By T.K. Hareendran

International Electronic Design Freelancer • Technical Author • Hardware βeta Tester • Product Reviewer
Articles Written 466

Learn To Play with Ceramic Resonators

As Wikipedia says, a ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or three metal electrodes attached. Like the similar quartz crystal, when connected in an […]

Tricolor LED Signal Baton

An LED signal baton (also called marshalling torch) is a proven gadget to head traffic. Primarily it is widely used by traffic police, attendants etc. to channelize traffic but it is a great handy aid […]

Multipurpose Power-Thrifty LED Flasher

Sometimes you may need to make a battery-operated lamp flasher suitable for a variety of applications. In this post you will see the design concept of a 555 timer based multipurpose LED flasher that requires […]

Universal Pulse Extender Module

On certain occasions it is necessary to use a sensor module that generates a relatively short pulse to indicate a change of status. If the duration of its output signal is too short, the associated […]

Raspberry Pi Pico W Quick Starter

Raspberry Pi Pico W is another Raspberry Pi Pico but features Wi-Fi letting you to connect the device to a Wi-Fi network. In this quick starter post, you will learn how to start with a […]

True RMS & RMS – A Quick Refresher

This little post is a quick rescript of RMS and TRMS. As you know, this is not a popular or frequently discussed topic. So, let us jump in! RMS and TRMS RMS stands for Root […]

Automatic Aroma Diffuser (v2)

Last week the prime goal was to revise my design thoughts on automatic aroma diffuser and make a bit amended version for a distant client, again using a bunch of readily available inexpensive components. I […]

Universal RADAR Motion Detector

There are a lot of different parts in the electronics world, and often parts with the same functionality come indifferent forms and sizes. Now it is the time to pick another cheapo microwave motion sensor […]