I am working on a Project for wich I need the ability to determine the location of multiple balls in a bowl and controlling 3 different LED colors in the ball.
At first I wanted to use XBee modules and time measureing to do that, but some research showed that, this is not possible because it's just too fast.
So I want to use RFID.
Every ball, wich is about 4cm(1.6in) to 5cm(1.9in) in diameter, has a RFID Tag, and a reader. By knowing wich balls are near a ball, and where the bowls wall is, i can determine the positions of all balls.
The DIY-Reader (http://arduino.cc/playground/Main/DIYRFIDReader
) seems to be great for this job, because I can do the coils myself so they fit to the ball.
Is it possible to use the DIY-Reader to scan multiple tags in range?
I want to use a XBee module to send the neighbours to a computer, wich does the logic stuff, and then sets the balls LEDs.
Will this be possible with the Arduino Pro Mini?
I am worried about the amount off connectors, because I need to connect the RFID-Reader, the XBee module, and 3 LEDs (actually more, because I need to illuminate the ball, but I need 3 colors).