I search after electronics project that explain exactly how to build an alarm ​

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You forgot to explain what kind of alarm (burglar, water leaking, fire, carbon monoxide, etc).

 

thanks
burglar

 

what specification are you after?

does it need to have door sensors? PIR? more info.

 

The component (or the way) in this project is less important​

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The important is that I search after book project that explain how to build an alarm for burglar​

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And have a drew of the electronic circuit and the code​

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Hello,

There is no need to kick the topic.
Here is a page with several circuits:
http://uk.geocities.com/ronj_1217/circ.html

Again found in the EDUCYPEDIA:
http://www.educypedia.be/electronics/circuitssensors.htm

Greetings,
Bertus

 

thanks
burglar

the main device is motion detector (sensor)