WeMos® D1 mini – An Introduction
Recently, I got another packet from Banggood as usual from China warehouse. Inside the packet, there’s a WeMos® D1 mini module – this time its version 2.2.0. I’m happy to note that it’s still alive […]
Arduino Analog Sensor Reader
Hello everyone, today we’ll learn how to rig up a simple system to read and display the value of an analog sensor using Arduino and a seven-segment LED display (SSD) panel. The presented setup will […]
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, […]
Bluetooth Stereo Audio Adapter – DIY Intro & Review
Presented here is a shortcut to build your own bluetooth stereo audio adapter for listening ‘wire-free’ stereo music on the go! The one and only building block of this project is a Chinese bluetooth audio […]
Arduino OLED DVM
This article shows how to use an Arduino microcontroller (Uno/Nano) and an organic light emitting diode (OLED) display for making a basic digital voltmeter (DVM). The given design configuration makes it useful for measuring DC […]
Capacitor Colour Code Values with Examples
To use a capacitor in your electronic projects, understanding capacitor colour code is required. For identifying the capacitor values and tolerances international colour coding scheme (electronic colour coding) was introduced. Every capacitor has colors or […]
Rechargeable Power LED Torch
A few readers demanded to see one simple circuit of a rechargeable power white LED torch that can be charged through a regular electrical outlet. Alright, here’s the circuit diagram of a simple yet useful […]
Solar Sensor Wall Light Review & Teardown
I stumbled across this Chinese solar wall light last week in Amazon while searching for automatic LED street lights. Admittedly it’s not a good fit as a powerful street light but reasonably good for pathway […]