Russell,
     They come in two different flavors. One of them is active and the=20
other one is passive. The active one is activated by a person pushing a=20
button on a key fob. This shuts the engine down and it can be setup to=20
lock the doors and disabled the windows if they are electric. A video=20
camera can be setup to come on when the system is triggered.The engine=20
will still crank but it won't start.
     The passive one has a small transmitter that is active when ever=20
the driver or the owner drives their car. It is a RFID type setup and=20
once the car drives out of range the engine shuts down. The driver=20
doesn't have to do anything except keep the key fob in their pocket.=20
This system does everything else that the active system does.
     When the engine quits the thief thinks that he grabbed a bad car=20
and he takes off. Remember most thieves don't want a confrontation They=20
just want the car.
Thanks,
rich!

On 11/18/2014 8:25 PM, RussellMc wrote:
> On 19 November 2014 14:34, IVP <joecolquitt@clear.net.nz> wrote:
>
>>> I am not interested in harming the thief
>
>> Adding a timer, eg to disable the ignition after a period long enough
>> for the car to get on the road, would have to be done so that the car
>> comes to rest where it can do no harm. For example you wouldn't
>> want it to stop dead in the middle of the intersection at the end of
>> your street or lose power steering in an awkward or dangerous place
>>
> I've heard of anti-hijack systems that allow someone to take your car fro=
m
> you at eg traffic lights, as happens*, and the car functions OK for a sho=
rt
> distance, thenbegins to"miss" and does so to an increasing extent, until
> abandoning it (and probably finding another :-( ) becomes an attrractive
> option.
>
> This has the advantage that it may not be realised that it is obvious anm=
d
> they may just think they stole a lemon and MAY spare it from major reveng=
e
> aggro. May.
>
> * In some places, I'm told.
> Little doubt it will come in due course, but not generally known here, ye=
t.
>
>
>                Russell

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.