What Is Radio Frequency Identification Reader (RFID Reader)?

Radiofrequency identification readers (RFID readers) are like tiny little spies, gathering information from the tags in your stuff and sending it back to you. They're not just for tracking your belongings—they can also collect data about other things! You can even use them to track people if you're a crazed stalker! If you're wondering what an RFID tag is and how it works, it's a tiny computer chip containing information about whatever object it's embedded. The tag doesn't have any power—it needs an outside source like a reader or antenna to get its instructions and send back data. Radio waves also transfer data from the tag to a reader. This process is called electromagnetic induction: when radio waves hit an electrical conductor (in this case, metal), they create an electric current; when they hit an inductor (like a loop of wire), they create a magnetic field; and when they hit both at once. Magic happens! The current flowing through the wire creates eddy currents in other nearby cables and magnetic fields around those wires, creating eddy currents in a still more nearby wire. When you think of how many times you've had to wait in a line, trying to find the item you're looking for—and then having to wait again while you get the attention of a clerk to find out where that item is located—it's clear that there's a better way. That's why RFID technology is so exciting. It's similar in theory to bar codes, but instead of requiring line-of-sight to a reader and being scanned directly, an RFID tag can be within the range of an RFID reader and still be read. Multiple items can be checked quickly and easily, even when surrounded by other items on the shelf or in your bag. So what does this mean for you? It means you won't have to wait longer than necessary when you're at the store!