Little LED Marker Light DIY
Inspired by some commercial automotive side marker lights, I recently built a general purpose 3-LED flashing marker light. It can be used as an attention light in and around your home, especially at night. So, […]
Steady Hand Game – STEM
Steady Hand Game, also known as Buzz Wire Loop Game is a tabletop game which involves guiding a metal ring (the wand) along a serpentine length of bare wire (the loop) without touching the wand […]
Simple Arduino Psychedelic Lamp
The biggest attraction in most discotheques is the colourful strobe lights which are often synchronised to the rocking music. Another interesting gimmick is the psychedelic light system which enlivens things up a bit by flashing […]
Qi Wireless Chargers & Funny LED Toys
I have been experimenting with wireless charging for a few years now, including building some fun projects with readymade Qi wireless chargers and wireless charging modules! I think you also know that it is pretty […]
Multipurpose LED Flashlight Teardown
So here is an out-of-warranty Pigeon Multipurpose LED Flashlight that just suddenly stopped working so I figured why not take a crack at it. I bought it on discount sale from an Indian online store […]
Arduino Stepper Motor – A Quick Revision
After seeing an inspiring post on a website about making a simple automatic pet feeder using a cheap stepper motor, I decided to re-do some trivial experiments with it. For that I chose the very […]
Relay & Electronics – A Quick Refresher
In this short post we will again take a nimble look at electromagnetic relays and the electronics associated with them. As we all know, an electromagnetic relay is a simple electromechanical switching device that uses […]
Little Noise Makers – A Quick Revision
I have already outlined many times here how to build very simple noise makers or noise generators. Also, there are many more outside this space, here is a randomly picked project example Arduino White Noise. […]
Programmable Gain Amplifier (PGA) – Random Talks
A programmable gain amplifier (PGA) is an electronic amplifier, typically based on an operational amplifier (op amp), whose gain can be changed by external control signals. Recently, I have been thinking about a basic programmable gain amplifier that can be quickly […]
Simple CMOS Bilateral Switch
This little post is to refresh your knowledge about the far-famed CD4066B CMOS Quad Bilateral Switch IC. The CD4066B is a quad bilateral switch intended for the transmission or multiplexing of analog or digital signals. […]