What are the advantages of digital multimeter over analog multimeter

Here that main advantages of digital multimeter over analog multimeter:
  • A digital multimeter provides better accurate results.
  • They reduce reading and interpolation errors.
  • Portable size makes it easy to carry anywhere.
  • They have very high input impedance.
  • This meter can cause less meter loading effects on the circuits being tested.
  • The input impedance or resistance of DMM is quite high. Hence it does not the measurement much. Hence some precise measurement can be achieved.
  • This meter can cause less meter loading effects on the circuit being tested.
  • Nowadays some advanced digital multimeter has microprocessors and can store the reading for further processing.
  • They are very simple to use unlike the analog multimeter as results are displayed in numeric value directly users need not have to read manually from the scale.
  • Digital multimeter displays no moving parts. So this makes them free from wear and also a shock failure.
  • Unlike analog millimeters, zero adjustments are not required.
  • The reading speed is increased as it is easier to read.
  • All the advanced measurements such as frequency, impedance, transistor, the capacitance can be performed by DMM, unlike analog meter counterparts.
  • The digital output is suitable for further processing or recording and can be useful in a rapidly increasing range of computer-controlled applications.
  • The meter has protection against undesired input range. Hence the meter can be protected from overload or some of the fault or misuse.
  • The auto polarity function can prevent problems from connecting the meter to a test circuit with some wrong polarity.
  • Overall accuracy is increased due to digital readout. When you have used, you can make a mistake in reading the scale in analog multimeter, but digital multimeter has an LCD display to show accurate reading.
  • With the advent of an integrated circuit the size, cost and power requirement of digital multimeter have been drastically reduced.
  • Parallax errors are eliminated. If the pointer of an analog multimeter is viewed from a different angle you will see some of the different values. This is called the parallax error, which is solved digital multimeter to solve this problem.
Considering some above points mentioned above in the advantages of DMM compared to analog, I personally would prefer the digital multimeter for its high accuracy and more sleek nature. I hope this article proves to be informative if you are going to buy a multimeter. 

CD full form

What is the full form of CD?

Answer:

  • Compact Disk

What does CD mean?

CD is an optical disc which used to store data including text, video, some audio, etc. As we know that when the data is written to the CD using an optical device known as CD writer which can be read through a similar device known as a CD drive. This device is portable, hence they can be taken anywhere according to one's need.

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Advantages and disadvantages of optical disk

As we know, An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. It is a computer storage disk that stores data by digitally and uses late beams to read and write data. Here this post gives information about the advantages and disadvantages of the optical disk to better understand this topic.

Advantages of optical disk compare to magnetic disk:
  • The storage capacity of the optical disk is more than a magnetic disk.
  • The optical disk is physical storage than magnetic disks and can not be damaged easily.
  • The magnetic disk is sensitive to be touched whereas optical disk is not.
  • Magnetic filed do not cause any effect an optical disk whereas they affect the magnetic disk.
  • The optical disk has a lot of data as special of the double side of the DVD.
  • An optical disk is much sturdier than tape or floppy disk. It is physically harder to break or melt or wrap. It is somewhat harder to lose than a USB flash drive.
  • This allows computer systems to be also used as the music systems.
  • Music CD can be played on a computer having a CD ROM drive along with a soundboard and speakers.
  • Due to their compact in size and also a lightweight, optical disks are easy to handle, to be store and port from one place to another.
  • The time required for positioning read-write head over the proper track.

Disadvantages of the optical disk:

  • The main disadvantages have cost both for the drive and the disks.
  • It is not quite as easy or as fast to copy an optical disk as it is to the software and hardware for writing disks.
  • More complicated drive mechanism.
  • Need careful handling.
  • Label optical disk for easy identification.
  • Use offline.
  • The risk to lose data.
  • Prone to scratches, dust, sticky prints.
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Advantages and disadvantages of magnetic disk

As we know that the magnetic disk is the most popular direct access secondary device. They are also the most popular online secondary storage of the device. The magnetic disk comes in various sizes. They can be portable or permanently mounted in their storage devices or disk drives. Here now this post gives the information about the advantages and disadvantages of a magnetic disk to better understand this topic. 

Advantages of a magnetic disk:

  • Data records can be stored for both sequential and direct access.
  • This disk was the high speed of access and update as no sorting of transactions.
  • They follow direct access mode for reading or the writing data onto some data files.
  • The data transfer time rate for the magnetic disk system is normally higher than a tape system.
  • The magnetic disk is suitable for both online and offline storage of data.
  • Online disk records of several related files can be updated simultaneously by using only a single input transaction.
  • Floppy disk and zip disks both are being compact in size and light in weight are easy to handle and store.
  • The magnetic disk is less valuable to data corruption due to careless handling.
  • Due to random access property, a magnetic disk is often used by multiple users as a shared device.
  • Floppy disk and another is to be zip disk is also easily portable from one place to another. They are used for the transfer of data.
  • Any information desired from this disk storage can be accused in a few milliseconds because it is a direct access storage device.
  • The storage capacity is unlimited as many numbers of disk required can be added.
  • Due to low cost and high recording densities cost per magnetic disk are too much less or minimum. 
  • Less prone to corruption of data.

Disadvantages of a magnetic disk:

  • Expensive than magnetic tapes.
  • It must be stored in a dust-free environment in order to protect them from crashing down.
  • This disk was more susceptible to breach of security and access gain to sensitive online disk files from remote terminals.
  • Difficult to maintain the security of information.
  • Not ideal for devices that require access required is of sequential nature than direct or random nature.
  • A disk drive or disk failure results in loss of entire data stored on it.
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Advantages and Disadvantages of DVD

As we know that DVD is a type of compact disk able to store a large amount of data, especially high-resolution audiovisual material so when you have compared your data storage options, there is no one size fits at all approach. At that time you may find DVD storage is perfect for your situation, while another user may find it inconvenient. Here this post gives the information about merits or advantages and disadvantages or demerits of DVDs to better understand this topic.

Advantages of DVDs:

  • Very large storage capacity.
  • Increasing availability.
  • It is easily available in every store.
  • It is portable.
  • High data stability.
  • The DVD drive can read CDs.
  • DVDs are now mass-produced so they are relatively cheap.
  • Sound and picture quality is excellent which makes them suitable for sound and video.
  • Price is dropping for both DVDs as well as for the DVD drives.

Disadvantages of DVDs:

  • DVDs do not work in CD ROM drives.
  • It is not easy to change data.
  • There is no single standard on DVD.
  • When we have to use DVDs,  it has built-in copy protection and regional lockout.
  • Still, a relatively new technology so still expensive compared to CD-ROMs and VCR.
  • It require burning software to record some information to it.
  • DVD uses digital compression. poorly compressed audio or video may be like fuzzy, harsh or vague, and blocky.
  • DVD doesn't fully support HDTV.
  • They can be easily damaged by breaking or by some scratching.
  • Some DVD players and drives can't read record-able DVDs.
  • Some DVD players and drives can't read CDs.
  • View a few players who can play in reverse at normal speed.
  • Variations and options such as like DVD audio, DVD-VR, and DTS audio tracks are not supported by all players.
  • Most DVD players and drives can't read DVD-RAM discs.

Magnetic tapes advantages and disadvantages

Magnetic tape is most commonly used to record and to store computer and video data. Before the CD and DVD came along, the magnetic tap was widely used by consumers. Magnetic tape is most communally used y large companies and organizations that require massive data stores. Here this pose gives information about the advantages and disadvantages of magnetic tape to better understand this topic.

Advantages of magnetic tape:
  • Magnetic tape can e recorded over and reused repeatedly.
  • Magnetic tape is inexpensive and budget-friendly.
  • Can storage large amounts of data unto 1 terabyte per tape cartridge.
  • Data collection can go without interruption overnight or for an entire weekend.
  • It can be set up to do the back up overnight or over the weekend.
  • It is probably the cheapest form of storage per megabyte of storage.

Disadvantages of magnetic tape:

  • Magnetic tape has a lifespan of 15 years. Data quality erodes over time.
  • This tape is necessary to keep older tape equipment just to be able to read the stored data.
  • If the data is stored ear a strong magnetic field or large speaker, the tape can be damaged.
  • Magnetic tap is in physical contact with the recording heads, causing friction and wear. 
  • Special equipment must be purchased and set up to record and store data. The data can only be read on the special type of equipment.
  • It is slow compared to magnetic disks.
  • It is not flexible, and updating the records is difficult.
  • Away from corrosive gases ad chemicals, they can cause tape reading errors.
  • Use parity bits, hence if a minor error occurs it is difficult to recover the data.
  • It was sequential in nature, not suitable where data is accessed and requires a random order.
  • This tape is needed to be a special piece of equipment to record and read the data on the tape.
  • The tape can stretch or break or lose its magnetic data to age, heat, or the earth magnetic field.

MCB applications

Some of the applications of  MCB are listed below:

  • MCB is used in new constructions home, shops instead of the older types of fuses.
  • MCB is designed to protect the house from the circuit overload.
  • MCB is required in homes, offices, and shop distributions boards for the protection of individuals' circuits and complete wiring systems in that building through the main circuit.
  • They are being used extensively these days and are virtually replacing the traditional rewire-able fuses.
  • MCB can be used with a ground fault or arc-fault mechanism because the breakers consist of the system that opens the contacts if a line to ground fault occurs.
  • MCB is sightly more expensive than fuses but this is offset by the fact no cost is involved. I resting them after the operation and it is a very quick and simple process.
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Limitations of ELCB

Some limitations of ELCB are listed below:

  • Failure to respond at certain conditions.
  • As we know the disadvantages of ELCB as that ELCB needs a sound earth connection, for the load protects.
  • ELCB does not detect a fault that doesn't pass current through CPC to earth rod.
  • ELCB does not allow a single building system to easily split into multiple sections with independent fault protection because the earthing system is bonded to the pipework.
  • Some electrical leaky appliances water heater, washing, machine, and coolers may cause CKL to trip.
  • ELCB may be tripped by the external voltage from something connected to the earthing system such as a metal pipe.
  • This breaker may be tripped by external voltage from something connected to the earthing system such as metal pipes.
  • If the electrical installation earth rod is placed close to another or the same of the earth of a building, then a high earth leakage current from other buildings can raise the local ground potential and cause a voltage difference across the two earth, again tripping to the ELCB.
  • They introduce additional resistance and an additional point of failure into enough voltage to cause it to trip.
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Limitations of RCCB

Some limitations of RCCB are listed below:

  • RCCB does not protect from the overheating that strike if conductors are not screwed into terminals.
  • RCCB does not guarantee to operate if none standard waveform is generated by the load. It is because RCCB is designed to operate on a normal supply waveform.
  • RCCB does no shield against line neutral shocks.  Because the reason for the current in them is stable. The current gets balanced as both the terminals are carried together.
  • RCCB does not protect against line neutral shocks. It's mainly because the current in them is balanced. The current gets balanced between as both terminals are held together.
  • In RCCB, there might be some unwanted tripping of RCCB. It is mainly because whenever there are sudden changes in electrical load, there can be small current flow to earth, especially in the old appliances.
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Precautions of multimeter

Some precautions of multimeter:

  • When you have to use multimeter first check proper DC polarity when measuring DC.
  • You have to always start with the highest voltage or current range.
  • De-energize and discharge the circuit completely prior to connecting or disconnecting to a device called a multimeter.
  • Be sure that the multimeter is switched during the to AC prior to trying to measure AC circuits.
  • Choose the final range that enables a reading close to the middle of the scale.
  • Set the ideal current range before measuring higher current or some else it will blow the digital multimeter fuse. 
  • A resistor should be measured standalone or the connected parts in the circuit may affect to some of the reading.
  • Never apply power to the circuit when you have to measure resistance with a multimeter.
  • Be sure to read AC measurements on the AC voltage position.
  • In case you want to verify the presence of dangerous voltage in a circuit with a digital multimeter, it is crucial to verify both the  AC as well as DC voltage.
  • Make sure that change the 0 ohms reading after changing resistance ranges before creating a resistance measurement.

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Applications of multimeter

We all know that a multimeter is extremely too important for electronics and electrical instruments and is extensively used for carrying out various tests and to measurements in electronics as well as electrical circuits. 

There are two types of multimeter basically analog multimeter and digital multimeter. they are many advantages of the analog multimeter as well as digital multimeters advantages. The applications are measuring accurately circuit and component parameters. They are different type of multimeter is used for the test, to adjust and troubleshoot electronic circuits, traditionally multimeter of either type measure three main parameters.

1. Current both AC and DC
2. Voltage both AC and DC
3. Resistance

The main Applications of multimeter are listed below:

  • Voltage measurement: High and low value DC measurement and peak to peak and DC average measurement.
  • It will use for temperature and environmental applications: Low-cost weather station, DMM internal temperature.
  • Resistance measurement: Micro ohm meter, measuring with constant voltage and measuring resistance with constant current
  • Time and frequency measurement: Fast frequency, and time measurement
  • Current measurement: DC current measurement, true RMS AC current

LiFi vs WiFi: Which Technology Will Dominate the Future?

We all know that LiFi stands for Light fidelity while in WiFi stands for wireless fidelity. LiFi uses the light for data transmission while in WiFi uses electromagnetic waves at radio frequencies for data transmission. In this article, we list some main key difference between LiFi and WiFi. 

The main key difference between LiFi and WiFi are listed below:

  • LiFi stands for light fidelity while in, WiFi stands for wireless fidelity.
  • LiFi coined by Prof  Harald has i2011, while WiFi is invented by CR corporation o 1991.
  • LiFi works based on the VLC principle, while WiFi consists of two important devices namely, WiFi router, or AP, WiFi dongle and WiFi stations.
  • LiFi transmits data using light y the help of LED bulbs, WiFi transmits data using radio waves using a WiFi router. 
  • LiFi presents an IrDA compliant device while in WiFi WLAN 802.11/b/g/n/ac/d standard-compliant devices.
  • Conversion distance in LiFi is around 10 meters but in conversion distance of WiFi about 32 meters. 
  • The data transfer speed of LiFi is about 1 Gbps, and the WiFi ranges from 150 Mbps to a maximum of 2 Gbps.
  • Frequency operation of LiFi 10000 time-frequency spectrum of the radio, but in WiFi 2.4 GHz, 4.9 GHz, and 5 GHz.
  • While in LiFi using light is blocked by the walls hence provide more secure data transfer but in WiFi, walls cannot lock radio waves so we need to employ more techniques to achieve secure data transfer.
  • The data density of LiFi works with a high dese environment while WiFi work in a less dense environment due to interference related issues.
  • Minimum components used in LiFi is LED blub, LED driver and photodetector, WiFi used router, modems, and access points.
  • LiFi is mainly used in airlines, undersea exploration, hospitals, offices,  home premises, etc but WiFi used for internet browsing with the help of a WiFi hotspot.

Full form of HiFi

What is the full form of HiFi?

  • High Fidelity

What does HiFi mean?

Some of the people who understand that HiFi has a connection with WiFi but HiFi is the word used for high-quality production. This term used mostly used listeners, home audiophiles, listeners of music with quality production. 

Features of LiFi

nowadays LiFi technology include is the latest technology, its advantages to the capacity, availability, speed, cost, energy efficiency, safety, the security of a wireless system with a number of key benefits over WiFi ut is inherently a complementary technology.

Some key features of LiFi technology are listed below:

  • LiFi technology provides 1k times with greater data density compared to that of WiFi.
  • It is two-way communications that use the medium of light.
  • LiFi light is present everywhere.
  • It is safe technology to transfer confidential manner.
  • It eliminates any health hazards caused by radio frequency (RF) waves.
  • The visible light spectrum is plentiful, free to use and unlicensed.
  • The diode called a photodiode, which is used as a receiver which can turn light into electrical signals.
  • The LiFi system would be of low cost as it requires less number of components.
  • No additional power input is required for this technology, moreover LED illumination is already efficient.
  • The use of light cannot interfere with any electronic circuitry and hence the technology is a safe ad on the hazard.
  • Haking is negligible compared to WiFi since the rage of data transmission is confined to a certain area.
  • RF transmission and propagation in water are extremely difficult but LiFi works well in this environment. 
  • Very high-speed data rates can be achieved due to low interference, high device bandwidth, and high-intensity optical output.
  • Require fewer components than radio technology.
  • Capacity for planning is simple since there tends to be illumination infrastructure where people wish to communicate, and also good signal capacity and strength can literally be seen.

Full form of GiFi

What is the full form of GiFi


  • Gigabit Fidelity

What does a GiFi mean?

In today the world is changing drastically. One of the biggest improvements made in wireless technology was inventing a new wireless technology called GiFi.

GiFi is a wireless transmission technology. This technology was ten times faster than other wireless technology. It is manufacturing using CMOS technology. The best part of GiFi technology is its power consumption. GiFi data transfer rate around the speed of 5 Gbps. The evolution of GiFi came into existence due to the need for higher data transfer rates and low power consumption.

Features of GiFi

GiFi stands for Gigabit wireless fidelity. This technology is a wireless technology, which is ten times faster than the other wireless technology. This technology chip delivers short rage multi-gigabit data transfer in an indoor environment. Now today's world fastest transmission transceiver integrated on a single chip that operates up to 60 GHz frequency band. GiFi has data transfer speed up to around too much high, 5 Gbps. Here this post gives some basic key features of GiFi technology to better understand this topic.

Some key features of  GiFi are listed below:

  • High speed of data transfer
  • Small size
  • GiFi technology is simple.
  • Quick deployment
  • Highly portable
  • High mobility
  • Provide a better coverage area
  • Low power consumption
  • High security
  • Cost-effective
  • Eliminating the cable
  • Low-cost chip
  • Better transfer rate
this technology eliminates the need for
cables to connect electronics devices, and connects all the
devices wirelessly in order to transmit the data
this technology eliminates the need for
cables to connect electronics devices, and connects all the
devices wirelessly in order to transmit the data
this technology eliminates the need for
cables to connect electronics devices, and connects all the
devices wirelessly in order to transmit the d

Application of GiFi

GiFi has given and it's conspicuous that more research should be done in the field of this new wireless technology and its applications.

Here some applications of GiFi are listed below:

  • It can connect your household things.
  • You can easily connect your smartphone to your HD television, PC, laptop, printers, etc
  • Efficient transfer of data from digital camcorders.
  • As the transfer data at high speed that made work very easy.
  • We can transfer the speed of Gbps.
  • The intelligent community uses it for high-security communications.
  • Easy and immediate construction of temporal broadcast networks such as in sports stadiums for the advertisement of information can be possible.
  • This technology can be effectively used in the inter-vehicle communication system. Adhoc information distribution with a point to point network extension.
  • The data exchange between vehicles is made possible by ad-hoc networks, MAC wireless PAN and many other applications.

Limitations of fuse

There are some limitations of fuse are listed below:
  • The heat produced by the arc may affect some of the associated switches.
  • Action is by melting of fuse so this could be rather slow in some situations.
  • During short circuit or sone overload in the circuit once fuse blows off replacing of fuse takes time. During this period the circuit lost power.
  • Need replacement when blows off by overcurrent.
  • It has a low speed.
  • You have to keep a replacement handy in case fuse is blows.
  • Fuse can't bear a surge current in the case of motor starting.
  • Fuse is not suitable for overloading.
  • Fuse has a low breaking capacity.
  • Fuse is not protected to the circuit against under-voltage.
  • It can be replaced by an oversized fuse by a novice to ensure it does not blow next time. This can damage the equipment it is supposed to protect.
  • The current-time characteristics of a fuse cannot always be correlated with that of some protected device.
  • When the fuse is connected in series it is difficult to discriminate the fuse has a significant size difference.
  • The protection of fuse is not reliable.
  • On the heavy some short circuit in the system, the discrimination between the fuses in series cannot be obtained unless there are considerable differences in the relative sizes of the fuses will be concerned.
  • Considerable time is lost in rewiring or replacing a fuse after the operation.

Difference between MCB and fuse

What is a fuse?

The most common overcurrent device is a fuse. A fuse is merely a small length of wire. Fuse is always placed on the phase wire.

What is MCB?

MCB called Miniature circuit breaker,  MCB is designed to operate on overload current and they can be used as protection devices for the individual circuit. MCB can also provide magnetic fault protection and short circuit protection.

 MCB can be changed over the switch needs to be pushed backed to the On position. While in the case of the fuse, the whole wire will have to be replaced first and there are also have some disadvantages of a fuse like it has low breaking capacity, and it has slow compared to other circuit breakers. So here this post gives information about several advantages of MCB over fuse or we can say that why we have to use MCB better than a fuse.

The main key difference between MCB and Fuse are given below:

  • As we know that relay is a switch, it is not usually meant to open under fault conditions and would likely fail if done so while in the fuse is a fault protection device. If a short circuit is developed, a large current will flow, and the fuse link will melt, causing the circuit to open.
  • All the relay is considered to be a fuse, but all the fuse are not considered as a relay.
  • A relay can be reset and put back into service after an overload but in the fuse needs to be replaced after every fault.
  • Fuse is mainly used for protection to our equipment so that when the high current passed through fuse more than its limit it will melt and protect our appliances but while in case of the relay it is used to accurate the high power appliance from the low power triggers. We can make fuse out of relay using a circuit but can do it in the fuses. 
  • A fuse protects from the overload and relay is a control device that uses a small amount of electrical current to control a larger amount or current.
  • Relay work with DC supply but in the fuse did not need DC supply.
  • A fuse is used for breaking the circuit while the relay is used for sensing purposes.
  • MCB is sensitive to vibration and movement, which can cause the switch to trip for reasons unrelated to an electricity overload, but in the fuse does not influence by vibration nor movement was secured in the fuse housing and was not rely on the switching mechanism as MCB.
  • MCB is costlier than the fuse unit system.
  • MCB, quick restoration is possible by just switching operation, resettable but infuse quick restoration of supply can not be possible because fuse must be replaced once blown.
  • Handling MCB is more electrically safe than a fuse.

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Fuse applications

Electrical fuses are one of the main components in almost all electrical and electronics circuits, and applications. Some of the few commonly known application of fuses are mention below.

Fuse is used in many industrial electrical as well as some electronics applications.
  • Hard disk drives
  • Laptops
  • Cameras
  • DVD writers
  • DVD players
  • Home electrical wiring
  • LCD monitors
  • Power transformer, capacitors, 
  • Power adapter
  • Motor starter
  • All electrical appliances(Air conditioners, TV, Music system)
  • Automotive systems
  • Distribution board
  • Portable electronics
  • Printer/scanners
  • Cell phones
  • All automobile(Car, bike, trucks, buses, motor, etc)
  • Battery packs
  • Gaming systems and portable electronics
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