General

Explanation of different terms used for computer hardware, computer software and in the Internet.

What is Asymmetric Cryptography?

Asymmetric cryptography or two-key cryptography is the cryptographic method that a pair uses of keys for sending messages. The two keys belong to the same person who will receive the message. One key is public and can be delivered to anyone, the other key is private and the owner must keep it so that no one has access to it. In addition, cryptographic methods guarantee that this key pair can only … [Read more...]

Traffic-Sign Recognition : Basics

Traffic-Sign Recognition (TSR) is a part of Advanced Driver-Assistance Systems (ADAS). Traffic-Sign Recognition (TSR) helps the vehicles to recognize the traffic signs on the road. The signs can be speed limit, school children, turn ahead, speed breaker and so on. The Traffic-Sign Recognition systems are increasingly being used for road traffic safety by helping the drivers by automatic alerts on … [Read more...]

What is Infrasound? How Human Reacts to Sub 20Hz Infrasound?

Sub 20Hz sounds are infrasound and commonly we need special electrical system to pick up the sounds of that range. Infrasounds are low frequency sound waves. They are both mechanical vibrations and acoustic oscillations. They are usually below the threshold of sounds perceptible to the human ear (between 0 Hz and 16 to 20 Hz approximately) At lower frequencies, for physiological reasons, they are … [Read more...]

ESP32 Arduino : What is SPI Flash File System (SPIFFS)

The SPI Flash File System or SPIFFS is a light-weight file system for microcontrollers with an SPI flash chip. A flash file system is designed for storing files on flash memory–based storage devices optimized for the particular system. SPI stands for Serial Peripheral Interface. Flash memory is a type of non-volatile storage that is electrically eraseable and rewriteable. Flash memory is a kind … [Read more...]

Kalman Filter to Stabilize Sensor Readings

Kalman Filter Commonly Used to Stabilize Sensor Readings. The Kalman filter reduces the errors of raw measurements, provides estimates for quantities. The Kalman filter is widely used in robotics, navigation, GPS, biomedical, electronic control circuits of ubiquitous communication systems such as radio and computer. It is a mathematical model which can be applied as a snippet. The Kalman filter is … [Read more...]

What is HTTP POST Method?

In some previous Arduino guide, we used HTTP POST method to upload sensor data. What is HTTP POST? HTTP POST is used to send data to a server to create or update a resource where the URL already existing. In the same way, we used HTTP GET with WordPress, HTTP PUT with OpenStack Swift. First, we need to understand what is HTTP POST, second we need to know basic difference with simillar methods such … [Read more...]

What is UART in Plain English?

We often face the phrase universal asynchronous receiver-transmitter in matters like serial communication of Arduino or some shield's of Arduino. What is UART in Plain English? UART is an electronic circuit used to implement digital serial interfaces of computer or peripheral devices. Serial transmission is commonly used for modems, non-networked communication between computers or peripherals. … [Read more...]

What Is a 7Z File? Work With 7Z File on CLI And SSH

Possibly many of the computer user know the process of archiving files is and how to reduce the size of a file. Even if the term 'file archiving' is not be familiar to some, the file types "TAR", “ZIP” and “RAR” are definitely known by every computer user. These formats have become the standard of archiving, providing a good level of compression and user-friendly interface. WinRar archiving … [Read more...]

Solve : Safari Running Slow on MacOS X

Give some time, please. Instead of finding some way faster and try, read this guide. These are normal problems to the high load users. Of course these gives huge pain, but investing an hour in cool head is better than searching the whole earth. If our methods fail, first ask on Apple Community pointing to this guide. Thereafter still you can not solve, it demands checking by an expert. Here is how … [Read more...]

Browser Based User Interface For Git Repositories

We commonly need a light option which opens a basic webpage on localhost. There are actually many browser based user interface for git repositories. Common reasons to avoid these are need of installation of too many packages, consumption of huge RAM etc. However, we are talking about quite basic option which is inbuilt present with git, too basic and another option which is slightly good looking … [Read more...]