Aswinth Raj

An Engineer's Introduction to Electric Vehicles (EVs)

According to a forecast by International Energy Agency, the use of Electric Vehicles will grow from 3 million to 125 million by...

Digital Compass using Arduino and HMC5883L Magnetometer

Human brain is built of complex layer of structures which helps us to be a dominant species on earth. For example the...

ESP32 BLE Client – Connecting to Fitness Band to Trigger a Bulb

How cool it be to turn on the lights automatically as soon as you enter in your home and turn it off again when you leave! Yes...

Generating PWM signals on GPIO pins of PIC Microcontroller

PWM signal generation is a vital tool in every embedded engineers arsenal, they come in very handy for lot of applications like...

ESP32 BLE Server - GATT Service for Battery Level Indication

Wireless Headphones, Fitness bands, Bluetooth Speakers, In-Ear headphones, Mobile phones, Laptops... there are so many...

How to Use Serial Bluetooth in ESP32

Bluetooth modules like HC-05 and HC-06 are easy to set-up and quick to use with Arduino IDE, but they have their own limitation...

Programming ESP32 Board with Arduino IDE

Note: This tutorial was written after Arduino has officially launched its support for ESP32 boards. So if you have followed the...

How to make an Electromagnetic Coil Gun

Coil Gun, as many people think (including me) is not just a fun toy with a tube and few coils around it which can shoot...

Smart Phone Controlled Arduino Mood Light with Alarm

I recently purchased the Neo Pixel LED strip and was quite impressed by the way it works. The tiny LED’s have an inbuilt driver...

What is Stepper Motor and How it Works

From a simple DVD player or printer in your home to a highly sophisticated CNC machine or Robotic Arm, Stepper motors are to be...