Dejan Levec

RFID Reader

Code
Latest source code is available at http://www.dejanlevec.com/code/Microcontrollers/RFID-Reader/14-Jun-2009/.

Hex file is available only for ATmega8 at 16MHz. Host executable is available only for Intel Macs with latest software update.

Currently you need to request ID from a device.
Example: ./set-led status

Receiving ID when tag is scanned is still in progress. (I have some problems with USB interrupt-in)

Circuit
Components for USB are connected as usual. (D+ on PB2, D- on PB4). Green LED is connected to PC5 (28), yellow LED to PC3 (26). TX from RFID module is connected to RX on AVR (PB0 on ATMega8/168).

Parts
RFID module (seeedstudio – $12.50)
RFID tags (seeedstudio – $2.50)
ATmega8 microcontroller (or similar)
16Mhz quartz (or 12Mhz)
2x 3.6V or 3.3V zener diode
1x green LED
1x yellow LED
2x 68 R (or other 12 – 100 ohm resistors)
1k5 resistor
10 uF capacitor
2x 330 ohm
28 pin socket

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