LED Strobe Light DIY
Nothing mattering to see a circuit turning light emitting diodes (LEDs) on and off. If for certain applications, brightness of the LEDs could be adjusted in a continuous manner, with a simple dimmer circuit you […]
Solid State Relay (SSR) Primer
Nowadays solid state relays (SSRs) can be found in almost every online electronics store, and SSRs are certainly the most ‘silent’ relays available. However, I would like to point out at first that SSRs are […]
Lifting Electromagnet – DIY
The quick way to build an electromagnet based project is to buy one lifting electromagnet with enough lifting and holding power to fulfill the design requirements. Such compact and powerful lifting electromagnets in various shapes […]
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) […]
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 […]
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 […]