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 […]
Electric Aroma Burner/Diffuser
Aroma burners/diffusers let the air around you deliver revitalizing and refreshing fragrance to your home/office interiors. This article guides you through the simple process of making your own electric aroma burner/diffuser. Gathering requisite components First […]
Generic 2A USB Car Charger – DIY
This time I’m going to show you how to build an inexpensive yet very useful generic 2A USB car charger for smartphones and tablets using off-the-shelf parts. What you can see here is a simplest […]
Simple Neon Glow Bulb Tester
Neon glow bulb is a nostalgic decorate lamp everybody seems to love. A small version is used still mainly as neon indicator light, also called pilot light, in electric/electronic instruments and appliances as a neon […]
Poor man’s Door Video Security Camera
This article describes a basic idea that can be used to build your own simple video security systems such as a door video security camera. In these times you can buy astonishingly cheap Car Rear-View […]
DTDC Switch for Outdoor/Street Lamp
Recently many readers demanded a simple automatic dusk-to-dawn controller (DTDC) electric switch circuit for real world outdoor/street lighting applications. I looked all the day and finally designed and built this little circuit based on easily […]
Arduino Power-Down & Auto-Save
Perhaps you will try tomorrow one microcontroller experiment that can store variable data in its EEPROM (electrically erasable programmable read only memory). Presented here is an idea to use inbuilt EEPROM of Arduino to save […]
DFR Turbidity Sensor Review & Thoughts
Turbidity sensors are widely used to measure the amount of suspended particles (turbidity) of the wash water in washing machines and dishwashers. In principle, turbidity sensor consists of an optical diode and optical transistor and […]
Jog LED Marker Light
If you’re looking for the circuit of a running / jogging light up wristband, here’s a tried and tested design without a microcontroller. Even though the design presented here is based on traditional (leaded) components, […]