Like a linear power supply , the SMPS too converts unregulated ac or dc input voltage to a regulated dc output voltage. The input voltage is first rectified  and filtered using a capacitor at the rectifier output. The high frequency transformer used in a SMPS.



Adapters for battery-powered equipment may be described as chargers or rechargers Use of an external power supply allows portability of equipment powered either by mains or battery without the added bulk of internal power components, and makes it unnecessary to produce equipment for use only with a specified power source.                                                    




The BNC (Bayonet Neill–Concelman) connector is a miniature quick connect/disconnect radio frequency connector used for coaxial cable. It features two bayonet lugs on the female connector; mating is fully achieved with a quarter turn of the coupling nut. BNC connectors are used with miniature-to-subminiature coaxial cable in radio, television, and other radio-frequencyelectronic equipment, test instruments, and video signals.



 A DC connector (or DC plug, for one common type of connector) is an electrical connector for supplying direct current (DC) power.

Compared to domestic AC power plugs and sockets, DC connectors have many more standard types that are not interchangeable. The dimensions and arrangement of DC connectors can be chosen to prevent accidental interconnection of incompatible sources and loads. Types vary from small coaxial connectors used to power portable electronic devices from AC adapters, to connectors used for automotive accessories and for battery packs in portable equipment.


In an Unshielded twisted pair(UTP)  cable, conductors which form a single circuit are twisted around each other in order to cancel out electromagnetic interference (EMI) from external sources. Unshielded means no additional shielding like meshes or aluminum foil, which add bulk, are used.
UTP cables are often groups of twisted pairs grouped together with color coded insulators, the number of which depends on the purpose.


WIRE 3+1:

Sufficient length, Negligible resistance, Tough and tensile, Excellent coating, Well insulated, Long lasting, Budget friendly prices. These cables are made up of pure copper materials and hence are very efficient in carrying the current Video and Audio from one place to another without any loss in the voltage or current amplitude.