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EDISON SCIENCE CORNER on Instagram: "RFID MODULE This is a RC522 RFID Reader/writer module. It comes with a RFID card and RFID keychain. The RC522 operates on 13.56MHz and the operating voltage is 3.3V. it has 8 pins and works based on SPI Communication. We need a microcontroller like arduino to build different projects like RFID attendence system , automatic door lock etc. #rfidmodule #arduino #sensor #electronics #diy #engneering"