Sunday, July 26, 2020
How do optical mouse woks??
Optical mouse works by
using a tiny low-resolution video camera (embedded in a sensor) to
take successive images of the surface on which the mouse operates. It uses an
LED (light-emitting diode) which illuminates red light (generally) onto the
surface underneath which is reflected back and fine-tuned before getting picked
up by the sensor. A plastic lens collects the reflected light and forms an
image on a sensor.
If you were to look at the image, it would be a black-and-white picture of a tiny section of the surface. The sensor continuously takes pictures as the mouse moves. The sensor takes pictures quickly—1500 pictures (frames) per second or more—fast enough so that sequential pictures overlap.
The rest of the work
is taken care by the Optical Navigation engine. Through a patented
image-processing algorithm, the optical navigation engine identifies common
features between the captured frames and determines the distance between them.
This information is then translated into X and Y coordinates to indicate mouse
movement.
Saturday, July 25, 2020
Learn how to make a temporary e-mail for free
How solid state drive work (SSD)
Now a days every pc owner are buying SSD and replacing HDD,s. SO, in this article we are going to tell you how do SSD's work and there uses.
What is a SSD
A SSD stands for "Solid State Drive." A SSD is a type of mass storage device similar to a hard disk drive (HDD). It supports reading and writing data and maintains stored data in a permanent state even without power. Internal SSDs connect to a computer like a hard drive, using standard IDE or SATA connections.
While SSDs serve the same function as hard drives, their internal components are much different. Unlike hard drives, SSDs do not have any moving parts (which is why they are called solid state drives). Instead of storing data on magnetic platters, SSDs store data using flash memory. Since SSDs have no moving parts, they don't have to "spin up" while in a sleep state and they don't need to move a drive head to different parts of the drive to access data. Therefore, SSDs can access data faster than HDDs.
SSDs have several other advantages over hard drives as well. For example, the read performance of a hard drive declines when data gets fragmented, or split up into multiple locations on the disk. The read performance of an SSD does not diminish based on where data is stored on the drive. Therefore defragmenting an SSD is not necessary. Since SSDs do not store data magnetically, they are not susceptible to data loss due to strong magnetic fields in close proximity to the drive. Additionally, since SSDs have no moving parts, there is far less chance of a mechanical breakdown. SSDs are also lighter, quieter, and use less power than hard drives. This is why SSDs have become a popular choice for laptop computers.
We hope this article was helpful for you to under stand how SSDs work.
How do Hard Drives(HDD) works?
How does a HDD physically store info?
Inside the casing there are a series of disk-like objects referred to as “platters”.
The CPU and motherboard use software to tell what’s called the “Read/Write Head” where to move on the platter and where it then provides an electrical charge to a “sector” on the platter. Each sector is an isolated part of the disk containing thousands of subdivisions all capable of accepting a magnetic charge. Newer HDDs have a sector size of 4096 bytes or 32768 bits; Each bit’s magnetic charge translates to a binary 1 or 0 of data. Repeat this stage and eventually you have a string of bits which when read back can give the CPU instructions, whether it be updating your operating system, or opening your saved document in Microsoft Word.
As the HDDs have been developed, one key factor that has changed is the orientation of the sectors on the platter. Hard Drives were first designed for “Longitudinal Recording” – meaning the longer side of the platter is oriented horizontally – and since then have utilized a different method called “Perpendicular Recording” where the sectors are stacked on end. This change was made as hard drive manufacturers were hitting a limit on how small they could make each sector due to the “Superparamagnetic Effect.” Essentially, the superparamagnetic effect means that hard drive sectors smaller than a certain size will flip magnetic charge randomly based on temperature. This phenomenon would result in inaccurate data storage, especially given the heat that an operating hard drive emits.
But, there is one downside to Perpendicular Recording, that is increased sensitivity to magnetic fields and read error, creating a necessity for more accurate Read/Write arms.
WE hope this information was beneficial for you to understand how do HDD's work.
Sunday, July 14, 2019
Learn How to identify virus in a file or url
To do so you have to go to the following site
https://www.virustotal.com/gui/home/upload
In this website u can check for virus by uploading file or by url. After uploading your file/url click on reanalyse and all done with in few seconds you can see whether the virus is there or not.
STEP 1-visit the website
STEP 2- upload file/url
Wednesday, May 29, 2019
Trick to make a fake virus!!
this DOES NOT delete your files
txt tutorial:
1.Open WordPad. (it shouldn't matter if its notepad or WordPad)
2.Copy and paste the code below. (after all of the "echo's, u can write whatever u want.)
[u can also delete some of the "dir/s's to reduce how long the "deleting" portion takes.
3.Add ".bat" at the end of the name of the file when u save it.
and change the file type to "Text Document - MS-DOS Format".
4.Make a shortcut for it on the desktop by right-clicking on the file and click "create shortcut.
5.In the shortcut tab, click on "change icon and find an icon to a program that they use a lot.
6.In options tab, change it to full-screen.
in colors, change the screen text to white and the screen background to dark blue.
(the blue further to the left)
have fun!
Here’s the code
@echo off
echo
echo WARNING! A VIRUS HAS BEEN DETECTED ON YOUR COMPUTER!
pause
echo FILE RECOGNIZED AS SISDPYGnfg32.bat
pause
echo CONTACTING ANTIVIRUS
pause
echo WOULD YOU LIKE TO DELETE THE VIRUS? (y/n)
pause
echo ANTIVIRUS HAS BEEN MANUALLY SHUT DOWN!
pause
echo VIRUS HAS PROGRESSED TO C:/ DRIVE!
pause
echo FILES IN C:/ WILL BE DELETED!
pause
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
echo PRESS ANY KEY TO PREVENT FILE DELETION!
pause
echo FILES IN C:/ DRIVE ARE BEING DELETED!
pause
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echo
pause
echo JUST KIDDING! NOTHING HAS BEEN DELETED
pause
echo
echo DON'T BE MAD AT ME...
pause
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