555 BASED FIRE ALARM + EXTINGUISHER PROJECT

Problem statement:Auto fire alarm + extinguisher circuit capable of operating as a stand alone system in cases of emergency fire outbreaks.

Functionality:
The circuit operates by making use of a single 555 timer as the main controller.A smoke detector is used as the circuit sensor which generates a 5V output upon detection of smoke.The voltage output is fed onto the BC547 base pin which triggers the transistor and drives it into saturation causing to produce a 12V signal on the collector terminal.The signal is supplied onto the 555 timer input terminal which triggers the internal comparators resulting in the output pin number 3 producing a 12V output that drives the LED,BUZZER and pump represented by the DC motor.
When The outputs are activated upon fire detection,an alarm is sent both visually and in the form form of sound through the led and the buzzer respectively.The LED is mostly utilized by those people within vicinity of the site of the detector whilst the buzzer alerts those people out of vicinity of the detector site.The buzzer also alerts other people outside the building or site of the fire outbreak making it easier for help to be accessed quickly.

Justification:The circuit makes use of very cheap and locally available components making it easier to construct and produce in mass quantities so that it becomes affordable to a large target group of consumers.Also,the circuit is less complicated since it makes use of non-programmable ICs.Socially the components used are environmentally friendly since there are no toxic discharges or emissions from the processes involved in the circuit functionality.

conclusion:For more detailed information email:aidgambinya@gmail.com/ visit the youtube channel:https://www.youtube.com/watch?v=Fn2GhdSpTJY