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Fire Alarm
Manish Choudhary
Course Plan
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Highlight Importance of Fire Safety
Instructions to Set Up Fire Alarm
Ask Students to Assemble
Demonstration of Fire Alarm
2nd - 3rd Nov. 2010
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Electronic Circuit Diagram - 1
http://www.circuitstoday.com/low-cost-fire-alarm-circuit
2nd - 3rd Nov. 2010
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Parts – Electronic Circuit
 Transistor BC177
 Transistor BC108
 Transistor AC128
 Capacitor (100 µF)
 Capacitor (2.2 µF)
 Resistor (470 KΩ)
 Resistor (100 K Ω)
 Resistor (1 K Ω)
2nd - 3rd Nov. 2010
 Diode IN4007
 Battery – 9V
 Buzzer – 1
 Bulb – 1
 Wire
 Soldering Rod
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Simple Circuit - 1
Wax
Copper Plates
Nails
Bulb
Wooden Board
Buzzer
Battery
2nd - 3rd Nov. 2010
Heat melts wax which
connects the circuit
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Simple Circuit - 2
Copper Plates
Nails
Bulb
Wooden Board
Buzzer
Battery
2nd - 3rd Nov. 2010
Heat causes metal
expansion which
connects the circuit
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