Home Security (Wireless)

Home Home Security (Wireless)


Home security

Home security is both the security hardware in place on a property as well as personal security practices. Security hardware includes doors, locks, alarm systems, lighting, motion detectors, security camera systems, etc. that are installed on a property; personal security involves practices such as ensuring doors are locked, alarms activated, windows closed, extra keys not hidden outside, etc.

According to an FBI report, 58.3 percent of burglaries in the United States involved forcible entry. Per the most recent statistics, the average burglary in the United States lasts for about 90 seconds to 12 minutes and, on average, a burglar will break into a home within 60 seconds.[1][2] Most thefts target cash first followed by jewels, drugs, and electronics.


 Door Sensor

 door contact sensor is a peripheral security sensor that lets an alarm system know whether a door is opened or closed. When a door is opened, the sensor will activate and let the system know about the situation. The system will then respond based on the programming settings for that zone. Most door contacts operate in a relatively similar manner. They usually consist of two parts – a sensor and a magnet. The sensor is considered more valuable, and certain measures are taken to protect it from damage. This is why the sensor is usually placed on the stationary frame of the door so that it does not move with regular use. The magnet is less valuable, and it can be more easily replaced. It is placed on the moving portion of the door itself. For proper operation the magnet will usually need to be within a half-inch, 

 Infrared Sensor

 An infrared (IR) sensor is an electronic device that measures and detects infrared radiation in its surrounding environment. Infrared radiation was accidentally discovered by an astronomer named William Herchel in 1800. While measuring the temperature of each color of light (separated by a prism), he noticed that the temperature just beyond the red light was highest. IR is invisible to the human eye, as its wavelength is longer than that of visible light (though it is still on the same electromagnetic spectrum). Anything that emits heat (everything that has a temperature above around five degrees Kelvin) gives off infrared radiation.

Gas Sensor

A gas sensor is a device which detects the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage. Based on this voltage value the type and concentration of the gas can be estimated.
Gas detectors can be used to detect combustible, flammable and toxic gases, and oxygen depletion. This type of device is used widely in industry and can be found in locations, such as on oil rigs, to monitor manufacture processes and emerging technologies such as photovoltaic. They may be used in firefighting.

Fire Sensor

The Matrix-Fire_Sensor module is a flame detector module. It uses the YS-17 flame detector to detect flames or fires. It can detect flames or fires whose wavelengths are between 760nm and 1100nm. Its detecting angle is up to 60 degrees. Its sensitivity can be adjusted via the potentiometer. This fire sensor circuit exploits the temperature sensing property of an ordinary signal diode IN 34 to detect heat from fire. At the moment it senses heat, a loud alarm simulating that of Fire brigade will be produced. The circuit is too sensitive and can detect a rise in temperature of 10 degree or more in its vicinity. Ordinary signal diodes like IN 34 and OA 71 exhibits this property and the internal resistance of these devices will decrease when temperature rises.


A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. There are two general types: pneumatic and electronic. Many fire sirens (used for calling the volunteer fire fighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next to the fire station. Fire sirens can also be mounted on or near government buildings, on tall structures such as water towers, as well as in systems where several sirens are distributed around a town for better sound coverage.


doorbell is a signaling device typically placed near a door to a building’s entrance. When a visitor presses a button the bell rings inside the building, alerting the occupant to the presence of the visitor. Although the first doorbells were mechanical.
As with wireless doorbells, musical doorbells have also become more common. Musical and continuous power doorbells serve as an attempt to bridge the gap between newer digital circuitry and older doorbell wiring schemes. A major difference between the standard setup of a wired doorbell and a musical doorbell is that the musical doorbell must maintain power after the doorbell button is released to continue playing the doorbell song. This can be achieved in one of two ways.


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