How are u supposed to use an RFID with a robot.....
RFIDs are useful for other things like personnel access, super market product reference.... and other things....
I can not really see any use in robotics...
And hey..... If you want to build one you are supposed to know of physics, behavior of electromagnetic waves and such....
You see the tag is passive, the reader emits a electromagnetic field charging the tag's internal capacitor, then
the tag, shorts it's coil in a serial communication method, the shorting of coil is like a mechanical wave hitting a wall...
The wave is reflected, and read by the reader.... So you get the rest....
It's a nice concept, still a little hard to materialize if you know little, like how to make an antenna and such....