This is the circuit of a simple Fire Sensor that uses an ordinary Signal Diode as heat sensor. As soon as the temperature near the diode rises above the preset value, alarm will be generated to indicate high temperature. Alarm will automatically turns off after 2 minutes.

Circuit in Word Format



About D.Mohankumar

D. Mohan Kumar M.Sc., M.Phil, is an Associate Professor from Trivandrum, Kerala, India. He has been guiding Post Graduate students in Animal Science research for the last 25 years in several premier institutions in Kerala, India. He is an avid electronics enthusiast and has been designing circuits for the past 20 years. In this period he has supported many electronics/electrical engineering students in their final year projects. He is a regular contributor to Electronics For You magazine which is South Asia’s largest circulating electronics magazine published from New Delhi. He is also contributing articles in http://www.elprocus.com and http://www.engineersgarage.com/
This entry was posted in 555 Timer, Alarms, Circuits, Detectors, Hobby Circuits, Indicators, School Projects and tagged , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s