Theory- 34 :- UPS - Working Principle

UPS

Stands for "Uninterruptible Power Supply." In the technology world, UPS is more than just a brown shipping company. It is also a type of power supply that uses battery backup to maintain power during unexpected power outages.

A typical consumer UPS is a surge protector that contains a high-capacity rechargeable battery. Smaller UPS devices look like bulky power strips, while larger ones may stand upright and look almost like small computers. Many businesses use uninterruptible power supplies to keep their equipment running in case of a power failure. While a UPS may only keep a computer running for 15 minutes after the power is lost, it is usually sufficient time to save all necessary documents and properly shut down the computer. That extra time can be invaluable to someone who is working on an important document or project that has not been recently saved.

The working principle of uninterruptible power supply (UPS)

The working principle of UPS power supply is very simple. It is rectified by the mains, then charge the battery, and then supply power to the inverter through the battery, so as to achieve the purpose of automatically supplying power to the load after the mains is cut off.

AC-DC Conversion: The alternating current from the grid is reduced by an auto transformer, full-wave rectification, and filtering into a direct current voltage, which is then supplied to the inverter circuit. The AC-DC input has a soft start circuit, which can avoid the impact on the power grid when starting.

DC-AC Inverter Circuit: adopts high-power IGBT module full-bridge inverter circuit, which has a large power margin, and the output impedance is particularly small in the output dynamic range, and it has a fast response characteristic. Due to the use of high-frequency modulation current-limiting technology and fast short-circuit protection technology, the inverter can work safely and reliably whether it is a transient supply voltage, a load impact or a short circuit. 

Control Drive: Control drive is the core to complete the function control of the whole machine. In addition to providing detection, protection, synchronization and various switch and display drive signals, it also completes the control of SPWM sinusoidal pulse width modulation, due to the use of static and dynamic dual voltage feedback . Greatly improve the dynamic characteristics and stability of the inverter.

UPS power supply is divided into Backup Type and Online Type according to the working principle

• The Backup UPS Power Supply has the most basic and important functions of UPS such as automatic voltage stabilization and power failure protection. Although there is generally a conversion time of about 10ms, the AC output of the inverter is square wave instead of sine. Wave, but due to its simple structure, low price and high reliability, it is widely used in microcomputers, peripherals, POS machines and other fields;

The working principle of backup UPS, when the power supply of the power grid is normal, one mains power supply will charge the battery through the rectifier, while the other mains power supply is initially stabilized by the automatic voltage stabilizer and absorbs part of the grid interference, and then the bypass transfer switch directly supplies Load power supply. At this time, the battery is in a state of charge until the battery is fully charged and transferred to a floating state. UPS is equivalent to a voltage stabilizer with poor voltage stabilization performance, but it only improves the fluctuation of the mains voltage range, and does not make any adjustments to "electrical pollution" such as frequency instability and waveform distortion on the grid.

When the grid voltage or grid frequency exceeds the input range of the UPS, that is, under abnormal conditions, the AC input has been cut off, the charger stops working, the battery discharges, and the inverter starts to work under the control of the control circuit. The inverter generates 220V, 50Hz alternating current. At this time, the UPS power supply system is converted to continue to supply power to the load by the inverter. The inverter of the backup UPS is always in the state of backup power supply.

• The Online UPS Power Supply structure is more complex, but its performance is perfect, and it can solve all power problems. Its distinctive feature is that it can continuously output pure sine wave AC power with zero interruption, and can solve all power problems such as spikes, surges, and frequency drift. Larger investments are usually used in critical equipment and network centers and other environments with demanding power requirements.

The working principle of online UPS, when the online UPS is normally powered by the grid, the input voltage of the grid passes through the noise filter to remove high-frequency interference from the grid, and pure AC power can be obtained, which enters the rectifier for rectification and filtering, and converts the AC power into After smoothing the DC power, it is divided into two channels, one enters the charger to charge the battery, and the other is supplied to the inverter. However, the inverter converts the DC power into 220V, 50Hz AC power for the load.

When the mains power is interrupted, the AC input has been cut off and the rectifier no longer works. At this time, the battery discharges and delivers energy to the inverter, and the inverter converts the DC power to AC power for use by the load. Therefore, for the load, although the mains power no longer exists, the load is not stopped due to the interruption of the mains and can still operate normally.

The working principle of online interleaved UPS, when the mains power is normal, the mains supply power to the load directly, when the mains power is low or high, the output is stabilized through the internal voltage stabilizing circuit of the UPS, and when the mains power is abnormal or power failure, it is passed The transfer switch is converted to battery inverter power supply. Its characteristics are: a wide input voltage range, low noise, small size, etc., but there is also a switching time, but compared with the general backup UPS, this model has a stronger protection function, and the inverter output voltage waveform is relatively large. Well, it is generally a sine wave.

Theory - 33 :- PCMCIA Card

 PCMCIA Card

Stands for "Personal Computer Memory Card International Association." PCMCIA was an organization that focused on creating expansion card standards for portable computers. It began in 1989 and lasted until 2010, when it was acquired by the USB Implementer Forum (USB-IF).

The most notable product developed by the Personal Computer Memory Card International Association is the PCMCIA Card (commonly called a "PC card"), which provided expansion capabilities for laptops. The card could be inserted into a PCMCIA slot on the side of a laptop, providing additional memory or connectivity. There were three versions of the PCMCIA card standard:

• Type I - 3.3 mm thick - used for memory expansion
• Type II - 5.0 mm thick - most common; used for NICs (Ethernet cards), modems, and sound cards
• Type III - 3.3 mm thick - used for ATA hard drives

Larger PCMCIA slots were backwards compatible with smaller cards. For example, a Type III slot could support Type 1, 2, and 3 cards and a Type II slot could support Type 1 and 2 cards.

In the 1990s, PCMCIA cards were a common means of adding extra functionality to laptops. But as laptop components became smaller, manufacturers were able to fit all the necessary components into their laptops, making PCMCIA cards unnecessary. Additionally, many peripherals that previously required a PCMICA card became available in USB versions. In the early 2000s, the trend towards thinner and lighter laptops eventually made PCMCIA cards obsolete.

A PCMCIA card has a 68‐pin connector that connects into a slot in the PC. There are three sizes (or "Types") of

PCMCIA cards:

The Type I and II cards work in a Type III slot and a Type I card will work in a Type II slot. (On the other hand, the thicker cards can't be fitted into the slots for the thinner cards.)

The PCMCIA standard is most commonly applied to portable PCs but it can also be used on desktop computers. The PCMCIA card is not to be confused with another credit‐size electronic card, the smart card.

In computing, PC Card is a configuration for computer peripheral interface designed for laptop computers. Originally introduced as PCMCIA Card, the PC Card standard as well as its successors like Card Bus were defined and developed by the Personal Computer Memory Card International Association (PCMCIA).

PCMCIA slots also come in three sizes ‐‐ a Type I slot can hold one Type I card, a Type II slot can hold one Type II card or two Type I cards, and a Type III slot can hold one Type III card or one Type I and one Type II card. PC Cards can be removed or inserted "on the fly," which means you don't have to turn your computer off to exchange them and you don't have to restart for your computer to recognize them.

Theory - 30 :- How Speaker Works

 

What is a Speaker?

Speakers are used to connect to a computer to generate sound, which are one of the most common output devices. Some speakers are designed to connect with any kind of sound system, while some can be hooked up only with computers. With the computer speaker, the computer's sound card creates a signal that is used to produce sound. The primary objective of speakers is to offer audio output for the listener. The electromagnetic waves are converted into sound waves through the speaker as they are transducers. The devices, like an audio receiver or computer, give audio input to speakers, which may be in the form of analog or digital. The function of the analog speaker is simply to magnify the analog electromagnetic waves into sound waves.

The sound waves are produced in analog form, but first, the digital input is converted into an analog signal by digital speakers then the sound waves are generated. The amplitude and frequency define the sound produced by speakers. The frequency determines the pitch of the sound of how high or low it is. For case, a bass guitar or kick drum generates low sounds waves, while a soprano singer's voice produces sounds in the high-frequency range. The sound quality, how clear it will be, depends upon the speaker system's ability; if it is able to accurately reproduce sound frequencies, it can be the best indicator to determine audio quality.

 

Rating a speaker

Speakers are rated in distortion, watts, frequency response, and total harmonic.

• Frequency response: It is produced by speakers, which is the rate of the lows and highs of the sound.
• Watts: For the speakers, it is the amount of amplification.
• Total harmonic distortion (THD): It is the amount of distortion created with the help of amplifying the signal.

Need of Computer Speakers

There are many tasks or events that can be completed through speakers. They are used to produce sound to hear by the listener, create surround sound, and add more bass with a sub woofer. External speakers are also available in the market that needs to attach to the computer or another device to produce the sound. The external speakers are not needed if you do not need louder sounds, louder sounds, more bass, or you have a Smartphone, laptop, or other devices that have internal speakers.

 

How Do Speakers Work?

Speakers produce sound! You already know that, but do you know how they work? This article will guide you through a conceptual overview of how speakers convert an electrical signal into sound. No matter what you are told, no matter how pretty they look, no matter how fancy of words people use, speakers just make sound. Although the explanation of what they do is simple, how speakers work, and how to make them work well, can be extremely complicated. Gaining knowledge about how speakers work will better help you understand how a speaker functions, as well as help you become an informed buyer when you purchase audio equipment.

How Is Sound Made?

Sound is a phrase that typically refers to frequencies that the human ear can hear (20Hz -20,000Hz). Sound is created by the fluctuation of air pressure caused by the movement and/or vibration of a given object. When an object moves or vibrates, it transmits the kinetic energy to the air particles around it. The most common analogy for this is to visualize waves in water. Frequency is the word we use to describe the length of a single wave. The frequency is affected by the speed of vibration of the sound-creating object. Slower vibrations equate to lower-frequency sounds. Faster vibrations make higher-frequency sounds.

As stated above, the human ear can hear frequencies from 20Hz to 20,000Hz (20 kHz). When a sound's frequency is on the lower end of our hearing scale (down near 20Hz), we hear deep/low notes/sounds we commonly call Bass. When the frequency is up near 20 kHz, we hear high-pitched sounds we commonly call treble. We call the middle ground frequencies Midrange. Those of us who are fortunate enough to be able to hear most of these frequencies know that we are surrounded by sounds at all times; the world is a noisy place.

Humans are capable of creating sounds in many ways. Most of us can make sound with our vocal cords. Some of us are able to use our hands or lung power to make instruments produce sounds. Babies cry for their parents, children bang on plates, teenagers scream at their parents, and some of us use our knowledge of science to create equipment that can reproduce sound; speakers! We are all deeply connected to sound in many ways. Knowledge of how we create sound, and incorporate it into our daily lives, will help you notice phenomena that you never knew were there.

How do Speakers make sound?

A speaker's function is fairly simple. A speaker converts electrical signals into acoustical energy: sound. By moving back and forth, the speaker increases and decreases the air pressure in front of it thus creating sound waves. Below is a basic diagram of a speaker.

As you can see, there are not many parts. However, minimal variations in each component can have dramatic effect on 84

The speaker's performance.

 

The Essentials: Cone, Suspension, Magnet, Voice Coil, and Frame.

The cone is the main moving mass of the speaker. The larger the cone, the more mass and surface area a speaker will have. The more surface area a speaker has, the more air it can move. The more air it can move, the louder the speaker can get; In a nutshell.

 

NOTE: Accurate, High frequency replication requires smaller specialty drivers; tweeters. The suspension and the spider keep the voice coil aligned and act like a spring when the speaker is in motion. The suspension pulls the cone back to the center position when it moves back and forth. If there were no suspension, there would be nothing to hold the voice coil and cone in place. The rigidity, composition, and design of the suspension can greatly affect a speaker's performance. Below is a diagram of how a speaker's suspension works.

The magnet structure is what creates the standing magnetic field. This standing magnetic field gives the voice coils generated field something to push off of. A strong standing magnetic field allows greater cone motion potential. The stronger this field is, the further it spans thus allowing a voice coil's field more to push off of. The entire action is similar to the idea behind a solenoid. The below diagram demonstrates the voice coil's relationship with the standing magnet field.

The voice coil and standing magnetic field are what makes the cone move. When an electrical current/signal from an audio amplifier (alternating at the same frequency as the sound that created it) is put into a speaker's voice coil, the voice coil generates an alternating magnetic field. The alternating polarity of the voice coil causes it to be repelled-from and attracted-to the standing magnetic field. This action of alternating attracting and repelling causes the cone (attached to the voice coil) to move! When the cone moves between 20Hz-20 KHz, the speaker makes sound that we can hear!

All of the above components are held together by the frame. The voice coil is connected to the cone which is connected to the frame via the suspension and spider. The magnet structure is held in place by the frame. The frame keeps the family together and it has to be strong to keep everyone together when things start moving. Without anyone of these crucial components, the speaker would not exist.

What is a driver?

Drivers are specialist. Drivers are speakers that have a certain job to fill and that job is voicing a certain range of frequencies. There are traditionally three types of drivers: Woofers, Midrange, and tweeters. Woofers specialize in producing low frequencies and are the largest of the drivers. Midrange drivers specialize in producing midrange frequencies. Tweeters specialize in producing high frequencies. Sub-woofers, which you may have heard of, are special drivers that focus on replicating very low frequencies; many of which we can't hear. This driver's purpose is to add the shake, rumble, and roll to a listening experience. Sub woofers can bring a home theater system closer to sounding and feeling like a movie theater sound system which adds to your home theater experience. Sub-woofers can also make music listening feel like a live experience. Live music experiences are typically experienced at louder volumes where you can feel the bass and impact of the instruments. Sub woofers replicate this sensation but without the other frequencies being at high volume which can be uncomfortable to your ear.

Although there are many different types, styles, and sizes, speakers just make sound. Knowing how they make sound can add a new dimension to a listening experience. Much like knowing a little bit about how a car works may change your driving habits, knowledge about speakers can help you operate them more efficiently. We hope this article helps you understand speakers a little more and gives you a little more confidence when you go out a purchase them.

Theory -29 :- Sound Cards & Its Connectors and Components

 Sound Cards

 The sound card (also called an audio card) is the part of a computer which manages its audio   Input and output.

It is usually a controller which can be inserted into an ISA slot (or PCI for more recent ones), but more and more Motherboards include their own sound card.

Sound Card Connectors

The main components of a sound card are:

1. The specialized processor, called the DSP (digital signal processor), which does all the digital audio processing(echo, reverb, vibrato chorus, tremolo, 3D effects, etc.);
2. The digital to analog converter, or DAC for short, which converts the computer's audio data into an analog signal for being sent to a sound system (such as speakers or an amplifier);
3. The analog to digital converter, or ADC for short, which converts an analog input signal into digital data which a computer can process;
4. External input/output connectors:  
• On or two standard 3.5 mm line‐out jacks, normally light green in color;
• A line‐in jack;
• A microphone input (sometimes called Mic), usually a pink‐colored 3.5 mm jack;
• An SPDIF digital output (Sony Philips Digital Interface, also known as S/PDIF or S‐PDIF or IEC 958 or IEC 60958 since 1998). This is an output line which sends digitized audio data to a digital amplifier using a
• Coaxial cable with RCA connectors at the ends.
• A MIDI connector, usually gold‐colored, which is used for connecting musical instruments, and can serve as a game port for plugging in a controller (like a joystick or game pad) which has a SUB‐D 15‐pin connector.
5.  Internal input/output connectors:

• A CD‐ROM/DVD‐ROM connector, with a black socket, which is used to connect the sound card into a CD‐ROM's analog audio output using a CD Audio cable;
• Auxiliary inputs (AUX‐In), with white sockets, used for connecting internal audio sources such as a TV tuner card;
• Telephone answering device connectors (TAD), which have a green connector.

Components:

 

The modern PC sound card contains several hardware systems relating to the production and capture of audio, the two main audio subsystems being for digital audio capture and replay and music synthesis along with some glue hardware. Historically, the replay and music synthesis subsystem has produced sound waves in one of two ways:

 

1. Through an internal FM synthesizer

2. By playing a digitized, or sampled, sound.

 

The digital audio section of a sound card consists of a matched pair of 16‐bit digital‐to‐analogue (DAC) and analogue‐to‐digital (ADC) converters and a programmable sample rate generator. The computer reads the sample data to or from the converters. The sample rate generator clocks the converters and is controlled by the PC. While it can be any frequency above 5kHz, it's usually a fraction of 44.1kHz.

Most cards use one or more Direct Memory Access (DMA) channels to read and write the digital audio data to and from the audio hardware. DMA‐based cards that implement simultaneous recording and playback (or full duplex operation) use two channels, increasing the complexity of installation and the potential for DMA clashes with other hardware. Some cards also provide a direct digital output using an optical or coaxial S/PDIF connection.

A card's sound generator is based on a custom Digital Signal Processor (DSP) that replays the required musical notes by multiplexing reads from different areas of the wave table memory at differing speeds to give the required pitches. The maximum number of notes available is related to the processing power available in the DSP and is referred to as the card's "polyphony".

DSPs use complex algorithms to create effects such as reverb, chorus and delay. Reverb gives the impression that the instruments are being played in large concert halls. Chorus is used to give the impression that many instruments are playing at once when in fact there's only one.

Theory- 27 :- What is a Sound Card?

 What is a Sound Card?

The Sound Card is an expansion card that allows the computer to send audio information to an audio device like speakers or a pair of headphones.

Nearly all sound cards support MIDI, a standard for representing music electronically. In addition, most sound cards are Sound Blaster‐compatible, which means that they can process commands written for a Sound Blaster card, the de facto standard for PC sound.

History of the Sound Card

The sound card, capable of 4-voice music synthesis, Gooch Synthetic Woodwind is considered the first sound card. It was used by PLATO terminals, which was invented by Sherwin Gooch in 1972.

AdLib was one of the first companies that began to manufacture sound cards or IBM PC-compatible computers. In 1987, on the basis of the Yamaha YM3812 sound chip, AdLib developed the Music Synthesizer Card.

Although until 1988, sound cards were very uncommon for the IBM PC. For the majority of IBM PC users to produce sound and music, the internal PC speaker was the only way. Consequently, basing "beeps and boops," sound was described that was led to the common nickname "beeper. At the time sounds were played, there was a need to stop all other processing.

The Consumer Electronics Show that the PC's were unable to become the leading home computer as they only had limited sound, it was stated by a panel of computer-game CEOs in 1988. As compared to current products, it required a $49-79 sound card with better capability. In 1989, it was founded in a Computer Gaming World survey that AdLib, six Roland and Covox, and seven Creative Music System/Game Blaster were planned 18 of 25 game companies to support.

Sound cards use two basic methods to translate digital data into analog sounds:

FM Synthesis mimics different musical instruments according to built‐in formulas. Wave table Synthesis relies on recordings of actual instruments to produce sound. Wave table synthesis produces more accurate sound, but is also more expensive.

Uses of a Sound Card

The primary use of a sound card is to provide sound that you hear from playing music with varying formats and degrees of control. The source of the sound may be in the form of streamed audio, a file, CD or DVD , etc. There are many applications of a computer where a sound card can be used, which areas are as follows:

• Games.
• Voice recognition.
• Watch movies.
• Creating and playing MIDI.
• Educational software.
• Audio and video conferencing.
• Business presentations. 
• Record dictations.
• Audio CDs and listening to music.

Types of Sound Cards

The sound card is an expansion component in the computer that makes capable you to hear the sound, which comes from video files, mp3 file, and more other. In the late 1980s and early 1990s, sound cards first started to enter the mainstream. In modern times, almost all computers come with one. Mainly, sound cards have three types, and all contain their own advantages.

• Motherboard Sound Chips The sound cards were costly add-on cards when they were introduced for the first time. Its cost was hundreds of dollars.
  
  
  
  When the computer sound technology became available at a low price, miniaturization technology allowed computer hardware manufacturers to produce sound into a single chip. In modern times, there is a rare chance to find a computer not containing motherboard sound chip. Even if they only contain a separate sound card. The motherboard sound chips made sound card affordable for all computer owners. You can identify if your system has a motherboard sound chip.

• Standard Sound Cards 

Inside the computer, a standard sound card connects to one of the slots. Using a sound card rather than motherboard sound chip, offer a benefit as it contains its own processor chips.And,

a motherboard sound chip produce sound on the basis of the computer processor. When playing games, a standard sound card offers better performance as it creates less of a load on the main processor.

• External Sound Adapters 

An external sound adapter has all the same features like standard sound card. It is a small box that enables connection to computer with the help of USB or FireWire port, instead of an internal expansion slot. Sometimes, it contains a feature that is not included by a standard sound card, such as physical volume control knobs and extra inputs and outputs. As compared to the standard sound card, it is much easier to move an external sound adapter to a new computer. Also, with USB or FireWire expansion slots, it is the only way to upgrade the sound of a laptop.

Theory - 26 :- Major Components of a Projector/RPTV Lamp

Major Components of a Projector/RPTV Lamp

 

Projector Lamp Experts have designed some detailed diagrams to help explain the major components of an average projector and RPTV lamp.

There is often confusion with customers over the difference between a lamp, urner, module and connectors - all of which are important parts to understand when purchasing a projector lamp. Some companies do not sell the complete lamp module which can cause frustration and confusion for customers. This section will explain the different components of a projector lamp and what to look out for.

Typically when the Audio Visual and IT industry refers to a "projector lamp" they are actually talking about a complete projector lamp module (rather than the bare lamp), which includes at a basic level a bare lamp which includes a burner and reflector (usually made by Osram, Philips or Ushio), plastic module housing (often called a cage), and connectors.

Please refer to the diagram below.

 

The Burner/High Intensity Discharge Bulb is place inside a reflector creating a lamp. The lamp is then placed inside a housing or cage specifically designed for the projector or RPTV. The lamp is then connected to the projector via connectors.

Below is an image of projector lamp housing without a lamp or connectors inside: 

When looking at a bare lamp in detail there are several major components: The front glass, the burner (also known as a high intensity discharge bulb), and the reflector. Bare lamps are often sold on the open market, requiring the customer to install the bulb into their used module. We do not recommend this process to our customers, hence we only sell complete projector lamp modules for easy installation.

Light is emitted when metal halide atoms in the High Intensity Discharge bulb (burner) are excited by an electrical discharge between two electrodes in the bulbous midsection of the bulb.

 

Theory -25 :- How Projector Works?

 

Projector - Introduction, Types And Works

A projector is an output device that is capable of connecting to a computer, which may be an other option for a monitor or television in terms of displaying pictures to a large number of people. It takes images generated by a Blu-ray player or a computer and projects them onto a large surface like a wall or white screen. Projectors come in many shapes and sizes and are used in conditions like a classroom, home cinemas, office training or presentation sessions, etc. The projector looks like the below picture.

Projectors can be used for displaying pictures or videos on the front or rear. The screen is the difference between both types of projection, which is semi-transparent grey for rear projection and non-transparent white for front projection. In the front projection, the pictures are sent to the front of the screen from the audience. This process does not need an empty space back side of the screen; therefore, this process is most common.

In the rear projection, the pictures are sent from behind the screen toward the audience. This method provides better contrast as compared to front projection and is less affected by ambient light. Commonly rear projection is used in commercial areas where more space is available and also used in outdoor settings.

Types of Projector

The LCD (liquid crystal display) and DLP (digital light processing) are two common types of projectors. However, CRT (cathode ray tube) projector is another type of projector, which was popular in the earlier times of projectors. In modern times, CRT projectors are no longer in use; because they provided low light output and came in a large size.

 

Cathode Ray Tube (CRT)

A CRT, which stands for Cathode Ray Tube projector, is a video projecting device that uses a cathode ray tube (which is small and high-brightness) as the image generating element. A Lens is kept in front of the CRT face through which the image is focused and enlarged onto a screen. In the early 1950s, color CRT projectors came on the market for the first time. Instead of a single-color CRT, most of the modern CRT projectors have colored (red, green, and blue) CRT tubes and their own lenses to generate color images and commonly come with color features. An example picture of a CRT projector is given below.

CRT projectors are not commonly in use today, as they consume high electricity and are heavy in weight, and large in size. Also, they are not portable. Although according to users, the picture quality of CRT projectors is brilliant, it may be tricky and difficult to set up a CRT projector at the initial stage. As compared to newer technologies, the projectors are capable of compatible with new improvements; hence, they are nevertheless.

Liquid Crystal Display (LCD) 

An LCD projector is a type of projector based on liquid crystal displays, which is widely used in business seminars, presentations, and meetings. They utilize liquid crystal to display images, data or video, and function on trans missive technology. 

LCD projectors have excellent color reproduction and are cheaper to produce, which makes them more popular as compared to many alternatives. 

Generally, these kinds of display panels are used in many devices, such as cell phones, portable video games, Laptops, computers, and TVs. Comparing with CRT technology, the display in LCD technology is much thinner. The below picture represents how looks an LCD projector.

Digital Light Processing (DLP)

DLP projectors are utilized for front and back projection units and can be classified as one-chip or three-chip. Over 16 million colors can be produced by one-chip DLP projectors, whereas more than 35 trillion colors can be produced by three-chip models, which makes the projector capable of providing more lifelike and natural images. It is used in organizations and classrooms in terms of front projectors and also utilized for back projection in TVs. The below image is an example of a DLP projector.

DLP projectors are utilized for front and back projection units and can be classified as one-chip or three-chip. Over 16 million colors can be produced by one-chip DLP projectors, whereas more than 35 trillion colors can be produced by three-chip models, which makes the projector capable of providing more lifelike and natural images. It is used in organizations and classrooms in terms of front projectors and also utilized for back projection in TVs. The below image is an example of a DLP projector.

How a Projector Works

A projector works with the help of a small transparent lens. There are various technologies available that can display the images or objects from your source media, like using lasers rather than LEDs.

The LCD projector was the projector type that was dominated by projectors primarily used for computer monitor mirroring and business presentations. Due to the tech became more common and available, they were also commonly used as television alternatives. Now, you have prism-like Digital Light Processing (DLP), mirror-based projectors, including the LCD/DLP hybrid projectors, which combine DLP prisms and LCD tech together.

What to look for in a Projector?

When you are planning to buy a projector, you need to consider your specific goals or applications and the price that you can afford. Mainly, determining your budget is the best bet to buy a project. Also, you can adjust things according to your requirements, whether you need a low-latency projector for online first-person shooter gaming purposes or you are willing to torrent for a particular type of projector. Your personal preferences and financial circumstances should work to get you the right projector.

Uses for Projectors

Actually, the applications of a projector depend on the projector type you have. Generally, projectors can be used to project video, slides, and images onto a screen and also used in business meetings, conferences, classrooms, and churches for presentation. There are various kinds of projectors; some of them can be used for different purposes, and even one projector can be used for some other objectives. For example, mostly the use of a video projector is not uncommon, which is usually used in home theaters. The main applications of projectors used in daily life are given below:

• Educational and Classroom
• Home Theater:
• Advertising and Art Installation: