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268 articles written by T.K. Hareendran

Author: T.K. Hareendran

About: Internationally Certified Freelance Technical Author/Circuit Designer Electronics Engineering Technologist Founder & Promoter of TechNode» PROTOLABZ – An Open Source Hardware R&D Lab Tel: +91 (0) 9447712139 Email: designlab.technode@gmail.com

Website: http://technodeprotolabz.blogspot.in/

2 hardware_setup

Arduino Melody Shaper

T.K. Hareendran - 02/11/2017

This tutorial will show you how to use the Arduino to play your most-loved tunes. The steps are [...]
EMFD-2

Simple EMF Detector/Meter

T.K. Hareendran - 02/09/2017

I recently built a simple electromagnetic field (EMF) detector based on a code by Christian Figge that I [...]
1-System View

UV Sterilizer for Aquarium

T.K. Hareendran - 02/07/2017

Ultraviolet (UV) Sterilizers are used to control infections by stopping the spread of microorganisms from one fish to [...]
2. Circuit Diagram

Simple Delta Wave Generator

T.K. Hareendran - 02/06/2017

A delta wave, also known as delta rhythm, is the normal brainwave in the encephalogram of a person [...]

Inexpensive DIY Gauss Meter Project

T.K. Hareendran - 12/02/2016

Gauss meters are expensive devices and are typically not within reach of the average electronics hobbyist. Presented here [...]
Emulator Circuit

Mobile Phone Battery Emulator

T.K. Hareendran - 12/01/2016

Recently, a mobile phone service technician wanted me to build a battery emulator that would enable him to [...]
schematic basic

Sine Wave Generator Circuit

T.K. Hareendran - 11/30/2016

According to textbooks, a sine wave is a wave whose form resembles a sine curve. Often in power [...]
Inverter Schematic

Portable Power Inverter Circuit

T.K. Hareendran - 11/29/2016

Recently, my neighbor expressed a deep interest in building a low-power inverter from scratch. This portable power inverter [...]

Wireless LED Bulb

T.K. Hareendran - 10/31/2016

Researchers predict that wireless power will make a significant contribution to energy supplies in the near future. The [...]
smoke system for electric aircraft

Desktop Smoke Generator

T.K. Hareendran - 10/13/2016

I recently decided to do some research on electric smoke generators and was surprised to learn that ready-made [...]