In electronics, a joule thief is a discrete electronic circuit that transforms an electrical DC voltage into a higher electrical voltage. It represents a particularly simple and compact implementation of a resonance transducer. The phrase Joule thief is a pun of the jewel thief and is intended to make it clear that the circuit squeezes ("steals") the last remnant of electrical energy from a … [Read more...]
Service vs. Systemctl in Linux
In the world of Linux system administration, managing processes is a fundamental task. Two common tools for handling services are service and systemctl. Both serve similar purposes, yet they differ in their usage, features, and underlying mechanisms. Understanding the distinctions between these tools is crucial for efficiently managing services in a Linux environment. systemd gives us the … [Read more...]
Banana Plugs: A Comprehensive Guide
A banana plug is a round pin with a contact spring for laboratory, measuring instruments and experiments. It is part of a low-voltage connector system and usually fits into a rigid socket (banana socket) with a diameter of 4 mm. The plug sits securely thanks to its spring, but can be easily removed without tools. The current carrying capacity is up to about 32 amps. Banana plugs are ubiquitous … [Read more...]
Mainnet Vs. Testnet – What are the Differences?
In the world of blockchain technology, mainnet and testnet are two terms commonly encountered. Both serve distinct purposes in the development, testing, and deployment of decentralized applications (DApps) and blockchain networks. Understanding the differences between mainnet and testnet is essential for blockchain developers, enthusiasts, and users alike. This article aims to elucidate the … [Read more...]
Arduino 3V DC Mini Pump with Push Button Control and LED Indicators (For Kids)
Here's an Arduino sketch to control a 3V DC pump using a push button to start and stop the pump. Additionally, it includes two indicators (green and red LEDs) to signify the status of the pump (running or stopped). This project is intended for the kids, however parents will be required to help them. Although the project is the kids, the sketch includes the usage of Arduino Interrupt. We have … [Read more...]
Linux Package Formats: A Comprehensive Overview
Linux, renowned for its versatility and customizability, offers various package formats to streamline software distribution and installation across different distributions. These package formats, each with its unique features and advantages, are pivotal in the Linux ecosystem. In this article, we delve into the intricacies of Linux package formats, exploring their significance, differences, and … [Read more...]
Fix: “E: Unable to Locate Package” Error in Linux
Encountering the "E: Unable to Locate Package" error message in a Linux terminal can be frustrating, especially when trying to install software or dependencies specially in Ubuntu. This error indicates that the package manager, such as apt (or may be yum), cannot find the requested package in its repositories. In this comprehensive guide, we'll explore the possible causes of this error and provide … [Read more...]
Fix: sudo: command not found Error
Encountering the "sudo: command not found" error can be frustrating, especially when you're trying to perform administrative tasks on a Linux server. This error indicates that the system is unable to locate the sudo command, which is essential for executing commands with superuser privileges. Fortunately, there are several troubleshooting steps and solutions to resolve this issue and regain access … [Read more...]
What is Motion JPEG (MJPEG) Video Codec
Motion JPEG (MJPEG) is a video codec in which each frame is compressed separately as a JPEG image. It is a video compression format that has been widely used in various applications for many years. Unlike traditional video codecs that compress entire frames, M-JPEG compresses each frame of a video sequence individually as a series of JPEG images. This approach offers certain advantages and … [Read more...]
How Gyroscope Works? Explained
Gyroscopes are fascinating devices that play a crucial role in various applications, from stabilizing spacecraft to enabling motion sensing in smartphones. Their ability to maintain orientation and detect angular velocity makes them indispensable in navigation, robotics, and aerospace. Currently, the term gyro and gyroscope are used figuratively for a variety of gyro sensors that do not contain … [Read more...]
How Accelerometers Work? Explained
Accelerometers are a fundamental component of motion sensing technology, serving as the backbone for various applications ranging from smartphones to automotive safety systems. These devices measure acceleration forces, allowing them to detect changes in velocity, orientation, and vibration across multiple axes. This is usually done by determining the inertial force acting on a test mass. This … [Read more...]