How to Guide

This category cover topics of electronics “How to Guide”. Basic theory of electronics and question answer with how tech works with easy way with example. it also cover electrical fundamental like current, voltage and its calculation, some circuit design, device use and benefits etc.

How does a PTC relay with capacitor work?

PTC relay A PTC relay means positive temperature coefficient is a starting device for refrigerator compressors. It is responsible for providing power to the start winding for a brief moment to help start the cooling compressor motor. How a Refrigerator PTC…

What is the difference between MOSFET and HEMT?

In this topics we will understand what is difference between MOSFET and HEMT? Defination and use of Mosfet Mosfet (metal-oxide semiconductor field-effect transistor, pronounced maws-feht) is a special type of field-effect transistor (fet) that works by electronically varying the channel width…

What is pinch voltage?

When the gate voltage (-vgs) is made more negative, the channel width decreases until no more current flows between channels and the source is said to be pinched (similar to cut-offregion for bjt). the voltage at which the drain closes…

How does AC work? Does this mean the electrons swing back and forth along the wire at the frequency of the current flowing?

The ac current does not flow in the same direction. electrons in the wire (and other components) simply move back and forth. You know a joke where everyone is lining up for a photo? Instead of moving the camera to…

How does the diode work?

When we talk about electrical and electronic circuits, we use the old convention, called the conventional current flow (from positive to negative). To get rid of any idea of ​​thinking about “electrons,” we say “electricity flows from positive to negative.”…

Why zener diode is used?

Zener diodes are widely used as voltage references and as shunt controllers to adjust voltage across small circuits. When connected in parallel with a variable voltage source so it is inverse, a Zener diode leads when the voltage reaches the…

What is the replacement scheme used in ac voltage regulator using TRIAC? How?

 replacement scheme used in ac voltage regulator using TRIAC. An ac voltage controller is used to vary the rms value of the alternating voltage applied to the load circuit by inserting the thyristor between the load and the constant voltage…

Relationship of Voltage, Current, and Resistance

Relationship of Voltage, Current, and Resistance All circuits are a combination of three electrical properties: voltage, current and Resistance. Voltage is defined as the force that causes free electrons to move in a Conductor. Current can be defined as a…

Effects of Current Flow

The current flow has four effects that are used in different ways: magnetism, heat, chemistry Action and physical shock. Magnetism When current flows in a conductor, it creates a magnetic field around it Conductor. Most manufactured magnets are manufactured according…

How do photodiode arrays work?

Working of photodiode How does photodiode work : A photodiode array (PDA) is a linear range of discrete photodiodes on an integrated circuit (IC). For spectroscopy it is placed at the image level of a spectrometer to allow simultaneous detection…

How transistor can be used as a switch?

With a zero signal applied to the base of the transistor, it rotates “OFF” by acting as an open switch and zero collector current. The easiest way to change moderate to big power is to use the transistor with an…

How do NPN transistors work?

The standard bipolar or BJT transistor is presented in two basic forms. An NPN type (Negative-Positive-Negative) and a PNP type (Positive-Negative-Positive). The most commonly used transistor configuration is the NPN transistor. We have also learned that the bipolar transistor junctions…

How can you tell if a transistor is NPN or PNP?

Using the method for publication of NPN from PNP. If you have a transistor but you do not know if it is NPN or PNP, then you can find out what is the use of Ohm-meter if you know which…