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A LITTLE DIRECTION

Project guides.

Practical notes to help you choose, plan and understand your project.

Illustration of LiPo battery packs with safety symbols, a balance charger, a fireproof storage bag, and a bucket of sand.B.E./B.Tech students using LiPo batteries in drones, robots, and portable final-year projects

LiPo Battery Safety: The Complete Student Guide

LiPos power the best student projects — and cause the worst accidents when mistreated. Learn real safety procedures: balance charging rules, storage voltage, C-rating current limits, damage inspection, what to do if a pack swells or catches fire, transport, and safe disposal.

Read guide Illustration of a LoRaWAN star-of-stars network: sensor nodes transmitting to a gateway tower, with data flowing to a cloud labeled The Things Network.B.E./B.Tech Electronics, E&TC and IoT students building long-range, low-power sensor networks for agriculture, campus or rural projects

LoRaWAN Setup with The Things Network

Get a battery sensor online kilometers from WiFi: LoRa vs LoRaWAN explained, device classes, OTAA joining, spreading factors and ADR, tiny payload design, The Things Network setup path, and the fair-use and coverage limits to design around.

Read guide Illustration of a building with a lightning protection system: air terminal mast, down-conductors, earth electrodes, and surge protective devices at the panel.B.E./B.Tech Electrical students studying power system protection, or designing projects that sit outdoors or on rooftops

Lightning Protection Basics

Lightning kills equipment through surges, not just direct strikes. This guide explains the four-layer protection system — air termination, down-conductors, earth termination and SPDs — with selection ratings, a rooftop solar worked example, bonding rules and the standards to cite.

Read guide Illustration comparing LangChain and LlamaIndex as two toolboxes — one for agent orchestration and one for data retrieval pipelines — feeding into an LLM application.B.E./B.Tech Computer Science students choosing a framework for an LLM project — RAG chatbot, document Q&A, or agent prototype

LangChain vs LlamaIndex: Which to Use

LangChain is for application logic and agents; LlamaIndex is for data ingestion and retrieval. This guide compares them head-to-head, gives a decision framework (including when to skip frameworks entirely), shows the shape of each, and warns about version churn and the abstraction tax.

Read guide Illustration of a fiber laser cutting head slicing sheet metal with assist gas, showing kerf width, focus position and a clean vs dross-covered cut edge comparison.B.E./B.Tech Mechanical students cutting sheet-metal parts on a laser for enclosures, chassis and project hardware

Laser Cutting Parameters Explained

Power, speed, focus, gas pressure — the four knobs behind every laser-cut edge. This guide explains how each parameter affects quality, how to read defects from the edge (dross, striations, taper), kerf compensation, design rules (hole ≥ thickness), tolerances, and the job-shop checklist.

Read guide Illustration of JWT refresh token rotation showing an access token and refresh token pair being exchanged for a fresh pair in a cycle.B.E./B.Tech Computer Science and IT students who have implemented basic JWT login and need secure, long-lived sessions without making users log in repeatedly

JWT Refresh Token Rotation Done Right

Short-lived access tokens plus long-lived refresh tokens solve the JWT expiry dilemma — but only with rotation. This guide explains the two-token model, how rotation detects stolen tokens, where to store each token, and the silent-refresh pattern users expect.

Read guide Illustration of a smartphone showing a Jetpack Compose UI with composable function blocks and state flow arrows connecting them.B.E./B.Tech Computer Science and IT students building Android apps for academic and final-year projects

Jetpack Compose Basics for Students

Learn Jetpack Compose from zero: the declarative UI mental model (UI as a function of state), composable function rules, state management with remember and hoisting, Column/Row/Box/LazyColumn layouts, Material 3 theming, navigation, and the mistakes every beginner makes.

Read guide Illustration of inverse kinematics for a robot arm showing joint angles computed to reach a target point in space.B.E./B.Tech Mechanical, Mechatronics, and Electronics students building robot arms who can move individual servos but want the arm to reach specific XYZ coordinates

Inverse Kinematics for Robot Arms

Telling a robot arm to reach an XYZ point requires inverse kinematics — turning target positions into joint angles. This guide derives the 2-link geometric solution, extends it to the common 3-DOF student arm, surveys numerical methods, and covers the calibration that separates theory from a working arm.

Read guide Illustration of a smart home dashboard on a tablet showing temperature, lights and switches, with ESP32 sensor nodes wirelessly connected around a house.B.E./B.Tech Electronics, E&TC and IoT students who want their ESP32 devices to appear in a proper smart-home platform instead of a custom-built app

Home Assistant with ESP32: A Student Guide

Turn ESP32 sensor nodes into a polished smart-home demo with Home Assistant. Covers the ESPHome YAML path vs the flexible MQTT path, entities and auto-discovery, automations that make projects feel like systems, dashboards, and deployment gotchas.

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