XPost: alt.autos.toyota, rec.autos.tech, alt.autos.honda   
   From: Skenny@highstream.invalid   
      
   Hachiroku ハチロク wrote:   
   > On Tue, 21 Aug 2007 08:24:26 -0700, John S. wrote:   
   >   
   >   
   >>>Or, a little more sophisticaed: put a switch inside the car. Now, this   
   >>>would mean triggering the 'alarm' when getting into the car, something I   
   >>>don't want to do at 1 AM when I'm leaving on my 'paper route'. So, some   
   >>>kind of delay would be good. I was thinking a capacitor between the hot   
   >>>line and the 1st relay, so the cap charges and when it reaches charged   
   >>>it triggers the relay and starts the flasher.   
   >>   
   >>   
   >>All I've read so far are questions about how the car owner would switch an   
   >>unidentified alarm system off and on.  Since you are not buying an   
   >>off-the-shelf alarm what kind of alarm system are you proposing.  And more   
   >>importantly how will the alarm be triggered by a potential intruder.   
   >   
   >   
   > All I want is something that will blow the horn, and maybe flash the   
   > lights.   
   >   
   > In it's simplest form, a switch mounted somewhere outside the car that   
   > turns the system 'on' by providing a ground path for a relay. When someone   
   > opens a door, the relay closes, current is passed to a flasher (like for   
   > your turn signals) and then to the horn and headlight relays. Very simple.   
   >   
   > Also, this is instantaneous. As soon as they open the door, the horn   
   > starts. There is an 'always on' current source (courtesy lights) that do   
   > not turn off when the dome light is turned off, so I intend to use this   
   > for the 'trigger'.   
   >   
   >   
   looks to me like you have it all figured out. So why are you asking us this?   
   You know you could give away your secret device.   
   For instance, from this conversation thus far, if I were a crook, I   
   would know to look under the fender of your car for a keyswitch. Then   
   take a sharp chisel and hammer and shear the switch off, then cut the   
   wires to the switch, then get on with business as usual.   
   Sometimes the best intrusion device is to catch the crook offguard.   
   I kinda like the string tied to the toe suggestion. Ive heard it works   
   for napping while fishing too.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)