Yash Kumar 
How does a fingerprint scanner work? The technology inside a smartphone. Think about it: there are over 8 billion people in the world. Yet, when you place your finger on your mobile’s fingerprint scanner, how does the phone—in just 0.2 seconds—know that the finger belongs to you and not someone else? And more importantly, if … Read more
How does an ATM work? How does your cash come out from inside Imagine it’s 2:00 AM. The streets are nearly empty. Suddenly, you have an urgent need for cash. The bank is closed, the cashier has gone home, and all you have is a small ATM card. You step into an ATM booth, insert … Read more
How does auto-brightness work? How does a smartphone screen automatically adjust its brightness Do you know? The topic of today’s explainer is—how does auto-brightness work? Consider this: you step out of a dark room directly into sunlight, and your phone screen instantly brightens. How is this everyday mystery actually solved? Are devices continuously using the … Read more
How to create your own Android OS? A complete roadmap for building a custom Android OS from AOSP You have likely used Samsung’s One UI, seen Xiaomi’s HyperOS, or operated OnePlus’s OxygenOS. When these companies launch new operating systems every year, it often feels like creating an Android OS is beyond the reach of an … Read more
How does a camera work? A complete guide from the lens to the digital image Cameras have become an integral part of our lives today. You pull out your smartphone, open the camera app, tap once, and the photo is ready—whether it’s a selfie, a Reel, or a family moment. But have you ever wondered … Read more
How does a speaker work? How is sound created from an electrical signal? Friends, listening to music has become so easy these days. You simply play a song on your mobile, turn on the TV, put in your earphones, or stand in front of a DJ speaker, and within seconds, music, dialogue, a voice from … Read more
How do LED and LCD TVs work? What is inside the TV Friends, from the outside, a slim TV mounted on a wall looks like nothing more than a screen and a frame. Yet, the moment you press a button on the remote, faces, colors, and a moving world appear on that very same black … Read more
How does a walkie-talkie work? How does sound travel such a long distance via radio waves Friends, imagine you are lost in a dense forest where there is absolutely no mobile network. Even though you have a phone, the call won’t go through. Suddenly, the walkie-talkie in your bag beeps and transmits your voice to … Read more
How does a printer work? How are photos and text printed on paper Friends, printers have become such a normal part of our lives today that we simply press the ‘print’ button on a mobile or computer, and within seconds, the content appears on paper. But have you ever really wondered what a printer actually … Read more
How does Bluetooth work? How does sound travel from your phone to your earbuds Just imagine: you play a song on your phone and slip it into your pocket, and it starts transmitting sound to your earbuds without any wires. No cables, no internet, and no visible signals—yet the music reaches your ears perfectly. But … Read more