The RS232 connector is a connector type 9-pin connector is popularly called Series. It is a connector that was once widely used by various components of the PC, such as a mouse, keyboard ... but over time it has fallen into disuse and replaced by the USB connector trying to emulate the latest version number. It is currently used by robots, elevators, POS and industrial machinery.

The term refers generally to control the amount of flash light emitted by the measuring light when returning to the same flash sensor through the lens. In TTL flash metering it occurs after the shutter has opened -the sensors record the amount of light created flash back to the camera through the lens and flash ( turns off automatically "cooling" ) when you haveproduced an adequate amount of light.

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.

RS-232 (Recommended Standard 232, also known as EIA/TIA RS-232C) is an interface that designates a standard for the exchange of a series of binary data between a DTE (Data Terminal Equipment) and DCE (Data Communication Equipment , Data Communication Equipment), although there are others in which the RS-232 interface is also used. An equivalent definition published by the ITU is called V.24. The RS-232 is a connectorDB-25 type (25-pin), although it is normal to find the version of 9-pin (DE-9, or popularly also called DB-9), cheaper and even extended to certain types of peripherals (such as serial mouse PC).