What is Diode ? | which type diode use in mobile

What Is Diode ?

The diode is composed of p and n type two semiconductors, these two semiconductors are melted together. This diode is mainly the p-n treaty. On which the metallic contact is connected to the end so that the current can be given the external voltage. In one area, there is excess of receptive receptacles and greater area of ​​donor insults in other areas. The semiconductor is made by mixing upward atomic arsenic, antimony, with 5 connective crystals of germanium or silon elements. The diode works in the forward base or can pass the stream in only one direction

Terminal positive of p side of the image and terminal of n side is negative.

Identity of diode in Mobile PCB: -

This is seen in the black color of PCB, and a side edge is a white color strip. And one lag bigger and the second lag is smaller

Work Of Doide

The main function of the diode is to convert AC voltage to DC voltage. It is used for mobile protection in parlor, and for changing the waste of ac in the series to dc.

Types of diode: - Diode mainly There are four types. 

p-n junction diode:- 

This is the form of p-n treaty. On the one side, a white color strip is formed, which is the negative (N) terminal of the diode and the side of the black side is a positive terminal.

Zenor diode:- 

This is a type of semiconductor diode. Whose name is named after his inventor C. Zenor. This diode is the value of a fix voltage (4.24.8,6.2 6.8). The voltage value of which will be the same voltage in its output. It is used as a voltage controller.

circuit symbol 

 LED (light emitting diode):- 

This is a highly degraded p-n treaty diode. Which automatically radiates radiations in the foreground bias. This diode closes in a transparent shell so that the emitted   

  

Symbol:-

Diode Testing By Multimeter 

Set multimeter to beep mode.       

After that both of the multimeter's probes touch the two ends of the diode, more than 250 rides on one side.

And no other readings come from the other side

Then the diode is considered correct.   

In the diode there is a positive and negative terminal, so while keeping the test, keep the multimeter probe in mind, which tells the terminal of the diode. On both sides of the diode, if the direction of the multimeter is placed on both probes, then the red probe is terminal positive. Why is the voltage of 1.5 volt in multimeter flowed from positive to negative.