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 […]
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, […]
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 […]
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 […]
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 […]
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 […]
If you are an active cyclist you must become more aware of safety and in particular your visibility to other riders, especially in winter and monsoon seasons. One drawback of your (pleasantly cheap) dynamo lighting […]
Here’s a little audio amplifier project you can build from inexpensive and easily available parts. You can use this monaural audio amplifier even in any robotic project where you need to amplify audio signals. The […]
Lithium-ion (Li-ion) battery have cemented its position as the primary power source for portable electronics. One of the key benefits of a lithium-ion battery is that it have high energy density without being too bulky. […]
The RGB LED module shown in the above image is a very popular generic RGB LED module available in the market. There are mainly two variants of this module having common-cathode (CC) and common-anode (CA) […]
