Fire alarm project presentation, using NE555 IC, Thermistor. Inside- Circuit Diagram Implementation Why Fire Alarm etc.

1. Welcome
to our presentation

2. A Presentation on…
Fire Alarm Using Thermistor
Prepared by
Khandaker Faisal, Student ID: 132001
Faqrul Islam, Student ID: 132003
Md. Lotifur Rahman, Student ID: 132016
Farzana Yeasmin, Student ID: 132019
Department of Electrical and Electronic Engineering
Dhaka University of Engineering & Technology, Gazipur.

3. Contents Outline
 Why Fire Alarm?
 Fire Alarm Circuit Implementation.
 Conclusion.

4.  Why Fire Alarm?
 In Bangladesh many accident occurred
due to fire. As a result there are many
people died by fire in every year.
 If there would have fire alarm system,
then it could be possible to save their life.
 So, why not the fire alarm system in
“garments”, “houses”, “industries” etc?!

5.  Fire Alarm Circuit Implementation.
 Here Thermistor works as a heat sensor. When temperature
increases, its resistance decreases, and vice versa.
 Timer IC NE555 is wired as an astable multivibrator
oscillating in audio frequency. The output of timer IC is
connected with the buzzer.
 The circuit works with a 6V-12V regulated power supply.
 Here we used a voltage regulator IC (7805).

6.  Conclusion
This type of fire alarm circuit is very easy to implement. Also
its apparatus are low at cost and available. Circuit response is
good. We can use it where can catch fire. It helps the victim
to take safe place.