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.
Alarm - With Infrared Remote
I built this circuit recently and decided to do a rough schematic and post it here.It is a car alar