Where does the power come from?

[Frank_Marrone]

Like dave said, the tire sensor is powered by RF energy.  I knew a guy who
claimed to have been part of the development team for an early version of this.
 He said that the driving force for having such a device was to obtain lower
rates from insurers of "18 wheeler" type shippers.  The 18 wheeler drives
through a checking station (presumably at their operations base) which radiates
a RF field, the "in the tire" sensors use the energy to power their
transmitters to supply the tire pressure info.  In this way all 18 wheels could
be checked in very little time each time the truck readied to leave the depot.


-- 
Frank Marrone at marrone at optilink.dsccc.com
1965 Sunbeam Tiger B9471116
1960 Sumbean Pintopine Series I B9009330
1966 Ford LTD 4-door family barge.