arduino › connectivity module
nxp MFRC522 13.56MHz RFID Reader
Reads MIFARE Classic / Ultralight cards. NOT 5V tolerant — use only with 3.3V boards or level-shift. Picked for door locks, attendance systems, badge scanners.
Specifications
- protocol
- rfid_13_56mhz
- interface to mcu
- spi
- voltage v
- 3v3
- range m
- 0.05
- power consumption ma
- 30
Sources
- SparkFun open product catalog · ingest 2026-05-06