Cunning Hack: AVR Tiny as an RFID tag.

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pragma
Posts: 175
Joined: Sat Sep 20, 2008 2:16 am
Location: Washington, DC

Cunning Hack: AVR Tiny as an RFID tag.

Post by pragma » Sun Jun 28, 2009 10:41 pm

I saw this on hackaday.com today. Just when you think you've seen what these little AVR chips can do, another surprise shows up.
Last time, I posted an ultra-simple "from scratch" RFID reader, which uses no application-specific components: just a Propeller microcontroller and a few passive components. This time, I tried the opposite: building an RFID tag using no application-specific parts.

Well, my solution is full of dirty tricks, but the results aren't half bad. I used an Atmel AVR microcontroller (the ATtiny85) and a coil. That's it. You can optionally add a couple of capacitors to improve performance with some types of coils, but with this method it's possible to build a working RFID tag just by soldering a small inductor to an AVR chip [...]
Read on to see how he gets wireless power, clock and signal, all from a wire coil soldered directly to the chip:

http://scanwidget.livejournal.com/32928.html

kazirahul
Posts: 1
Joined: Wed Aug 05, 2009 1:59 pm

Re: Cunning Hack: AVR Tiny as an RFID tag.

Post by kazirahul » Wed Aug 05, 2009 2:09 pm

Just when you think you've seen what these little AVR chips can do, another surprise shows up.

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