RFID Reader / Writer / RF-IC MFRC-522 RFID Card Reader / with KeyChain RF-Card for AVR/STM/PIC

MFRC-522 is an RFID (Radio Frequency Identification) reader/writer module used in various applications for contactless communication. Here are the key features and details of the MFRC-522:

* Functionality: The MFRC-522 is a highly integrated reader/writer IC for contactless communication at 13.56 MHz. It supports ISO/IEC 14443 A/MIFARE and NTAG, making it compatible with many RFID cards and tags.

* Operating Frequency: It operates at 13.56 MHz, which is a common frequency for RFID communication, allowing it to interact with a wide range of RFID tags and cards.

* Communication Interface: The module communicates with microcontrollers and other devices via SPI (Serial Peripheral Interface), making it easy to interface with popular development boards like Arduino, Raspberry Pi, and others.

* Power Supply: It typically operates at 3.3V, but some modules come with a voltage regulator allowing them to work with 5V systems.

* Range: The read range of the MFRC-522 is typically around 5 cm (2 inches), depending on the antenna design and the tag being used.

* Features:
* * Integrated Analog Circuitry: It has built-in analog circuitry to handle the RF (radio frequency) signals, reducing the need for external components.
* * Low Power Consumption: The module is designed to consume low power, making it suitable for battery-operated devices.
* * Support for Various Protocols: It supports multiple communication protocols, enhancing its versatility in different applications.

* Applications: The MFRC-522 module is used in a variety of applications, including:
* * Access Control Systems: For secure entry systems in buildings and vehicles.
* * Contactless Payment Systems: Used in payment terminals for contactless transactions.
* * Inventory Management: For tracking and managing inventory in retail and warehouses.
* * Identification Systems: For personal identification and attendance systems.
* * IoT Projects: Often used in DIY electronics projects involving Arduino, Raspberry Pi, and other platforms.

* Typical Module Components:
* * Antenna Coil: For transmitting and receiving RF signals.
* * MFRC-522 Chip: The main IC for processing RFID communication.
* * SPI Interface Pins: For communication with the host microcontroller.
* * Power Supply Pins: For providing the necessary voltage to the module.