@Nenad Dimitrovski

Fedora logo

Fedora - minimal installation of KDE Plasma environment

After a while, I will talk about Fedora again, because during the previous distro-hopping , Fedora generally left a positive impression on me. I may have been a little harsh to the Gnome environment, but in any case, this distro received a passing grade. Maybe even a C+! Between versions 34 and 35, I noticed significant improvements in the package manager, ie its speed. This text brings one more thing, and that is the bash script for installing Fedora with KDE Plasma environment and all the basic programs to use.

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Arduino microcontroller

Binary counter and shift register 74HG595

At first glance, with the Arduino UNO microcontroller (μcontroller) it can be concluded that the number of digital pins is insufficient for a more serious project. The Arduino Mega offers 54 digital pins, so you can consider purchasing such a microcontroller. Another solution that allows you to increase the number of pins is to use shift registers. In this case, we are talking about the shift register 74HC595. How this is achieved, how a scroll register works and how to use it with an Arduino UNO controller is the topic of this video tutorial and text.

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Arduino microcontroller

Seven-segment LED display

The seven-segment display (single-digit) is one of the electronic components intended for displaying numerical values (integers from 0 to 9). The designation of the component that will be used in the exercise is 5161AS.

What are segments? The seven-segment display consists of 8 LED elements, 7 are used to represent numerical values and 1 LED element is used to represent a decimal point. The segments are arranged in the shape of the number "8". By including precisely defined segments, it is possible to display any number from 0 to 9.

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Arduino microcontroller

Principle of operation of analog pins of Arudino Uno

The aim of this project is to get acquainted with the way of using the potentiometer, the operation of analog inputs and reading the values from the sensors (in this case the role of the sensor is played by the potentiometer). A theoretical explanation is given at the beginning of the video. In the following, we will see what it looks like when we read the voltage that we control with a potentiometer from the analog input of the Arduino, and how we use that voltage value to control the light intensity of the LED.

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Arduino microcontroller

The concept and application of "pull up" and "pull down" resistors

When using a microcontroller, when the pin we use as an input is not set to "HIGH" or "LOW" state, but its state "floats" between these two values, we say that it is in a state of high impedance. This is a condition that we definitely want to avoid because it leads to irregularities (unpredictability) in work and that is why we introduce a concept like"pull-up"and"pull-down"resistors. These are not special types of resistors, but resistors that allow us to maintain the desired state of the logic circuit regardless of the conditions. Arduino pin is connected via this resistor to a constant value, either to the + 5V power supply or to the GND (ground). In the first case it is a "pull-up", while in the second we are talking about a "pull-down" resistor.

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GNU Linux logo

Fedora 34 + Gnome 40 and why not to use it

During my occasional dystro-hopping, I had the opportunity to use Fedora after a long time with the new Gnome 40 version. Finely tuned operating system, with great support. It is often called the Red Hat test site, which is true. The community presented it with great enthusiasm, so I told myself to give it a go and that's how Fedora found herself on my machine.

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30th anniversary of the Linux kernel

The jubilee birthday of the Linux kernel comes and goes (August 25), a miracle that changed the course of development of modern OSes. I use the word "miracle" because that's how it turned out in the end. The project, which the creator Linus Torvalds himself did not believe would come to life, is a global phenomena today. It is located all around us, the simplest example is of course the smartphone with Android. We are talking about 1.6 billion devices at the heart of which is the Linux kernel. The kernel is part of the operating systems that run our desktop computers, mainframes, supercomputers ...

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Computer network

Networking two computers under Linux

I also dealt a little with this topic, I went into the administrator's waters and looked for a way to network two machines under (Arch) Linux in the simplest way, in order to easily transfer a bunch of data that I need from time to time, and what I allowed myself was fast backups. This is important because I am often do a little distro hopping. One thing is for sure, I always come back to Arch Linux!

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Arduino microcontroller

Night light - Arduino project

Time flows, and as it flows, I managed to force myself to make this video tutorial for ArduinoThis time the theme is a circuit that turns the night light on or off based on the brightness of the room. This is a nice thing, especially when there are small children in the house, so it is necessary for the light to be turned on at all times. Of course, there is also a modification of this circuit, so that it can be used for, say, street lighting. The positive aspects of such a project can be easily seen and enumerated.

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