Mini Fire Alarm PROJECT BY ASRAR AHMAD MALLA (21MASP1002) SUBMITTED TO DR VINOD KUMAR Contents Introduction Components Diagrams Working Applications Advantages Disadvantages Future scope Introduction Fire Alarm Circuit is a simple circuit that detects the fire and activates the Siren Sound or Buzzer. Fire Alarm Circuits are very important devices to detect fire in the right time and prevent any damage to people or property. There are many expensive and sophisticated Fire Alarm Circuit in the form of stand-alone devices, but I have designed very simple Fire Alarm Circuits using common components Components Transistor 15D140 Transistor BC 547 Resistor 33K (pink) Resistor 15K (blue) Dise Capacitor Speaker Connecting wires Battery (cells) Pictures Working This circuit uses a thermistor to sense the temperature. When it senses that the temperature of the environment is increasing above a given threshold, then it gives a signal. The temperature at which the circuit detects fire. This circuit alerts us when there is a fire accident at home by ringing a siren sound. You might have seen fire alarms earlier but this is quite different as it generates a siren sound instead of a buzzer and also it uses basic components to generate that siren sound. Applications Home security system Schools College Lab Offices Industries and factories R&D cells All electrical departments Advantages Low cost Very efficient Portable Less complex circuitry Simple and efficient Disadvantages Requires continuously power supply Senses only when near to heat Not effective No longer use Future scope To Overcome disadvantages and looking for implementation of Automatic fire detector. In the place of thermometer which only detect heat we can use sensors. Use high technology speakers instead of ordinary buzzer. Thank You
