IoT

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Arduino microcontroller and guides and video tutorials

Understanding Pull-Up and Pull-Down Resistors

Nenadsky
2021-10-282024-06-28
Arduino

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.

DIY Arduino Night Light: Easy Step-by-Step Project

Nenadsky
2021-07-282024-06-28
Arduino

Time flows, and as it flows, I managed to force myself to make this video tutorial for Arduino. This 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.

Hello Arduino World: Flashing LED Tutorial

Nenadsky
2021-07-092025-08-17
Arduino

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 blog one 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!