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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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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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Arduino microcontroller

Hello (Arduino) world - flashing LED

Some time ago, I started to discover a new area in programming and electronics, it's about the Internet of Things, a little more precisely about microprocessors and microcontrollers. As I announced in the first text on the blogone of my target areas is Arduino and it's time for the first post! This text is different from the others, this time in addition to the text, video material for the first project is included, something like "Hello world!" - flashing LED. I follow trends a bit, or at least try, but I definitely enjoy doing this!

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JavaScript, PHP

Forgotten password reset functionality

For all existing web services that require user profiles, one of the unavoidable functionalities is the reset of the forgotten password. Thus, Chat App - Web Application must also provide this option for users who have forgoten their password. Another reason why this option is needed is definitely security. Somewhere it is recommendation, and somewhere is an obligation to periodically change passwords precisely in order to maintain the level of security of both the account and the application itself, ie in the general sense of the system we use.

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JavaScript, PHP

JavaSrcipt - Smooth scrolling tutorial

The previous post for most of you belongs to the "news from the margin" domain, for me it is one of the possibilities that works very well. But now I will deal with another tangible topic, and it is related to JavaScript. As I mentioned, JavaScript is a new area for me, but it occupied almost all of my attention in a short time. Wanting to become a better programmer, and as I walk the path of a Web developer, I realized that knowing Frontendand Backend Backendwas essential

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manifesto

Retrospective and new manifesto

Welcome to all of you who have taken some time to read this text and who will be coming back to read my posts! After a little over 10 years, I decided to start writing again and get my blog back. In short, my journey as a blogger started on Blogger, only to soon move to a standalone domain. It lasted about 3 years, after which i lost my creative edge and interest.

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