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The answer could be... (archive)

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Posted by chris on October 11, 1999 at 00:18:18:

In Reply to: Stupid Question posted by Don S. on October 10, 1999 at 11:47:41:

>> How does the plastic key send/receive information since its not a conductor ? Or is it some special material that is still conductive ?<<

Don -

It is my belief that conductivity of the key is not a requirement, but it is an inductor/resonator-type device. There must be some coded device that resides in the head of the key that is engaged by RF from the car. I'm thinking something like those inventory control devices that you see at department stores -- no metal-to-metal contact there!

Just my thoughts...

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