A reliable workhorse I've used for years across countless projects — the RFID-RC522 reads and writes 13.56MHz contactless cards and tags over SPI, making it easy to add access control, game triggers, or e-textile tag readers to any Arduino or microcontroller project.
Comes with a standard S50 blank card and a keychain tag to get you started immediately.
Key Features
Chip: MF RC522, 13.56MHz contactless communication
Protocol: ISO 14443A compatible
Interface: SPI (up to 10Mbit/s)
Data transfer: up to 424kbit/s
Voltage: 3.3V
Includes: S50 blank card + keychain tag
Specifications
Active current: 13–26mA @ 3.3V
Idle current: 10–13mA @ 3.3V
Sleep current: <80µA | Peak: <30mA
Operating temp: -20 to 80°C | Storage: -40 to 85°C
