XPost: alt.autos.toyota, rec.autos.tech, alt.autos.honda   
   From: Mav@ericks.com   
      
   a viper.. not the car alarm, but a real life viper...   
      
      
      
   "Hachiroku ????"  wrote in message   
   news:P2sxi.1330$563.924@trndny08...   
   > And come up with a Cheap-Ass alarm.   
   >   
   > On the Mazda, I don't want to go to the trouble or expense of installing a   
   > real alarm, but I want something.   
   >   
   > Honking the horn and flashing the flashers would be good enough. I want   
   > the horn to 'beep', so a flasher unit and a relay or two would be good.   
   >   
   > There's two ways to set the thing up:   
   >   
   > Put something like a key switch under the fender, turn on when leaving,   
   > turn off when using the car.   
   >   
   > 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.   
   >   
   > But, I need a hint what size cap to use, and how to wire it into the relay   
   > so that it charges before setting off the horn, maybe 20 seconds is good.   
   >   
   > Of course, we could get REAL sophisticated and use the ol' venerable 555   
   > timer, but that's more involved than I want to make it.   
   >   
   > Any ideas?   
   >   
   >   
      
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