Fire Alarm

This is a simple circuit and it can be made easily.You can use starters using in tube lights.It can be easily collect from a electric shop.To adjust the sensor you want to brake up the cover of the starter and the glass without effecting the inner metal sheet.please adjust the metal sheet close.Wire the circuit.Put the battery,place the sensor towards the fire,you can hear a music from the speaker

Component List :-

1) 3 Volt Power Source

2) Speaker

3) Transistor 548B, 558B

4) Resistance 220K ohms, 10K ohms

5) Capacitor 0.01 Mfd
Original image 

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