UTP cable is standard twisted pair is referred by its acronym UTP (Unshiedld Twiested Pair/Unshielded Twisted Pair). The major advantages of this cable are its low cost and ease of handling. Its main disadvantages are a higher error rate compared to other cable types and their limitations to work at high distances without regeneration. FTP is a type of cable caracteriza that each twisted pair is uniformly during creation. A comprehensive screening of all pairs is performed by a apantallante outer sheet. This technique allows to have similar characteristics to the shielded cable. STP is characterized by that each pair is covered with a metal mesh, in the same way that the coaxial cables, and the set of pairs is coated with a sheet apantallante. Referenced frequently with their acronym STP (Shield Twisted Pair/Shielded Twisted Pair)

The lux (symbol lx) is the derivative unit of the International System of Units for the illuminance or lighting level. Equal to one lumen/m². It is used in photometry as a measure of luminance, taking into account the different wavelengths by the luminosity function, a standard model of the light sensitivity of the human eye.

Closed circuit television, or CCTV (stands for closed circuit television) surveillance is a technology designed to monitor a variety of environments and activities. It is called closed, that, contrary to what happens with the media, all components are linked. In addition, unlike conventional television, this is a security system designed to

An Active Pixel Sensor (APS) is a sensor that detects light based on CMOS technology and therefore known as CMOS sensor. Because CMOS technology is possible to integrate more functions on a sensor chip, such as brightness control, contrast correction, or an analog-digital converter. Advantages

Much lower power consumption

Economic (requires few external components)

If readingtaneous higher number of pixels

The digital converter may be integrated on the same chip

Blooming low ("Smear") or no

Greater flexibility in reading (faster preview, video, ...)

The pixels can be exposed and read simultaneously

Other possible topologies (the SuperCCD Fujifilm sensor employs a panel-shaped construction (octagonal) forpixels)

Different types of pixels (depending on size and sensitivity) combined

High frame rate compared to a CCD of the same size

In the diagram we can see: 1) photo-diode. 2) Amplifier. 3) metal wire. 4) Output signal. 5) Light.