A fire alarm is actually a an electronic sounder or maybe a bell. The sounder constitutes a loud high pitched sound to alert individuals that there’s a fire in the building.Here the fire alarm systems senses the heat and activates the loud noise.

Now I’m going to instruct the way to create a fire alarm with fewer selection of elements.
Lets Get Started..
Step one: Components Required
Piezo buzzer – one [Banggood]

9V Snap and Battery – one [Banggood]

PCB -1 [Banggood]

Fluorescent light starter – one

You are able to buy elements and resources various other : [Banggood]
Step two: Circuiting First remove the situation of fluorescent light starter and then get rid of the capacitor form it.

Connect positive terminal of the electric battery to the positive terminal of piezo buzzer.

Negative pin of piezo buzzer goes to any only one of the pin of tube light starter.

Another pin of Starter goes to bad pin of the battery power.

Here circuiting is actually completed.

You are able to view the video below for more any clarifications of the circuiting.

Below in the circuit the starter acts as the switch. When the bulb is actually heated, it acts closed switch. When it cools it functions as open switch.
Step three: Circuit Construction and Testing