How to make a alarm car security system?

[Paul Saha]

I tried to search over the internet, but I was unable to find it. Can you help me finding the circuit diagram of an alarm car security system that we normally see operated by a car key...which has lock and unlock option?
What is the mechanism?

 

[shrtrnd]

The lock is called a 'key-switch'.
You'll have to keep Googleing for a schematic that you think you want for your application.

 

[Paul Saha]

The lock is called a 'key-switch'.
You'll have to keep Googleing for a schematic that you think you want for your application.

No I am not talking about 'key-switch'. I might be talking about 'smart-key'. The lock is controlled remotely, and when ever someone touches the lock, it starts making sounds.