MFRC522 RFID Overview and a Sample Arduino Project

The MFRC522 RFID reader module is available at low cost and allows easy experimenting with MIFARE RFID tags and cards.

Here's an overview of how RFID works, a demonstration of reading and writing data in the 1K MIFARE EEPROM sectors/blocks, and a sample project incorporating an RFID access control system that can be used as the basis for a door lock etc.

Sketch & Wiring Diagram https://github.com/GadgetReboot/MFRC522

Previous Videos Covering Some Topics Talkie Speech Synthesis https://youtu.be/O_yl5kcRO5w I2C LCD Displays https://youtu.be/lr1x96s3TKY

Datasheets https://www.nxp.com/docs/en/data-sheet/MFRC522.pdf https://www.nxp.com/docs/en/data-sheet/MF1S50YYX_V1.pdf

RFID General Info https://www.researchgate.net/publication/310465148_How_does_passive_RFID_works_briefly_explained https://www.researchgate.net/figure/Schematic-representation-of-the-RFID-tags_fig3_288905515 https://www.engineersgarage.com/article_page/passive-rfid-tags/

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