Speaker for my Alarm

[machavelli]

i am making a visual zone alarm (led's come on when ever a door or window opens) for my house and i want to hook it up so it makes 1 beep or chirp whenever one of the lights come on. any help would be great.

 

[kinjalgp]

Use Piezo-Buzzer for your alarm along with a 555 monostable circuit so that it will beep once whenever triggered.