Reed switches are fascinating electromechanical devices that play a crucial role in various industries and applications. Reed switches are included in reed sensors or reed relays. The ferromagnetic circuit tongues move in relation to each other in the presence of an external magnetic field. This technology makes it possible to produce reliable, hermetically sealed switching elements with a small … [Read more...]
Archives for May 2024
What is Schmitt Trigger: Explained
We have mentioned the usage of Schmitt Trigger in our earlier article Read a Pushbutton with Arduino with Interrupts and Debounce. The Schmitt trigger, named after its inventor Otto Schmitt, who invented it in 1934 while still a student, is an electronic comparator circuit in which the switch-on and switch-off thresholds do not coincide, but are offset against each other by a certain voltage, the … [Read more...]
Read a Pushbutton with Arduino with Interrupts and Debounce
Pushbuttons are ubiquitous components used for user input in Arduino projects. However, reading pushbutton inputs reliably can be challenging due to issues such as contact bounce and the need for responsive behaviour. In this article, we'll explore how to read pushbutton inputs using interrupts and debounce techniques, ensuring accurate and responsive interaction with Arduino … [Read more...]
What is Joule Thief Circuit? How We Can Make Powerful LED Flashlights
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...]