RFID operation

It is very interesting to know how RFID's work. Those Id's you hold in your hand and they can be read remotely from a near distance. For sometime I was not really excited about their operation but became super excited to learn that they transmit the information. Home come they transmit anything if they do not have batteries. Then comes the next part, they do not have batteries but they receive power from the reader which is another fascinating idea. Here is the full details of how the RFId work. RFID's are now used in many applications (ex. Passports, Credit Cards, Security Cards, Transponders, etc....)

http://www.forestindustries.vt.edu/rfid/rfidworks.html