Here you will learn how to connect an Arduino to a 16x2 LCD display. As a result, understanding how to attach an LCD module to an Arduino is crucial when designing embedded systems. LCD modules are a critical component in many Arduino-based embedded systems. How to Interface 16x2 LCD with Arduino Uno ? Passive RFID: The reading antenna, whose electromagnetic wave generates a current in the RFID tag's antenna, provides power to a passive RFID tag.Active RFID: An active RFID tag has its own source of power, which is usually a battery.RFID tags are divided into two categories: passive RFID tags & active RFID tags. When the tag is turned on, it sends a wave back to the antenna, which is converted into data. It transmits signals that trigger the tag using radio waves. An RFID reader is created when the scanning antenna and transceiver are combined. The RFID reader is a network-connected device that can be either portable or fixed. It comes with an RFID card and a key tag having 1KB memory.Ī scanning antenna, a transceiver, and a transponder are the three components of every RFID device. The module also supports I2C and UART communication. A 4-pin Serial Peripheral Interface (SPI) allows the reader to communicate with a microcontroller at a maximum data rate of 10Mbps. The RC522 is a 13.56MHz RFID module built on the NXP semiconductor's MFRC522 controller.
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