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Alarm - With Infrared Remote 2011-06-17

I built this circuit recently and decided to do a rough schematic and post it here.It is a car alarm.You need to mount the sensor and led where they are visible from a window .I made the transmitter out of smt parts and mounted it in a keychain led flashlight.when you turn it on the led comes on and it waits for a signal from the sensors .If it gets a signal from a sensor it turns on a relay which I'm connecting to my horn.You have to have line of sight and be pretty close to control it .

Could anyone suggest some sensors?

I made my own vibration sensor.
I took a piece of a retractable radio antenna and hooked it to one lead.
I hooked the other lead to a nail hung in the center of the antenna tube.
then I hung the whole thing so that if you park on a hill it will lean .
Sort of a wind chime crossed with a bell.
I had to use really fine motor wire with thread to support the weight.
What would be awesome is If the whole vehicle body was made into a proximity sensor.

Here is the ROUGH drawing of the schematics and the .asm files.

And thanks to Nigel for showing me how to do the infrared stuff :)
There are some connections not showing such as power and a 5v regulator but you get the idea. Don't forget when you build the transmitter the button cells have a positive shell . I assumed it was negative now I'm trying to get them in backwards.
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