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Electrical engineers at Stanford built a cardiac device that uses a combination of inductive and radiative transmission of power, at about 1.7 billion cycles per second, to its coiled receiving antenna.
ENGADGET: Stanford researchers make heart implant powered by radio waves, put batteries out of a job
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So not only does the collar have to withstand enormous force but it needs to contain a GPS device, a cell component for data transmission, and battery power for a full year.
FORBES: Move up http://i.forbesimg.com t Move down
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The Federal Electricity Regulatory Commission (FERC) passed a rule last week, Order No. 1000, that aims to facilitate the building of transmission infrastructure, the wires that bring us electricity from the power plant or other generation device.
FORBES: New Transmission Lines: Coming to an Area Near You?
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Embedded inside it is a batteryless RF switch, and the way it works is that upon the release of the spring mechanism inside, a tiny bit of power is generated for the 2.4GHz RF transmission ( ZigBee compatible), and whatever device is connected to the RF control outlet on the other end will receive the on or off signal.
ENGADGET: Mitsumi exhibits micro-vibration power generator and batteryless RF switch (video)