Passive RFID
Okay kiddo, imagine you have a special toy that you really like to play with, but sometimes you forget where you put it. Wouldn't it be great if the toy could tell you where it is all by itself? That's kind of how passive RFID works.
RFID stands for Radio Frequency Identification. It's like a tiny computer chip that can store information and talk to other devices using radio waves. Passive RFID is a type of RFID that doesn't need any batteries to work - it gets its power from the radio waves that are sent to it.
Let's say you have a book that has a passive RFID tag inside it. When you take the book out of the library, the RFID tag gets activated by a special machine that sends out radio waves. The tag then sends back a signal with its own unique code, like a secret password. The machine records this code and adds it to a list of all the books that have been checked out of the library. Later, if someone tries to take the book out without checking it out first, the machine will recognize the tag's code and sound an alarm to let the librarian know.
Passive RFID can be used for lots of other things too, like tracking inventory in a store, making sure that hospital patients get the right medicine, and even identifying pet cats and dogs. It's a very clever little technology that makes it easy to keep track of important things without even thinking about it.
RFID stands for Radio Frequency Identification. It's like a tiny computer chip that can store information and talk to other devices using radio waves. Passive RFID is a type of RFID that doesn't need any batteries to work - it gets its power from the radio waves that are sent to it.
Let's say you have a book that has a passive RFID tag inside it. When you take the book out of the library, the RFID tag gets activated by a special machine that sends out radio waves. The tag then sends back a signal with its own unique code, like a secret password. The machine records this code and adds it to a list of all the books that have been checked out of the library. Later, if someone tries to take the book out without checking it out first, the machine will recognize the tag's code and sound an alarm to let the librarian know.
Passive RFID can be used for lots of other things too, like tracking inventory in a store, making sure that hospital patients get the right medicine, and even identifying pet cats and dogs. It's a very clever little technology that makes it easy to keep track of important things without even thinking about it.