On Jan 9, 2008 8:09 PM, peter green wrote: > IIRC there are two types of RFID, the magnetic induction based stuff > which is shorter range and the proper radio based stuff which is longer > range. All of the RFID stuff I've seen has been near field coil based communications, especially since the RFID device generally acquires power from that field. There are powered RFID devices, but I've yet to see a device call itself RFID and not rely on near field communications. Of course the acronym, RFID, certainly allows for a variety of mechanisms. I'm no RFID guru, though, so I've only seen a thimble-full worth of it. It interests me greatly. Maybe this year I'll play with it... -Adam -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Moving in southeast Michigan? Buy my house: http://ubasics.com/house/ Interested in electronics? Check out the projects at http://ubasics.com Building your own house? Check out http://ubasics.com/home/ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist