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Or in this science project, use the RFID reader as part of a music synthesizer. You could use one on the door of your room-give your friends an RFID card and then you can tell if that knock on your door is a friend or a bothersome sibling. For example, you could mount one on a robot, and as the robot moves about the room it could figure out its location by reading RFID tags you have left for it to find. Several companies sell small RFID readers that are meant for experiments and fun applications. You are going to use a small hobbyist RFID reader to make a musical instrument that sounds just like the real thing. RFID can be controversial as well (it raises privacy issues), but it can also be a lot of fun. It is also a great technology for warehouses for instance, a commercial RFID reader mounted on a forklift can read an RFID tag from 100 or more feet away and help the operator identify what might be inside a box. Unlike magnetic stripe cards that require you to slide the card through a slot, an RFID reader can simply recognize the card from a distance away and get the information that is stored on it. It is often in the form of a card that you might have received as a school ID or a bus pass, but can also be found in the windshield transponder device that lets your parents drive through a tollbooth on their daily commute without stopping. RFID is an increasingly popular way for people to pass information to a computerized system. Why is some of the best technology wasted on boring stuff? What if you could take a radio frequency identification (RFID) reader and turn it into a fun musical instrument?