The iButton® is a computer chip enclosed in a 16mm thick stainless steel can.The steel iButton can be mounted virtually anywhere because it is rugged enough to withstand harsh environments, indoors or outdoors.Each iButton has a unique and unalterable address laser etched onto its chip inside the can. The address (e.g. 2700000095C33108) can be used as a key or identifier for each iButton...(more)
Here are videos explaining some of the uses
