T.K. Hareendran, Author at Codrey Electronics

Ultra-Sensitive Knock Sensor

July 15, 2019

Here’s the simple circuit of an ultra-sensitive knock sensor for microcontroller-based...

July 11, 2019

Arduino hardly needs an explanation! Arduino is an extremely flexible open source hardware platform...

July 9, 2019

Audio signal injector is a must to have little tool for troubleshooting audio circuits. Connecting...

July 8, 2019

This article explains how to play with the common geared dc motors widely used to drive small...

June 20, 2019

I have received numerous requests for a simple, cheap and entry-level ham radio world project and...

June 18, 2019

Aim of this article is to provide a simple circuit to drive EL (Electro Luminescent) components...

June 15, 2019

How to build a USB Mug Warmer? It’s easy if you have a little skill and patience! This...

June 14, 2019

A budding electronics hobbyist often needs to pick crystals of right frequency for homebrew...

June 10, 2019

In this article I’ll show you how to capture sound signals on the Arduino and start some...

June 8, 2019

Aroma burners/diffusers let the air around you deliver revitalizing and refreshing fragrance to...