World Champion Big Eclipse

So today's topic covers using RFID with sound(s). The image above depicts the use of RFID and sound on the NXT brick. This simple program starts out with implementing the RFID sensors and connecting them to a Logic block. The input we are looking for in this case is the 'AND' operator. We then connect to a Switch block which contains our first sound (can be any sound) and a simple motor movement. When we pass the RFID keyfob (any) transponder before the RFID sensor, out robot plays a sound and moves forward. The second stage of the program does pretty much the same thing, in reverse, but with one key exception; we use a second keyfob transponder. This was done to experiment with using multiple transponders to see how it would work. The key thing to remember when using multiple transponders is to be certain to do a "Live Update" and click the "Current Transponder" button in order to uniquely identify each transponder. Sound, movement, just about anything is possible using RFID on the NXT.