2270 as the transponder chip. I sort of have the opposite problem from you: I'm getting data back from the TK5551, but cannot affect it with commands from the microprocessor. There is some mystery still to the configuration of the TK5551.

I'm unable to print out your schematic to look over the U2270 lash up. If we can figure out how to send schematics to each other, I can probably help you make your transmitter section work. I've a fair bit of experience with RF and am presently employed designing receivers and transmitters in the 16 Hz to 223 kHz range. Let's trade knowledge.