RFID USB Reader
skladem
Description: The RFID USB Reader is a simple to use, USB to serial base unit for the ID-2, ID-12, and ID-20 readers. Simply plug a reader into the headers and attach a miniUSB cable. Open a terminal program of your choice at 9600bps 8N1, then scan your 125kHz ID tag and the unique 32-bit ID will be shown on the screen. The unit is based on a FTDI chip and comes with a read LED and buzzer. This new revision uses SMD headers for the RFID module, and has a solder jumper which allows you to disable or enable the buzzer. Note: This product does not come with the RFID reader. Check related products for compatible readers. Dimensions: 1.4x1.2x0.57"
Schematic 
Eagle data 