What is the usese of electronics?

Answer 1

Transistor Applications

Transistors have a multitude of applications, among which are:

Amplification of all kinds ( radio , television , instrumentation )

Signal generation (oscillators, wave generators , radio frequency emission)

Switching, acting switches (relay control, supplies power switched, control lamps, modulation pulse width PWM)

Detection of light radiation (phototransistors)

Junction transistors (one of the most basic types) have 3 terminals called Base, Collector and Emitter , which depending on the encapsulation of the transistor can be distributed in various ways.

Transistor Encapsulation

Now we are going to see the transistors from the outside. They are encapsulated in different shapes and sizes, depending on the function they are going to perform. There are several standard packages and each package has a terminal assignment that can be found in a general catalog of transistors.

Regardless of the capsule they have, all transistors have their data printed on their body , that is, the reference that indicates the transistor model . For example, the transistors shown on the right have the reference "MC 140".

TO-3 capsule . It is used for high- power transistors , which always have an aluminum radiator that helps dissipate the power generated in it.On the top left we see its distribution of terminals, noting that the collector is the chassis of the transistor. Note that the other terminals are not the same distance from the two holes.

On the right we see how to place it on a radiator, with its screws and the insulating mica. The function of mica is that of an electrical insulator and at the same time a thermal conductor.

TO-220 capsule . It is used for transistors of less power, for voltage regulators in power supplies and for low power thyristors and triacs. Generally they need an aluminum radiator, although sometimes it is not necessary, if the power they are going to dissipate is low.

Below we see how to place the radiator and the fixing screw. An insulating mica is usually placed between the transistor and the radiator, as well as a plastic spacer for the screw, since the metal part is connected to the central terminal and sometimes it does not interest that it comes into electrical contact with the radiator.

TO-126 capsule . It is used in low power transistors, which generally do not need a radiator. At the top left we see the terminal assignment of a BJT transistor and a Thyristor. Below we see two transistors that have this capsule placed on small aluminum radiators and fixed with their corresponding screw.

TO-92 capsule . It is widely used in small signal transistors. In the center we see the terminal assignments in some models of transistors, seen from below. Below we see two such transistors mounted on a printed circuit board. Note the indication "TR5" on the silkscreen , which indicates that transistor number 5 of the circuit is mounted in that place, according to the electronic diagram.

TO-18 capsule . It is used in small signal transistors. Its body is formed by a metal casing that has a protrusion that indicates the terminal of the Emitter

Miniature capsule . It is used in small signal transistors. Like the previous one, they are quite small in size.

Answer 2

There are several uses of electronics tools and devices in our general life some examples i am giving below.

1> electronic tools

for measuring current and voltage and other parameter.

for measuring or detecting non electrical quantity radiation etc.

for removing error from the defective electronic device.

2> Devices

Electronics devices are used for amplification.

data communication.

and medical equipment or machine control system so much

Answer 3

given to small electrical energy, its work and given to very lorggest output

(exm: electronics control systems)

by

smailan

Answer 4

COMMUNICATION RADAR COMPUTING INSTRUMENTATION ENVIRONMENT

Answer 5

a electronics are radio telephones cell phones and televisions