MORNSUN® B0505S-1W Review
Recently when I was developing a digital light controller project, I wanted to have the interface isolated from the common ground to avoid spurious noise and other issues. Since I didn’t have a quick solution […]
Ultra-Sensitive Knock Sensor
Here’s the simple circuit of an ultra-sensitive knock sensor for microcontroller-based electronics projects. It’s in fact a piezo knock sensor monitor based on a single transistor, and designed carefully to work with 5V (or 3.3V) […]
Adaptable Sensors & Arduino
Arduino hardly needs an explanation! Arduino is an extremely flexible open source hardware platform that can be used for countless do-it-yourself electronic projects. It’s very easy to get started with Arduino projects, but if you […]
Audio Signal Injector
Audio signal injector is a must to have little tool for troubleshooting audio circuits. Connecting the audio signal injector to the circuit under test you should be able to hear its tone in the speaker […]
DC Gear Motor Primer
This article explains how to play with the common geared dc motors widely used to drive small robots and simple actuators. Geared dc motor is in fact an ordinary dc motor but with plastic or […]
Morse Code Practice Oscillator
I have received numerous requests for a simple, cheap and entry-level ham radio world project and the result is this do-it-yourself Morse Code Practice Oscillator usually called simply as Code Practice Oscillator (CPO). This project […]
EL Wire Lamp Driver/Inverter
Aim of this article is to provide a simple circuit to drive EL (Electro Luminescent) components. The minuscule driver design you can find here will render decent power to lights up a few feet of […]
USB Mug Warmer
How to build a USB Mug Warmer? It’s easy if you have a little skill and patience! This article will help you to build your own USB mug warmer using inexpensive components laying around your […]
Simple Crystal Tester
A budding electronics hobbyist often needs to pick crystals of right frequency for homebrew projects. To make that task a little more cheerful, I’m introducing this simple crystal tester circuit. It’s basically just a very […]
Arduino Sound Analyzer Primer
In this article I’ll show you how to capture sound signals on the Arduino and start some interesting experiments on it. Look for and gather a sound sensor module For the experiment initially you need […]