DEV Community: TechDcoded

How AI Trading Bots Work: The Tech Explained

TechDcoded — Sun, 27 Sep 2026 07:06:23 +0000

Imagine sitting in a bustling café in Bengaluru or Mumbai, tracking your favorite stock on your smartphone. You tap a button to buy, and the transaction is completed in a second. But behind that simple screen lies a massive, silent digital machinery operating at speeds we can barely comprehend. Today, a significant portion of stock market transactions are not placed by human hands at all. Instead, they are handled by autonomous software programs.

If you have ever wondered how AI trading bots work, you are looking at one of the most sophisticated intersections of software engineering, data science, and finance. These systems do not just follow simple instructions; they analyze, learn, and execute complex multi-step strategies on their own. Let's lift the hood and decode the engineering, data pipelines, and decision engines that power these modern financial agents.

Key takeaways

Modern AI trading bots function as autonomous "AI agents" that dynamically adapt to market conditions rather than following rigid "if-then" rules.
The pipeline begins with real-time data ingestion, which processes both structured market feeds and unstructured alternative data like financial news.
A dedicated software layer called the "agent harness" acts as the bot's cockpit, managing its memory, prompts, and secure API connections.
Strict security and compliance layers enforce hard risk limits, such as stop-losses and wash trading blocks, before any order is sent to an exchange.
In India, algorithmic trading accounts for 50% to 60% of the total turnover on the National Stock Exchange (NSE), strictly regulated by SEBI.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How AI Trading Bots Work: The Tech Explained

Originally published at techdcoded.com.

How Do Noise-Cancelling Headphones Work? The Science Explained

TechDcoded — Sat, 26 Sep 2026 07:34:44 +0000

Put on a pair of modern over-ear headphones, flip a switch, and the rumbling roar of an airplane cabin or a bustling city street instantly vanishes. It feels like magic, as if a volume knob on the entire universe has been quietly turned down. But there is no magic involved—just clever physics, fast digital microchips, and a neat trick involving sound waves.

To understand how noise-cancelling headphones work, you do not need an engineering degree. You just need to understand what sound actually is, how waves can fight each other, and how tiny computers running inside your headphones can predict the future by a fraction of a millisecond.

Key takeaways

Active Noise Cancellation (ANC) uses microphones, amplifiers, and digital signal processing to eliminate sound electronically.
The headphones generate an inverse wave that sits 180 degrees out of phase with incoming noise.
This technology is most effective at blocking steady, low-frequency sounds like airplane engines and train rumbles.
High-pitched or sudden erratic noises like a crying baby or a sharp siren are much harder to cancel completely.
Modern wireless earbuds and over-ear headphones combine both passive padding and active electronic cancellation for the best results.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How Do Noise-Cancelling Headphones Work? The Science Explained

Originally published at techdcoded.com.

Can Technology Stop Earthquakes? The Engineering Truth

TechDcoded — Sat, 26 Sep 2026 06:33:34 +0000

When the ground beneath a city starts to violently shake, it triggers a primal fear. We look at towering skyscrapers and sprawling concrete jungles and wonder how anything could possibly survive nature's raw fury. Naturally, this leads many to ask a big question: can technology stop earthquakes?

The short answer is a flat no. Earthquakes are driven by massive tectonic plate movements involving enormous amounts of energy originating miles beneath the earth's crust. This subterranean activity is completely beyond human intervention or control. We cannot switch off a fault line or prevent tectonic plates from shifting.

However, just because we cannot stop earthquakes does not mean we are entirely helpless. While we cannot control the earth beneath our feet, we can fundamentally change how our buildings interact with it. This is where structural engineering steps in. Instead of stopping seismic events, engineers focus on mitigating damage, managing seismic energy, and preventing catastrophic structural collapse to protect human lives.

Key takeaways

Earthquakes generate massive horizontal forces that traditional rigid buildings cannot handle without cracking or collapsing.
Modern seismic engineering shifts the design philosophy from rigid strength to flexible survival and energy dissipation.
Base isolation systems place flexible bearings beneath buildings to let the ground move independently from the structure above.
Seismic dampers and cross-bracing absorb rapid back-and-forth shaking, converting destructive kinetic energy into harmless heat.
Global and Indian infrastructure increasingly uses advanced seismic bearings and strict building codes to minimize disaster risks.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: Can Technology Stop Earthquakes? The Engineering Truth

Originally published at techdcoded.com.

How Phone Sensors Track Your Steps: The Tech Inside

TechDcoded — Fri, 25 Sep 2026 06:54:44 +0000

Have you ever wondered how your smartphone instantly knows you are walking down the street, while comfortably resting inside your pocket or bag? You pull it out, check a fitness app, and watch your daily count tick upward. It feels a bit like magic, but there is no tiny person inside your device counting your strides. Instead, your phone relies on clever physics, microscopic hardware, and smart software algorithms working together silently in the background.

Understanding how phone sensors track your steps reveals a fascinating intersection of mechanical engineering and modern computing. Let's decode the technology that turns your physical movement into digital data.

Key takeaways

Smartphones use microscopic MEMS accelerometers instead of GPS to track daily steps efficiently.
Multi-axis sensors measure changes in velocity along X, Y, and Z directions as you move.
Peak detection algorithms filter out vehicle vibrations and isolate the rhythmic shock of walking.
Walking distance is calculated by multiplying your step count by your estimated step length.
Early step-counting technology dates back to mechanical pedometers envisioned by Leonardo da Vinci.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How Phone Sensors Track Your Steps: The Tech Inside

Originally published at techdcoded.com.

How Smart Glasses Work: Inside Audio and Display Tech

TechDcoded — Thu, 24 Sep 2026 07:27:38 +0000

Have you ever looked at a pair of high-tech frames and wondered what is actually happening inside the plastic or metal arms? Smart glasses have evolved from clunky, sci-fi prototypes into sleek everyday eyewear. But fitting a computer, a screen, and a speaker system into a frame that sits comfortably on your face requires some remarkable engineering. Whether you see them in tech media or on high street shelves in Indian metros, these devices represent a fascinating fusion of optics, acoustics, and micro-electronics.

Unlike virtual reality headsets that completely swallow your field of vision with opaque screens, smart glasses are designed to keep you connected to the real world. They add a layer of digital utility—whether that means routing your walk through a bustling market, translating a signboard, or taking a phone call while your ears remain completely open to oncoming traffic. To understand how they pull this off, we have to look inside the frame and trace the journey of light and sound.

Key takeaways

Smart glasses use transparent optical waveguides to project digital images directly into your line of sight.
Audio is delivered either through directional open-ear speakers or bone-conduction transducers that bypass the eardrum.
Inertial Measurement Units (IMUs) and sensors track head movements and environmental context in real time.
Unlike bulky virtual reality headsets, smart glasses preserve your situational awareness of the physical world.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How Smart Glasses Work: Inside Audio and Display Tech

Originally published at techdcoded.com.

How Vinyl Records Work: The Physics of Groove Sound

TechDcoded — Thu, 24 Sep 2026 07:20:36 +0000

Take a moment to look closely at a vinyl record spinning on a turntable. To the naked eye, it looks like a flat black disc with shiny concentric rings. But if you were to zoom in with a microscope, you would see something quite remarkable: a single, unbroken, microscopic spiral highway carved into the plastic. As the record spins, a tiny needle drops into this winding path and translates plastic topography into soaring vocals, driving basslines, and crisp guitar solos.

In an era dominated by streaming digital files and invisible wireless data, the longevity of vinyl feels almost magical. Yet, there is no magic involved—just pure physics, precise mechanical engineering, and acoustics. To understand how vinyl records work is to appreciate a marvel of analog technology that has survived for over a century. Let us decode the physics of groove sound, step by step.

Key takeaways

Vinyl records store audio as a physical, continuous analog wave carved into microscopic plastic grooves.
A diamond stylus rides these groove walls, converting physical bumps into electrical current using magnets and coils.
Both stereo channels fit into a single V-shaped groove angled at 45 degrees.
Heavy equalization (RIAA) is required during cutting and playback to fit bass notes without wasting physical space.
India played a massive role in early vinyl history through Kolkata's historic pressing plants producing Bollywood and classical music.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How Vinyl Records Work: The Physics of Groove Sound

Originally published at techdcoded.com.

How 3D Printed Houses Work: Inside Robotic Construction

TechDcoded — Thu, 24 Sep 2026 07:20:33 +0000

Imagine a massive robotic arm moving with absolute precision, laying down ribbons of concrete the way a pastry chef decorates a multi-tiered cake. There are no bricks to haul, no scaffolding to assemble, and no manual troweling required for the base walls. This is the reality of modern additive construction—a field transforming how physical shelters are engineered from the ground up.

When exploring how 3d printed houses work, the shift is less about science fiction and more about bringing computer-aided manufacturing into the heavy-duty world of civil engineering. Instead of cutting down timber or stacking bricks by hand, builders are utilizing automated machinery to print structural walls directly from digital blueprints. Let's look inside the engineering, systems, and software driving this robotic revolution.

Key takeaways

Construction 3D printing builds structures layer by layer using digital CAD or 3D models.
Specialized materials like 3D concrete, polymers, and foams are deposited via a print head or nozzle.
Heavy-duty gantry systems and industrial robotic arms handle the physical fabrication on-site or off-site.
Early experiments date back to 1939, but modern second-generation tech has scaled into multi-story buildings and office spaces.

👉 Read the full explainer with diagrams and FAQs on TechDCoded: How 3D Printed Houses Work: Inside Robotic Construction

Originally published at techdcoded.com.