Digital electronics is branch of electronics which deals with digital signals to accomplish the tasks. The digital signals are the signals which are represented using the binary language, i.e., 0’s and 1’s.The digital circuits are implemented using logic gates like AND, OR, NOT, NAND, NOR, XOR and XNOR which can perform logical operations.Digital Circuit DefinitionA circuit implemented using a number of logic gate and takes the input in the binary form (0’s and 1’s) is called as Digital Circuit.Types of Digital CircuitsCombinational Digital CircuitsSequential Digital CircuitsDigital Logic GatesA logic gate is an electronic component that is implemented using a Boolean ... Read More

A diac is a two-terminal, three-layer, bidirectional device which can be switched from OFF state to ON state for both positive and negative polarity of the supply voltage.Constructional Details of the DiacThe basic structure of a Diac is similar to a BJT transistor. The only difference is that there is no base terminal in case of Diac.The terminals of the diac are taken from the two p-regions of silicon that are separated by an n-region. The concentrations are identical in all layers to give the device symmetrical properties.V – Characteristics of DiacFrom I-V Characteristics of a Diac, for the applied ... Read More

In practice, a rectifier is used to produce pure DC supply in electronic circuits. But the output of a rectifier is not pure DC, it has pulsations, i.e., it contains AC and DC components. The AC component is undesirable and must be removed. For this, a filter circuit is used."A Filter Circuit is a circuit which removes the ac component from the output of rectifier and produces the pure dc output across the load."The filter circuit should be placed between the rectifier and the load.A filter circuit is basically a combination capacitors (C) and inductors (L). A capacitor allows the ... Read More

A Bipolar Junction Transistor (BJT) is a three-terminal device which consists of two pn-junctions formed by sandwiching either p-type or n-type semiconductor material between a pair of opposite type semiconductors.The primary function of BJT is to increase the strength of a weak signal, i.e., it acts as an amplifier. A BJT can also be used as a solid state switch in electronic circuits.Types of BJTThere are two types of BJTs −NPN TransistorPNP TransistorIn this article, we will discuss in detail the working principle of both these types of BJTs.NPN TransistorAn npn-transistor is composed of two n-type semiconductor materials which are ... Read More

Half Wave Rectifier is a diode circuit which is used to transform Alternating Voltage (AC Supply) to Direct Voltage (DC Supply). A single diode is used in the HWR circuit for the transformation of AC to DC. Half Wave Rectifier circuit allows the one – half cycle of the AC Supply waveform to pass and blocks the other half cycle. Half Wave Rectifier Circuit Diagram The circuit of HWR consists of following three main components − A Diode A Transformer A Load (may be a Resistance) Working of HWR Circuit Positive ... Read More

In this post, we will understand the difference between DLP and LCD projector −DLP Projector (Digital Light Processing)It is a type of projector that uses a digital micro mirror device.One of the chip has a reflective surface that contains thousands of tiny mirrors that are coordinated with a light source.This helps reflect the digital imagery on to any surface.It provides smooth video.The pixels are less visible.It is more film-like, as on HDTV.It shows the rainbow effect.The intensity of black is amazing.It is portable since it is small and light in weight.The light source could be a standard lamp or an ... Read More

Computers have become an integral part of our day-to-day life. We cannot imagine our lives without computers. We use computers for almost all our daily activities. At present, everyone is familiar with digital computers like smartphones, digital watches, laptops, desktop PCs, etc. But there is another variant of computers called analog computer. Analog computers are the earlier variants of computer that are less frequently used these days or used in some specialized applications only. Read through this article to find out more about analog and digital computers and how they are different from each other. What is an ... Read More

The elementary foundation of both calculator and computer is the same because both these were developed to solve problems associated with complex calculations. At a basic level, we can state that a computer is an extended version of a calculator. A calculator can perform mathematical operations only, whereas a computer can perform various tasks like arithmetic operations, logical operations, sorting, inserting, comparison of different types of data and information and many more. In this article, we will discuss all the major differences between calculator and computer. Let's start with some basics of calculator and computer so that it will ... Read More

An attachment to an electronic document that can be viewed as a signature is referred to as a digital signature. It is used to prevent the unauthorized alterations in a document. Thus, a digital signature is created for encrypting the document. On the other hand, the medium which is provided to validate the identity of a user for an electronic transaction is referred to as a digital certificate. Digital certificates are used to provide protection against unauthorized data exchange from user to websites. The most basic difference between a digital signature and a digital certificate is that a digital signature ... Read More

In practice, a lot of people use the terms digital signature and electronic signature interchangeably. Although a digital signature is a type of electronic signature, but they are not exactly the same. The most basic difference between a digital signature and an electronic signature is that a digital signature is used to secure a document, whereas an electronic signature is used to verify a document. Read this article to find out more about digital signatures and electronic signatures and how they are different from each other. What is a Digital Signature? A digital signature is a type of electronic signature ... Read More