Nilanjan Roy

DIY Electromagnetic Levitation Device

This Electromagnetic levitation device is a cool to build an anti-gravity project that is exciting and interesting to watch....

Simple Ultrasonic Acoustic Levitation using Arduino and HCSR04 Ultrasonic Sensor

It is very exciting to see something floating in the air or free space that is exactly what an anti-gravity project is about....

AC Lights Flashing and Blink Control Circuit Using 555 Timer and TRIAC

Sometimes, we might need an AC bulb flasher circuit that can blink a series of bulbs in a particular time interval for...

Stereo Audio Pre-Amplifier Circuit with Bass and Treble Control using Transistors

Often times, we need to control bass, treble, and volume of our audio signal before passing it through amplification stages to...

High Power LA4440 Double IC Stereo Audio Amplifier with Bass and Treble Control

The LA4440 is a very popular dual-channel audio amplifier commonly used to build high power audio amplifiers. The IC is known...

Digital Keypad Security Door Lock using Arduino

Often times, we need to secure a room at our home or office (perhaps a secret dexter’s laboratory) so that no one can access...

Build your own Wi-Fi Repeater or Range extender using NodeMCU to connect all your IoT Devices

We are in the Internet of Things (IoT) generation! These days, you can control your home gadgets/devices like air-conditioner,...

Long Range Arduino Based Walkie Talkie using nRF24L01

We are living in the era of 5G and 5G-enabled devices; however, old technologies like the walkie-talkie system and RF...