Now I suppose all the usual car power supply caveats apply:  Power supply
must take a two-battery jump or a reversed battery.  Pretty easy with a
series diode, small resistor, 12 volt zener and a 7805 chip.  12 Volt
relays, normally off (meaning the affected system is normally disabled) to
save power when the car is not running.

So I guess the thieves follow the wires to find the mechanisms.  Hopefully I
can hide the brains well enough to make them hard to locate.  Powerline
communications over car wiring sounds like nothing but trouble to me, so
I'll have to hide the wires as best I can.  Work them into a wire harness,
maybe.

Now the GPS option - I suppose this means a dedicated cell phone buried into
the car somewhere, with a little modem .This also means I'll have to pay $$$
a month for a cell phone connection or account.  Seeing as I don't even have
cell phone for my hip, I don't know how much this would cost.

:But say I get one of those grandma accounts that is just for emergencies,
really cheap per month if it is not used more than a few minutes. .  What
would be a good way to activate this gps/cell phone combo?  Say the operator
of the car has to punch in a code, or activate a hidden capacitive sensor in
the dash.  If he doesn't, and the car starts moving for any reason, the cell
phone dials my personal 800 number ( I have one).  and begins sending GPS
coordinates.  I suppose I'd also need to keep the capability of using a
modem on my home computer (all my modems are in a drawer somewhere..)  or a
quick way to send a web page........

Let's guess how much would all this cost to implement, up front and per
month charges?  Any way to do it that doesn't interface with a cell phone?
Radios? Would the antannaes have to be sticking out of the roof?  How to
disguidse them?

Another good theft control plan is to bash your car into a telephone pole,
paint each quarter panel several clashing colors, and add a large gaudy art
object on the roof.
--Lawrence




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