555 Overheat Detector Alarm Switch
The overhead detector circuit is designed to monitor ambient temperature levels for fire detection purposes. The core component of this circuit is the LM35 temperature sensor, which is known for its high accuracy and linearity in temperature measurement. The LM35 outputs a voltage that is directly proportional to the Celsius temperature, making it suitable for applications where precise temperature readings are critical.
In the schematic, the LM35 is connected to a power supply, typically ranging from +4V to +30V, allowing it to operate efficiently in various environments. The output pin of the LM35 is connected to an analog-to-digital converter (ADC) or a comparator circuit. This setup enables the system to convert the analog voltage output of the LM35 into a digital signal or to compare it against a predefined threshold voltage that corresponds to a specific temperature, indicating a potential fire hazard.
Additional components may include resistors for voltage division, capacitors for noise filtering, and possibly a microcontroller to process the temperature data and trigger an alarm or notification system. The circuit may also incorporate a relay or a solid-state switch to activate external alarms or fire suppression systems when the temperature exceeds a predetermined threshold.
This overhead detector circuit is essential for early fire detection, providing timely alerts to prevent potential disasters. Proper calibration and placement of the LM35 sensor are critical to ensure accurate readings and reliable operation in real-world applications.overhead detector (fire alarm) circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and .. 🔗 External reference
Related Circuits
The following circuit illustrates a Light Barrier Sensor Detector Circuit Diagram. Features include a single transistor, an adjustable potentiometer, and a 6V power supply. The Light Barrier Sensor Detector Circuit is designed to detect the presence of an object by...
This circuit employs a 1458 dual op-amp to create a radar detector. C1 acts as the radar signal detector. The first op-amp functions as a current-to-voltage converter, while the second op-amp buffers the output to drive the piezo transducer....
This musical light alarm circuit is very simple and uses only seven components, including a light-dependent resistor (LDR) and a 3.6V battery or three 1.2V rechargeable batteries. The well-known UM66 is utilized as the sound generator, providing a pleasant...
The alarm is set by opening Sw1. It can be any small 1-amp single-pole change-over switch - but for added security, you could use a key-switch. Once Sw1 is opened, you have about 10 to 15 seconds to get...
The schematic illustrates the design of a circuit that measures the resistance of the skin and transforms it into a functional switching signal. This circuit typically employs a resistive sensor, often referred to as a skin resistance sensor or galvanic...
This is a simple but effective alarm circuit that can reset itself after a user-defined time. It features normally open and normally closed triggers, enhancing its practicality. The circuit utilizes a 555 timer, allowing the alarm to automatically reset...