RFID Systems
RFID (Radio-Frequency Identification) systems use electromagnetic fields to automatically identify and track tags attached to objects. These systems consist of RFID tags (which store data) and RFID readers (which wirelessly read the tags), enabling contactless data transmission for applications like inventory management, access control, and logistics. They operate at various frequencies (e.g., low, high, ultra-high) and can be passive (powered by reader signals) or active (with their own power source).
Developers should learn RFID systems when building solutions for real-time asset tracking, supply chain automation, or secure identification, as they offer advantages over barcodes like non-line-of-sight reading and durability. Use cases include retail inventory systems, electronic toll collection, and smart access cards, where efficiency and data accuracy are critical. Knowledge is also valuable for IoT projects integrating hardware and software for sensor-based applications.