RFID Writers

RFID Copier Duplicator 125KHz Key fob NFC Smart Card Reader Writer 13.56MHz Encrypted Programmer USB UID T5577 EM4305 Cards Tags

• Only works on Windows.  On Linux dmesg shows a lot of errors.  It's not recognized as virtual com-port or anything.
• When connected to the PC, it shows up as flash drive that contains the reader software.
• The reader software consists of a left side for 13.56MHz, the right side is for 125kHz.
• Bring a 125kHz tag within range.  A double beep will indicate that the tag is recognized.  Then press the "read EMID" or "write EMID" button.
• For 13.56MHz tags, the functionality is unclear.
• It can write empty 125kHz tags delivered with the 5YOA reader, but it can't overwrite them
• Also reads my own created RFID tag.

Handheld 125KHz EM4100 RFID Copier Writer Duplicator Programmer Reader + EM4305 T5577 Rewritable ID Keyfobs Tags Card

• Based on a PSoC.  Nothing much left to hack.  No method to extract read tag data.
• Doesn't read my own created tag.
• Use: bring tag within read range and then press read or write button.
• Can rewrite the tags delivered with it.

Own designs

• CircuitMaker attiny-rfid-tag
• Emulatorrfid

RFID Reader modules

• RDM630 : 125kHz, 5V
• RC522 : 13.56MHz