IoT

Explore IoT tutorials and projects @Nenadsky.com. Learn about the latest IoT technologies, development techniques, and innovative applications

Exploring the ESP8266 OLED HW-364A: A Versatile Microcontroller for IoT Projects

Nenadsky
2025-07-132025-07-13
ESP32

Introduction

The ESP8266 OLED HW-364A is a compact yet powerful development board that merges the Wi-Fi capabilities of the ESP8266 microcontroller with the convenience of an integrated OLED display. This combination makes it an excellent choice for IoT applications, sensor monitoring, and embedded systems, where real-time data visualization and wireless connectivity are crucial.

Unlike bare ESP8266 modules, this board comes with a pre-soldered SSD1306 OLED screen, eliminating the need for additional wiring when you need a simple user interface. Whether you’re building a smart home device, a portable sensor logger, or a Wi-Fi-enabled display, this microcontroller provides an accessible and efficient solution.

In this article, we’ll take a closer look at its key features, how to set it up, and some practical project ideas to inspire your next build.

CNC Laser Engraver - DIY Arduino based project

From Old Computer to CNC Machine: My DIY Story with Arduino

Nenadsky
2025-04-242025-04-24
Arduino

The Initial Spark: Why I Decided to Build My Own CNC Machine

A love of technology and a desire to create something practical and functional from what others consider waste — that was my motivation to start my first DIY CNC project. With a modest budget, but with a lot of enthusiasm, I decided to build a miniature CNC machine using an Arduino controller and recycled parts from an old computer.

Arduino microcontroller and guides and video tutorials

Controlling Lightbulb: A Beginner’s Guide to Using Relays

Nenadsky
2024-12-122024-12-11
Arduino

Introduction to Relays and Arduino

Relays are electrically operated switches that allow low-voltage circuits to control higher-voltage devices. In the context of using Arduino, a popular microcontroller, relays serve as a crucial interface between the low voltage output of the Arduino and the high voltage required by lightbulbs. This capability is essential for projects that involve home automation or any applications requiring control over high-power devices while ensuring user safety and device integrity.

DIY Arduino Project: Room Occupancy Counter with 7-Segment Display

Nenadsky
2024-08-312024-08-31
Arduino

In this post, you’ll learn how to use a shift register (IC 74HC595) and a 7-segment display (model 5161AS) to track people entering and leaving a room. With these components and a few buttons, you’ll build a system that displays the current number of people in the room. Previously, I covered using the 7-segment display and shift register separately; now, I’ll show you how to combine them and add some cool effects to the display.

ESP32 Microcontroller: Master the Basics

Nenadsky
2024-02-082024-07-04
ESP32

Alright, let’s cut to the chase. You’ve heard the buzz about the ESP32 microcontroller, and you’re itching to get your hands dirty with it, right? Well, you’re in luck! We’re about to embark on a geeky adventure through the circuit basics, breaking down the nitty-gritty of this tiny yet mighty powerhouse. We’ll take a gander at what makes the ESP32 tick, its pinout that’s as vast as the ocean, and why it’s the go-to chip for hobbyists and pros alike. So buckle up, ’cause this ride’s going to be electrifying!

Learn Arduino with RGB Traffic Lights

Nenadsky
2024-01-022024-07-04
Arduino

This project, although simple, contains several elements essential for working with Arduino and in general with microcontrollers. In addition to working with the RGB diode, the project involves using the analogWrite function to work with (certain) digital pins. Using this function implies the use of PWM signals, and also includes usage of user functions.

Arduino Project: Access Granted Indicator

Nenadsky
2023-10-192024-07-04
Arduino

In the age of classic cameras and darkrooms, photography involved developing images in light-proof rooms using chemical mixtures. To ensure successful image development, preventing light from entering the darkroom was crucial. This project involves developing an electronic circuit to control the operation of two LEDs, indicating the darkroom’s availability.

Build an Arduino Ultrasonic Ranging Device

Nenadsky
2022-09-302024-06-30
Arduino

Measuring the distance between two objects is important when talking about the organization and planning of space. This project makes it possible to do it in a simple, easy and relatively inexpensive way using an Arduino and an ultrasonic sensor HC-SR04. The only limitation imposed by the application of this sensor is the maximum range of 4m. For the needs of a hobby project in the household, it can get the job done, and quite well.