This article is work in progress. Likely will be till may. Motivation to use P type logic level MOSFET as a voltage controlled switch or latch are the following applications: to shut down s...

How removing CMOS battery can bring PC back to life This weekend, I faced every tech enthusiast’s nightmare. Over the weekend, I updated my home server, made all regular backups, copied them to an...

This cheat sheet provides a quick reference guide for working with Podman, a container runtime similar to Docker. Whether you’re new to containers or already familiar with Docker, this guide will h...

Intro What are suitable batteries for powering Arduino or microcontrollers in general? Hopefully, Arduino (or rather ATmega328P controller) can be powered by basically anything between 1.8 and ...

Motivation I decided to explore power consumption of Arduino Pro Mini and use sleep mode to get power consumption as low as possible so data logger can be powered from battery. I had some notes fr...

Introduction In this article, we’ll explore how (not) to build a simple data logger using an Arduino board, a BME280 sensor, a DS3231 Real-Time Clock (RTC) module, and an external EEPROM chip. T...

Introduction This supposed to be short article 🤯🤕 In this article, we’ll explore how to read and write data to an external EEPROM (Electrically Erasable Programmable Read-Only Memory) chip using ...

Intro Data logging is a critical process in many fields, from environmental monitoring to scientific research and industrial applications. At the core of any data logging system is the ability to ...

Introduction The Nokia 5110 LCD (PCD8544) is a compact and affordable monochrome display that has become a popular choice for hobbyists and makers working with microcontrollers like the Raspberry ...

Introduction Spring is here and with it comes Pi day! Best time to try a new microcontroller: Raspberry Pi Pico 🙂 I want to evaluate this against Arduino in the future and possibly make one E-i...

Introduction Environmental sensors are crucial components in many Arduino projects aimed at monitoring and gathering data about surrounding conditions. This guide focuses on these specific sensor...

Introduction What is Arduino Arduino is an open-source electronics platform based on easy-to-use hardware and software. It consists of a microcontroller board and an Integrated Development Enviro...

Motivation When working with image transformations, particularly in the context of keypoint detection and matching in computer vision, determining the precise center of rotation can be pivotal. Th...

Introduction Starting with simple examples and moving towards more complex ones is a widely accepted teaching method. However, I consider this approach to be somewhat redundant for our purposes, a...

Introduction This article aims to organize and share observations from my collection of Logarex slide rules. There are two valuable resources in Czech on this topic, other than online auctions (au...