This article is a continuation of the series on “Embedded Sensor – ADXL345” and carries the discussion on Size, Functional Diagram, Pin Configuration, Application, Features and Benefits, ADXL345 Interface accelerometer, and Projects with this accelerometer. This sensor from Analog Devices
Digital output data is formatted as 16-bit twos complement and is accessible through either an SPI (3- or 4-wire) or I2C digital interface.
A smoke sensor is a device that senses smoke, typically as an indicator of fire. Commercial and residential security devices issue a signal to a fire alarm control panel as part of a fire alarm system , while household detectors, known as alarms, generally issue a local audible or visual alarm from the detector itself. The Analog Smoke/LPG/CO G as Sensor (MQ2) module utilizes an MQ -2 as the sensitive component and has a protection resistor and an adjustable resistor on board. The MQ-2 gas sensor is sensitive to LPG, i-butane, propane, methane, alcohol,Hydrogen and . It could be used in gas leakage detecting equipments in family and industry. The resistance of the sensitive component changes as the concentration of the target gas changes.
Smoke sensors, also known as smoke detectors or smoke alarms, are devices designed to detect the presence of smoke or combustion products in the air. These sensors are crucial components of fire detection and safety systems, alerting occupants of potential fire hazards in residential, commercial, and industrial settings.
There are several types of smoke sensors, including ionization smoke detectors, photoelectric smoke detectors, and combination smoke detectors. Ionization smoke detectors use a small amount of radioactive material to ionize the air between two electrically charged plates. When smoke enters the chamber, it disrupts the ionization process, triggering the alarm. Photoelectric smoke detectors, on the other hand, use a light source and a photosensitive receiver. When smoke particles enter the chamber, they scatter the light, which triggers the alarm. Combination smoke detectors combine ionization and photoelectric technologies for enhanced fire detection capabilities.
Overall, smoke sensors play a critical role in fire prevention and safety, providing early detection of smoke and potentially saving lives and property.
