Simple Fire Alarm Circuit | Simple Fire Alarm Circuit Diagram

Simple Fire Alarm Circuit - Electronic Project

Introduction:

In modern society, it is impossible to imagine a house or building without a fire accident detector. Modern houses require a continuous installation of fire detectors. Not only in industry but also in the household. Take the case of a duplex that experiences a fire accident without a detector which means everything in that building will get burnt even human beings. But in a case where a fire alarm is installed, that means everyone in that building will be alerted and fire security bodies will also be informed for quick security action. The same thing can also happen to our power supply offices and industries. In order to notify residents of any building in the presence of a fire accident, a fire alarm system is used.

An automatic fire alarm project system is designed to detect the Circuit diagram's unwanted presence of fire by monitoring current environmental changes associated Currenttlou with combustion. In general, the power supply of a fire alarm project system is classified as either automatically and actuated, manually actuated, currently, or both. Automatic fire alarm project systems are intended to notify the building occupants to power supply evacuate in the event of a Circuit Diagram fire or another emergency, report the event to an off-premises Currenttlou location in order to summon emergency Circuit diagram services and prepare the structure and associated project systems to control the spread of fire and smoke.

A fire alarm project system has several devices working together to detect and warn people Currenttlou through visual and audio appliances when smoke, as fire, carbon monoxide, or other emergencies are power supply present. These alarms may be activated power supply automatically from smoke detectors, power supply, and heat detectors or may also be activated via project system manual fire alarm activation devices such as manual call points or pulsations. Alarms can be either Circuit diagram motorized bells or wall-mountable current sounders or horns. They can also be speaker power supply strobes that sound an alarm, a project system followed by a voice evacuation, and a message that warns people inside the Circuit Diagram building not to use the current elevators. Fire alarm sounders can be set to certain power supply frequencies and different tones including low, as medium, and high, depending on the country and manufacturer of the circuit diagram device.

Diagram of Simple Fire Alarm Circuit Diagram:

Components Needed for this Project:

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Working Principle of How to make simple fire alarm:

The Simple Fire Alarm Circuit Diagram works by using a transistor BC177 (Q1) as a fire Currenttlou sensor. When the temperature increases, project system the leakage voltage of this transistor also Project System increases. The circuit diagram is designed such that an increase in the power supply leakage of Q1 will trigger transistor Q2. When there is a Circuit diagram fire breakout, transistor Q2 will turn on, as turning on transistor Q3. Transistor Q3 drives a Circuit diagram relay, which can be used to activate a Currenttlou light, bell, or horn as an indication of a Project system fire. The diode D1 acts as a free-wheeling diode to protect the circuit diagram from the back EMF created when the Circuit diagram relay switches.

We can adjust the Preset R1 to the desired temperature level to set the Circuit diagram alarm. However, as this is not a latching alarm, meaning that the Curenttlou alarm will stop once the power supply temperature in the sensor’s area drops below the set point. Depending on your needs, the Circuit diagram load can be connected through the relay contacts’ C, NC, and NO points Circuit diagrams. The adjustment can be made using a power supply soldering iron and a Currenttlou thermometer. To do this, as switch on the power supply and keep the soldering iron tip near Q1 while keeping the thermometer near it. We can adjust the temperature to the power supply desired level by sealing R1.

In this fire alarm circuit diagram project, a thermistor works as the Currenttlou heat sensor. When the temperature power supply increases, its resistance decreases, currently, and vice versa. At normal circuit diagram temperature, the resistance of the project system thermistor (TH1) is approximately 10 kilo-ohms, currently reducing to a few ohms as the project system temperature increases beyond 100°C Circuit diagram. The circuit diagram uses readily available components and can be easily power supply constructed on any general-purpose project system PCB. Check out the fire sensor circuit.

The system is designed to quickly check any possible outbreak of fire. It is available in 2, 4, and 8-loop power supply forms. Invariably, project system you can monitor large premises using a single Circuit diagram panel. There is a looping of the wire and connection of the wire to the control panel at each point. All detectors, sounders, call points, and interface modules are joined to the loop. Each of the loops has an address of its own. The function of the Circuit diagram control panel is to communicate with each of the power supply loops. When a fault condition or alarm detects a fire, as it triggers the exact detector. The loop is powered at each end. If the loop breaks at any place, there is no loss of devices. Furthermore, circuit diagram isolators in the project system reduce the area of coverage lost when the power supply is short-circuiting.

In this circuit the IR receiver is a sensor and when it is connected to the base pin of the transistor the combination ( sensor and transistor ) acts as a switch. Fire contains infrared rays. These infrared rays when falling on the IR receiver conduct a small current from the positive terminal to the base. This small current to base allows the flow of current from collector to emitter. The flow of current through the transistor completes the circuit of the buzzer and LED and makes them beep/glow.