Introduction: Fire Alarm Circuit Using 555 Ic

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Hii friend,

Today I am going to make a fire alarm circuit using 555 timer IC.This circuit is very easy to make fire alarm circuit.

Let's get started,

Step 1: Take All Components As Shown Below

Components required -

(1.) Buzzer x1

(2.) Battery clipper x1

(3.) IC - 555 x1

(4.) Copper wire

(5.) Battery - 9V

(6.) Match box (for fire)

Step 2: 555 Ic Pinouts

This picture show the pinouts of timer ic 555.

Step 3: Connect Buzzer

firstly we have to connect buzzer.

Connect +ve pin of buzzer to pin-3 of 555 ic and

Connect -ve pin of buzzer to pin-1 of ic.

Step 4: Make Spring of Copper Wire

Next we have to make spring of copper wire as shown in the picture.

Step 5: Solder Copper Wire

Next connect copper wire to pin-2 of the ic.

Step 6: Connect Pin-4 and Pin-8

Next connect pin-4 and pin-8 of the ic as solder in the picture.

And also connect a wire on pin-6.

Step 7: Solder Battery Clipper Wire

Now connect battery clipper wire.

Connect +ve of battery clipper to pin-8 and -ve of battery clipper to pin-1 of the ic as you can see in the picture.


Connect battery to the Battery clipper and burn fire near the copper wire as shown in the picture.

NOTE : Touch on the pin-6 of IC to turn off the sound.

Thank you