A fire alarm system detects smoke, fire, or water flow using devices like smoke detectors, heat detectors, and manual pull stations. When activated, these devices alert people through visual and audio appliances like LED bulbs and speakers. The circuit diagram shows how a basic fire alarm works using a battery, starter, bulb, speaker, and resistance to power the system and create alerts upon heat detection via a tube light starter that closes the circuit when heated.

1. ELECTRONIC
PROJECT
PRESENTATION
ON
FIRE ALARM

2. WHAT IS FIRE ALARM ??
A fire alarm system is number of devices
working together to detect and alert people
through visual and audio appliances
when smoke fire is present. These alarms may
be activated from smoke detectors heat
detectors, water flow systems, which are
automatic or from a manual fire alarm pull
station.

3. CIRCUIT DIAGRAM OF FIRE ALARM
CIRCUIT

4.  3-VOLT BATTERY
STARTER
BULB (LED)
 MINI SPEAKER OR BUZZER
 RESISTANCE

5.  9- VOLT BATTERY IS ENOUGH TO OPERATE THIS
CIRCUIT
 The RESISTANCE is connected in sires to safe tahe buld
and buzzer from battrey.
A bulb (led) is connected in series to alarm the people who
deaf or can not hear speaker audio.
A buzzer speaker is connected in series to alarm though the
audio.
 For heat sensor we have used tube light starter in place of
manual switch. In a starter there is a metal plate and a pin with
small gap. When starter gets heated then metal plate of starter
expands and get in contact with the pin and circuit is
completed and we get audio from speaker.